15219332477

Committed 23 May 2025 09:13PM UTC coverage: 17.216% (-59.1%) from 76.346%

Build # 15219332477

Build Type

Pull #11332

github

Committed by

naorpeled

Commit Message

cr comments - move if block

Pull Request Pull Request #11332: feat: add new undefined and null behavior flags

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1.51

/src/query-builder/QueryBuilder.ts

import { ObjectLiteral } from "../common/ObjectLiteral"
import { QueryRunner } from "../query-runner/QueryRunner"
import { DataSource } from "../data-source/DataSource"
import { QueryBuilderCteOptions } from "./QueryBuilderCte"
import { QueryExpressionMap } from "./QueryExpressionMap"
import { SelectQueryBuilder } from "./SelectQueryBuilder"
import { UpdateQueryBuilder } from "./UpdateQueryBuilder"
import { DeleteQueryBuilder } from "./DeleteQueryBuilder"
import { SoftDeleteQueryBuilder } from "./SoftDeleteQueryBuilder"
import { InsertQueryBuilder } from "./InsertQueryBuilder"
import { RelationQueryBuilder } from "./RelationQueryBuilder"
import { EntityTarget } from "../common/EntityTarget"
import { Alias } from "./Alias"
import { Brackets } from "./Brackets"
import { QueryDeepPartialEntity } from "./QueryPartialEntity"
import { EntityMetadata } from "../metadata/EntityMetadata"
import { ColumnMetadata } from "../metadata/ColumnMetadata"
import { FindOperator } from "../find-options/FindOperator"
import { In } from "../find-options/operator/In"
import { TypeORMError } from "../error"
import { WhereClause, WhereClauseCondition } from "./WhereClause"
import { NotBrackets } from "./NotBrackets"
import { EntityPropertyNotFoundError } from "../error/EntityPropertyNotFoundError"
import { ReturningType } from "../driver/Driver"
import { OracleDriver } from "../driver/oracle/OracleDriver"
import { InstanceChecker } from "../util/InstanceChecker"
import { escapeRegExp } from "../util/escapeRegExp"

// todo: completely cover query builder with tests
// todo: entityOrProperty can be target name. implement proper behaviour if it is.
// todo: check in persistment if id exist on object and throw exception (can be in partial selection?)
// todo: fix problem with long aliases eg getMaxIdentifierLength
// todo: fix replacing in .select("COUNT(post.id) AS cnt") statement
// todo: implement joinAlways in relations and relationId
// todo: finish partial selection
// todo: sugar methods like: .addCount and .selectCount, selectCountAndMap, selectSum, selectSumAndMap, ...
// todo: implement @Select decorator
// todo: add select and map functions

// todo: implement relation/entity loading and setting them into properties within a separate query
// .loadAndMap("post.categories", "post.categories", qb => ...)
// .loadAndMap("post.categories", Category, qb => ...)

/**
 * Allows to build complex sql queries in a fashion way and execute those queries.
 */
export abstract class QueryBuilder<Entity extends ObjectLiteral> {
    readonly "@instanceof" = Symbol.for("QueryBuilder")

    // -------------------------------------------------------------------------
    // Public Properties
    // -------------------------------------------------------------------------

    /**
     * Connection on which QueryBuilder was created.
     */
    readonly connection: DataSource

    /**
     * Contains all properties of the QueryBuilder that needs to be build a final query.
     */
    readonly expressionMap: QueryExpressionMap

    // -------------------------------------------------------------------------
    // Protected Properties
    // -------------------------------------------------------------------------

    /**
     * Query runner used to execute query builder query.
     */
    protected queryRunner?: QueryRunner

    /**
     * If QueryBuilder was created in a subquery mode then its parent QueryBuilder (who created subquery) will be stored here.
     */
    protected parentQueryBuilder: QueryBuilder<any>

    /**
     * Memo to help keep place of current parameter index for `createParameter`
     */
    private parameterIndex = 0

    /**
     * Contains all registered query builder classes.
     */
    private static queryBuilderRegistry: Record<string, any> = {}

    // -------------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------------

    /**
     * QueryBuilder can be initialized from given Connection and QueryRunner objects or from given other QueryBuilder.
     */
    constructor(queryBuilder: QueryBuilder<any>)

    /**
     * QueryBuilder can be initialized from given Connection and QueryRunner objects or from given other QueryBuilder.
     */
    constructor(connection: DataSource, queryRunner?: QueryRunner)

    /**
     * QueryBuilder can be initialized from given Connection and QueryRunner objects or from given other QueryBuilder.
     */
    constructor(
        connectionOrQueryBuilder: DataSource | QueryBuilder<any>,
        queryRunner?: QueryRunner,
    ) {
        if (InstanceChecker.isDataSource(connectionOrQueryBuilder)) {
            this.connection = connectionOrQueryBuilder
            this.queryRunner = queryRunner
            this.expressionMap = new QueryExpressionMap(this.connection)
        } else {
            this.connection = connectionOrQueryBuilder.connection
            this.queryRunner = connectionOrQueryBuilder.queryRunner
            this.expressionMap = connectionOrQueryBuilder.expressionMap.clone()
        }
    }

    static registerQueryBuilderClass(name: string, factory: any) {
        QueryBuilder.queryBuilderRegistry[name] = factory
    }

    // -------------------------------------------------------------------------
    // Abstract Methods
    // -------------------------------------------------------------------------

    /**
     * Gets generated SQL query without parameters being replaced.
     */
    abstract getQuery(): string

    // -------------------------------------------------------------------------
    // Accessors
    // -------------------------------------------------------------------------

    /**
     * Gets the main alias string used in this query builder.
     */
    get alias(): string {
        if (!this.expressionMap.mainAlias)
            throw new TypeORMError(`Main alias is not set`) // todo: better exception

        return this.expressionMap.mainAlias.name
    }

    // -------------------------------------------------------------------------
    // Public Methods
    // -------------------------------------------------------------------------

    /**
     * Creates SELECT query.
     * Replaces all previous selections if they exist.
     */
    select(): SelectQueryBuilder<Entity>

    /**
     * Creates SELECT query and selects given data.
     * Replaces all previous selections if they exist.
     */
    select(
        selection: string,
        selectionAliasName?: string,
    ): SelectQueryBuilder<Entity>

    /**
     * Creates SELECT query and selects given data.
     * Replaces all previous selections if they exist.
     */
    select(selection: string[]): SelectQueryBuilder<Entity>

    /**
     * Creates SELECT query and selects given data.
     * Replaces all previous selections if they exist.
     */
    select(
        selection?: string | string[],
        selectionAliasName?: string,
    ): SelectQueryBuilder<Entity> {
        this.expressionMap.queryType = "select"
        if (Array.isArray(selection)) {
            this.expressionMap.selects = selection.map((selection) => ({
                selection: selection,
            }))
        } else if (selection) {
            this.expressionMap.selects = [
                { selection: selection, aliasName: selectionAliasName },
            ]
        }

        if (InstanceChecker.isSelectQueryBuilder(this)) return this as any

        return QueryBuilder.queryBuilderRegistry["SelectQueryBuilder"](this)
    }

    /**
     * Creates INSERT query.
     */
    insert(): InsertQueryBuilder<Entity> {
        this.expressionMap.queryType = "insert"

        if (InstanceChecker.isInsertQueryBuilder(this)) return this as any

        return QueryBuilder.queryBuilderRegistry["InsertQueryBuilder"](this)
    }

    /**
     * Creates UPDATE query and applies given update values.
     */
    update(): UpdateQueryBuilder<Entity>

    /**
     * Creates UPDATE query and applies given update values.
     */
    update(
        updateSet: QueryDeepPartialEntity<Entity>,
    ): UpdateQueryBuilder<Entity>

    /**
     * Creates UPDATE query for the given entity and applies given update values.
     */
    update<Entity extends ObjectLiteral>(
        entity: EntityTarget<Entity>,
        updateSet?: QueryDeepPartialEntity<Entity>,
    ): UpdateQueryBuilder<Entity>

    /**
     * Creates UPDATE query for the given table name and applies given update values.
     */
    update(
        tableName: string,
        updateSet?: QueryDeepPartialEntity<Entity>,
    ): UpdateQueryBuilder<Entity>

    /**
     * Creates UPDATE query and applies given update values.
     */
    update(
        entityOrTableNameUpdateSet?: EntityTarget<any> | ObjectLiteral,
        maybeUpdateSet?: ObjectLiteral,
    ): UpdateQueryBuilder<any> {
        const updateSet = maybeUpdateSet
            ? maybeUpdateSet
            : (entityOrTableNameUpdateSet as ObjectLiteral | undefined)
        entityOrTableNameUpdateSet = InstanceChecker.isEntitySchema(
            entityOrTableNameUpdateSet,
        )
            ? entityOrTableNameUpdateSet.options.name
            : entityOrTableNameUpdateSet

        if (
            typeof entityOrTableNameUpdateSet === "function" ||
            typeof entityOrTableNameUpdateSet === "string"
        ) {
            const mainAlias = this.createFromAlias(entityOrTableNameUpdateSet)
            this.expressionMap.setMainAlias(mainAlias)
        }

        this.expressionMap.queryType = "update"
        this.expressionMap.valuesSet = updateSet

        if (InstanceChecker.isUpdateQueryBuilder(this)) return this as any

        return QueryBuilder.queryBuilderRegistry["UpdateQueryBuilder"](this)
    }

    /**
     * Creates DELETE query.
     */
    delete(): DeleteQueryBuilder<Entity> {
        this.expressionMap.queryType = "delete"

        if (InstanceChecker.isDeleteQueryBuilder(this)) return this as any

        return QueryBuilder.queryBuilderRegistry["DeleteQueryBuilder"](this)
    }

    softDelete(): SoftDeleteQueryBuilder<any> {
        this.expressionMap.queryType = "soft-delete"

        if (InstanceChecker.isSoftDeleteQueryBuilder(this)) return this as any

        return QueryBuilder.queryBuilderRegistry["SoftDeleteQueryBuilder"](this)
    }

    restore(): SoftDeleteQueryBuilder<any> {
        this.expressionMap.queryType = "restore"

        if (InstanceChecker.isSoftDeleteQueryBuilder(this)) return this as any

        return QueryBuilder.queryBuilderRegistry["SoftDeleteQueryBuilder"](this)
    }

    /**
     * Sets entity's relation with which this query builder gonna work.
     */
    relation(propertyPath: string): RelationQueryBuilder<Entity>

    /**
     * Sets entity's relation with which this query builder gonna work.
     */
    relation<T extends ObjectLiteral>(
        entityTarget: EntityTarget<T>,
        propertyPath: string,
    ): RelationQueryBuilder<T>

    /**
     * Sets entity's relation with which this query builder gonna work.
     */
    relation(
        entityTargetOrPropertyPath: Function | string,
        maybePropertyPath?: string,
    ): RelationQueryBuilder<Entity> {
        const entityTarget =
            arguments.length === 2 ? entityTargetOrPropertyPath : undefined
        const propertyPath =
            arguments.length === 2
                ? (maybePropertyPath as string)
                : (entityTargetOrPropertyPath as string)

        this.expressionMap.queryType = "relation"
        this.expressionMap.relationPropertyPath = propertyPath

        if (entityTarget) {
            const mainAlias = this.createFromAlias(entityTarget)
            this.expressionMap.setMainAlias(mainAlias)
        }

        if (InstanceChecker.isRelationQueryBuilder(this)) return this as any

        return QueryBuilder.queryBuilderRegistry["RelationQueryBuilder"](this)
    }

    /**
     * Checks if given relation exists in the entity.
     * Returns true if relation exists, false otherwise.
     *
     * todo: move this method to manager? or create a shortcut?
     */
    hasRelation<T>(target: EntityTarget<T>, relation: string): boolean

    /**
     * Checks if given relations exist in the entity.
     * Returns true if relation exists, false otherwise.
     *
     * todo: move this method to manager? or create a shortcut?
     */
    hasRelation<T>(target: EntityTarget<T>, relation: string[]): boolean

    /**
     * Checks if given relation or relations exist in the entity.
     * Returns true if relation exists, false otherwise.
     *
     * todo: move this method to manager? or create a shortcut?
     */
    hasRelation<T>(
        target: EntityTarget<T>,
        relation: string | string[],
    ): boolean {
        const entityMetadata = this.connection.getMetadata(target)
        const relations = Array.isArray(relation) ? relation : [relation]
        return relations.every((relation) => {
            return !!entityMetadata.findRelationWithPropertyPath(relation)
        })
    }

    /**
     * Check the existence of a parameter for this query builder.
     */
    hasParameter(key: string): boolean {
        return (
            this.parentQueryBuilder?.hasParameter(key) ||
            key in this.expressionMap.parameters
        )
    }

    /**
     * Sets parameter name and its value.
     *
     * The key for this parameter may contain numbers, letters, underscores, or periods.
     */
    setParameter(key: string, value: any): this {
        if (typeof value === "function") {
            throw new TypeORMError(
                `Function parameter isn't supported in the parameters. Please check "${key}" parameter.`,
            )
        }

        if (!key.match(/^([A-Za-z0-9_.]+)$/)) {
            throw new TypeORMError(
                "QueryBuilder parameter keys may only contain numbers, letters, underscores, or periods.",
            )
        }

        if (this.parentQueryBuilder) {
            this.parentQueryBuilder.setParameter(key, value)
        }

        this.expressionMap.parameters[key] = value
        return this
    }

    /**
     * Adds all parameters from the given object.
     */
    setParameters(parameters: ObjectLiteral): this {
        for (const [key, value] of Object.entries(parameters)) {
            this.setParameter(key, value)
        }

        return this
    }

    protected createParameter(value: any): string {
        let parameterName

        do {
            parameterName = `orm_param_${this.parameterIndex++}`
        } while (this.hasParameter(parameterName))

        this.setParameter(parameterName, value)

        return `:${parameterName}`
    }

    /**
     * Adds native parameters from the given object.
     *
     * @deprecated Use `setParameters` instead
     */
    setNativeParameters(parameters: ObjectLiteral): this {
        // set parent query builder parameters as well in sub-query mode
        if (this.parentQueryBuilder) {
            this.parentQueryBuilder.setNativeParameters(parameters)
        }

        Object.keys(parameters).forEach((key) => {
            this.expressionMap.nativeParameters[key] = parameters[key]
        })
        return this
    }

    /**
     * Gets all parameters.
     */
    getParameters(): ObjectLiteral {
        const parameters: ObjectLiteral = Object.assign(
            {},
            this.expressionMap.parameters,
        )

        // add discriminator column parameter if it exist
        if (
            this.expressionMap.mainAlias &&
            this.expressionMap.mainAlias.hasMetadata
        ) {
            const metadata = this.expressionMap.mainAlias!.metadata
            if (metadata.discriminatorColumn && metadata.parentEntityMetadata) {
                const values = metadata.childEntityMetadatas
                    .filter(
                        (childMetadata) => childMetadata.discriminatorColumn,
                    )
                    .map((childMetadata) => childMetadata.discriminatorValue)
                values.push(metadata.discriminatorValue)
                parameters["discriminatorColumnValues"] = values
            }
        }

        return parameters
    }

    /**
     * Prints sql to stdout using console.log.
     */
    printSql(): this {
        // TODO rename to logSql()
        const [query, parameters] = this.getQueryAndParameters()
        this.connection.logger.logQuery(query, parameters)
        return this
    }

    /**
     * Gets generated sql that will be executed.
     * Parameters in the query are escaped for the currently used driver.
     */
    getSql(): string {
        return this.getQueryAndParameters()[0]
    }

    /**
     * Gets query to be executed with all parameters used in it.
     */
    getQueryAndParameters(): [string, any[]] {
        // this execution order is important because getQuery method generates this.expressionMap.nativeParameters values
        const query = this.getQuery()
        const parameters = this.getParameters()
        return this.connection.driver.escapeQueryWithParameters(
            query,
            parameters,
            this.expressionMap.nativeParameters,
        )
    }

    /**
     * Executes sql generated by query builder and returns raw database results.
     */
    async execute(): Promise<any> {
        const [sql, parameters] = this.getQueryAndParameters()
        const queryRunner = this.obtainQueryRunner()
        try {
            return await queryRunner.query(sql, parameters) // await is needed here because we are using finally
        } finally {
            if (queryRunner !== this.queryRunner) {
                // means we created our own query runner
                await queryRunner.release()
            }
        }
    }

    /**
     * Creates a completely new query builder.
     * Uses same query runner as current QueryBuilder.
     */
    createQueryBuilder(queryRunner?: QueryRunner): this {
        return new (this.constructor as any)(
            this.connection,
            queryRunner ?? this.queryRunner,
        )
    }

    /**
     * Clones query builder as it is.
     * Note: it uses new query runner, if you want query builder that uses exactly same query runner,
     * you can create query builder using its constructor, for example new SelectQueryBuilder(queryBuilder)
     * where queryBuilder is cloned QueryBuilder.
     */
    clone(): this {
        return new (this.constructor as any)(this)
    }

    /**
     * Includes a Query comment in the query builder.  This is helpful for debugging purposes,
     * such as finding a specific query in the database server's logs, or for categorization using
     * an APM product.
     */
    comment(comment: string): this {
        this.expressionMap.comment = comment
        return this
    }

    /**
     * Disables escaping.
     */
    disableEscaping(): this {
        this.expressionMap.disableEscaping = false
        return this
    }

    /**
     * Escapes table name, column name or alias name using current database's escaping character.
     */
    escape(name: string): string {
        if (!this.expressionMap.disableEscaping) return name
        return this.connection.driver.escape(name)
    }

    /**
     * Sets or overrides query builder's QueryRunner.
     */
    setQueryRunner(queryRunner: QueryRunner): this {
        this.queryRunner = queryRunner
        return this
    }

    /**
     * Indicates if listeners and subscribers must be called before and after query execution.
     * Enabled by default.
     */
    callListeners(enabled: boolean): this {
        this.expressionMap.callListeners = enabled
        return this
    }

    /**
     * If set to true the query will be wrapped into a transaction.
     */
    useTransaction(enabled: boolean): this {
        this.expressionMap.useTransaction = enabled
        return this
    }

    /**
     * Adds CTE to query
     */
    addCommonTableExpression(
        queryBuilder: QueryBuilder<any> | string,
        alias: string,
        options?: QueryBuilderCteOptions,
    ): this {
        this.expressionMap.commonTableExpressions.push({
            queryBuilder,
            alias,
            options: options || {},
        })
        return this
    }

    // -------------------------------------------------------------------------
    // Protected Methods
    // -------------------------------------------------------------------------

    /**
     * Gets escaped table name with schema name if SqlServer driver used with custom
     * schema name, otherwise returns escaped table name.
     */
    protected getTableName(tablePath: string): string {
        return tablePath
            .split(".")
            .map((i) => {
                // this condition need because in SQL Server driver when custom database name was specified and schema name was not, we got `dbName..tableName` string, and doesn't need to escape middle empty string
                if (i === "") return i
                return this.escape(i)
            })
            .join(".")
    }

    /**
     * Gets name of the table where insert should be performed.
     */
    protected getMainTableName(): string {
        if (!this.expressionMap.mainAlias)
            throw new TypeORMError(
                `Entity where values should be inserted is not specified. Call "qb.into(entity)" method to specify it.`,
            )

        if (this.expressionMap.mainAlias.hasMetadata)
            return this.expressionMap.mainAlias.metadata.tablePath

        return this.expressionMap.mainAlias.tablePath!
    }

    /**
     * Specifies FROM which entity's table select/update/delete will be executed.
     * Also sets a main string alias of the selection data.
     */
    protected createFromAlias(
        entityTarget:
            | EntityTarget<any>
            | ((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>),
        aliasName?: string,
    ): Alias {
        // if table has a metadata then find it to properly escape its properties
        // const metadata = this.connection.entityMetadatas.find(metadata => metadata.tableName === tableName);
        if (this.connection.hasMetadata(entityTarget)) {
            const metadata = this.connection.getMetadata(entityTarget)

            return this.expressionMap.createAlias({
                type: "from",
                name: aliasName,
                metadata: this.connection.getMetadata(entityTarget),
                tablePath: metadata.tablePath,
            })
        } else {
            if (typeof entityTarget === "string") {
                const isSubquery =
                    entityTarget.substr(0, 1) === "(" &&
                    entityTarget.substr(-1) === ")"

                return this.expressionMap.createAlias({
                    type: "from",
                    name: aliasName,
                    tablePath: !isSubquery
                        ? (entityTarget as string)
                        : undefined,
                    subQuery: isSubquery ? entityTarget : undefined,
                })
            }

            const subQueryBuilder: SelectQueryBuilder<any> = (
                entityTarget as any
            )((this as any as SelectQueryBuilder<any>).subQuery())
            this.setParameters(subQueryBuilder.getParameters())
            const subquery = subQueryBuilder.getQuery()

            return this.expressionMap.createAlias({
                type: "from",
                name: aliasName,
                subQuery: subquery,
            })
        }
    }

    /**
     * @deprecated this way of replace property names is too slow.
     *  Instead, we'll replace property names at the end - once query is build.
     */
    protected replacePropertyNames(statement: string) {
        return statement
    }

    /**
     * Replaces all entity's propertyName to name in the given SQL string.
     */
    protected replacePropertyNamesForTheWholeQuery(statement: string) {
        const replacements: { [key: string]: { [key: string]: string } } = {}

        for (const alias of this.expressionMap.aliases) {
            if (!alias.hasMetadata) continue
            const replaceAliasNamePrefix =
                this.expressionMap.aliasNamePrefixingEnabled && alias.name
                    ? `${alias.name}.`
                    : ""

            if (!replacements[replaceAliasNamePrefix]) {
                replacements[replaceAliasNamePrefix] = {}
            }

            // Insert & overwrite the replacements from least to most relevant in our replacements object.
            // To do this we iterate and overwrite in the order of relevance.
            // Least to Most Relevant:
            // * Relation Property Path to first join column key
            // * Relation Property Path + Column Path
            // * Column Database Name
            // * Column Property Name
            // * Column Property Path

            for (const relation of alias.metadata.relations) {
                if (relation.joinColumns.length > 0)
                    replacements[replaceAliasNamePrefix][
                        relation.propertyPath
                    ] = relation.joinColumns[0].databaseName
            }

            for (const relation of alias.metadata.relations) {
                const allColumns = [
                    ...relation.joinColumns,
                    ...relation.inverseJoinColumns,
                ]
                for (const joinColumn of allColumns) {
                    const propertyKey = `${relation.propertyPath}.${
                        joinColumn.referencedColumn!.propertyPath
                    }`
                    replacements[replaceAliasNamePrefix][propertyKey] =
                        joinColumn.databaseName
                }
            }

            for (const column of alias.metadata.columns) {
                replacements[replaceAliasNamePrefix][column.databaseName] =
                    column.databaseName
            }

            for (const column of alias.metadata.columns) {
                replacements[replaceAliasNamePrefix][column.propertyName] =
                    column.databaseName
            }

            for (const column of alias.metadata.columns) {
                replacements[replaceAliasNamePrefix][column.propertyPath] =
                    column.databaseName
            }
        }

        const replacementKeys = Object.keys(replacements)
        const replaceAliasNamePrefixes = replacementKeys
            .map((key) => escapeRegExp(key))
            .join("|")

        if (replacementKeys.length > 0) {
            statement = statement.replace(
                new RegExp(
                    // Avoid a lookbehind here since it's not well supported
                    `([ =(]|^.{0})` + // any of ' =(' or start of line
                        // followed by our prefix, e.g. 'tablename.' or ''
                        `${
                            replaceAliasNamePrefixes
                                ? "(" + replaceAliasNamePrefixes + ")"
                                : ""
                        }([^ =(),]+)` + // a possible property name: sequence of anything but ' =(),'
                        // terminated by ' =),' or end of line
                        `(?=[ =),]|.{0}$)`,
                    "gm",
                ),
                (...matches) => {
                    let match: string, pre: string, p: string
                    if (replaceAliasNamePrefixes) {
                        match = matches[0]
                        pre = matches[1]
                        p = matches[3]

                        if (replacements[matches[2]][p]) {
                            return `${pre}${this.escape(
                                matches[2].substring(0, matches[2].length - 1),
                            )}.${this.escape(replacements[matches[2]][p])}`
                        }
                    } else {
                        match = matches[0]
                        pre = matches[1]
                        p = matches[2]

                        if (replacements[""][p]) {
                            return `${pre}${this.escape(replacements[""][p])}`
                        }
                    }
                    return match
                },
            )
        }

        return statement
    }

    protected createComment(): string {
        if (!this.expressionMap.comment) {
            return ""
        }

        // ANSI SQL 2003 support C style comments - comments that start with `/*` and end with `*/`
        // In some dialects query nesting is available - but not all.  Because of this, we'll need
        // to scrub "ending" characters from the SQL but otherwise we can leave everything else
        // as-is and it should be valid.

        return `/* ${this.expressionMap.comment.replace(/\*\//g, "")} */ `
    }

    /**
     * Time travel queries for CockroachDB
     */
    protected createTimeTravelQuery(): string {
        if (
            this.expressionMap.queryType === "select" &&
            this.expressionMap.timeTravel
        ) {
            return ` AS OF SYSTEM TIME ${this.expressionMap.timeTravel}`
        }

        return ""
    }

    /**
     * Creates "WHERE" expression.
     */
    protected createWhereExpression() {
        const conditionsArray = []

        const whereExpression = this.createWhereClausesExpression(
            this.expressionMap.wheres,
        )

        if (whereExpression.length > 0 && whereExpression !== "1=1") {
            conditionsArray.push(this.replacePropertyNames(whereExpression))
        }

        if (this.expressionMap.mainAlias!.hasMetadata) {
            const metadata = this.expressionMap.mainAlias!.metadata
            // Adds the global condition of "non-deleted" for the entity with delete date columns in select query.
            if (
                this.expressionMap.queryType === "select" &&
                !this.expressionMap.withDeleted &&
                metadata.deleteDateColumn
            ) {
                const column = this.expressionMap.aliasNamePrefixingEnabled
                    ? this.expressionMap.mainAlias!.name +
                      "." +
                      metadata.deleteDateColumn.propertyName
                    : metadata.deleteDateColumn.propertyName

                const condition = `${this.replacePropertyNames(column)} IS NULL`
                conditionsArray.push(condition)
            }

            if (metadata.discriminatorColumn && metadata.parentEntityMetadata) {
                const column = this.expressionMap.aliasNamePrefixingEnabled
                    ? this.expressionMap.mainAlias!.name +
                      "." +
                      metadata.discriminatorColumn.databaseName
                    : metadata.discriminatorColumn.databaseName

                const condition = `${this.replacePropertyNames(
                    column,
                )} IN (:...discriminatorColumnValues)`
                conditionsArray.push(condition)
            }
        }

        if (this.expressionMap.extraAppendedAndWhereCondition) {
            const condition = this.replacePropertyNames(
                this.expressionMap.extraAppendedAndWhereCondition,
            )
            conditionsArray.push(condition)
        }

        let condition = ""

        // time travel
        condition += this.createTimeTravelQuery()

        if (!conditionsArray.length) {
            condition += ""
        } else if (conditionsArray.length === 1) {
            condition += ` WHERE ${conditionsArray[0]}`
        } else {
            condition += ` WHERE ( ${conditionsArray.join(" ) AND ( ")} )`
        }

        return condition
    }

    /**
     * Creates "RETURNING" / "OUTPUT" expression.
     */
    protected createReturningExpression(returningType: ReturningType): string {
        const columns = this.getReturningColumns()
        const driver = this.connection.driver

        // also add columns we must auto-return to perform entity updation
        // if user gave his own returning
        if (
            typeof this.expressionMap.returning !== "string" &&
            this.expressionMap.extraReturningColumns.length > 0 &&
            driver.isReturningSqlSupported(returningType)
        ) {
            columns.push(
                ...this.expressionMap.extraReturningColumns.filter((column) => {
                    return columns.indexOf(column) === -1
                }),
            )
        }

        if (columns.length) {
            let columnsExpression = columns
                .map((column) => {
                    const name = this.escape(column.databaseName)
                    if (driver.options.type === "mssql") {
                        if (
                            this.expressionMap.queryType === "insert" ||
                            this.expressionMap.queryType === "update" ||
                            this.expressionMap.queryType === "soft-delete" ||
                            this.expressionMap.queryType === "restore"
                        ) {
                            return "INSERTED." + name
                        } else {
                            return (
                                this.escape(this.getMainTableName()) +
                                "." +
                                name
                            )
                        }
                    } else {
                        return name
                    }
                })
                .join(", ")

            if (driver.options.type === "oracle") {
                columnsExpression +=
                    " INTO " +
                    columns
                        .map((column) => {
                            return this.createParameter({
                                type: (
                                    driver as OracleDriver
                                ).columnTypeToNativeParameter(column.type),
                                dir: (driver as OracleDriver).oracle.BIND_OUT,
                            })
                        })
                        .join(", ")
            }

            if (driver.options.type === "mssql") {
                if (
                    this.expressionMap.queryType === "insert" ||
                    this.expressionMap.queryType === "update"
                ) {
                    columnsExpression += " INTO @OutputTable"
                }
            }

            return columnsExpression
        } else if (typeof this.expressionMap.returning === "string") {
            return this.expressionMap.returning
        }

        return ""
    }

    /**
     * If returning / output cause is set to array of column names,
     * then this method will return all column metadatas of those column names.
     */
    protected getReturningColumns(): ColumnMetadata[] {
        const columns: ColumnMetadata[] = []
        if (Array.isArray(this.expressionMap.returning)) {
            ;(this.expressionMap.returning as string[]).forEach(
                (columnName) => {
                    if (this.expressionMap.mainAlias!.hasMetadata) {
                        columns.push(
                            ...this.expressionMap.mainAlias!.metadata.findColumnsWithPropertyPath(
                                columnName,
                            ),
                        )
                    }
                },
            )
        }
        return columns
    }

    protected createWhereClausesExpression(clauses: WhereClause[]): string {
        return clauses
            .map((clause, index) => {
                const expression = this.createWhereConditionExpression(
                    clause.condition,
                )

                switch (clause.type) {
                    case "and":
                        return (
                            (index > 0 ? "AND " : "") +
                            `${
                                this.connection.options.isolateWhereStatements
                                    ? "("
                                    : ""
                            }${expression}${
                                this.connection.options.isolateWhereStatements
                                    ? ")"
                                    : ""
                            }`
                        )
                    case "or":
                        return (
                            (index > 0 ? "OR " : "") +
                            `${
                                this.connection.options.isolateWhereStatements
                                    ? "("
                                    : ""
                            }${expression}${
                                this.connection.options.isolateWhereStatements
                                    ? ")"
                                    : ""
                            }`
                        )
                }

                return expression
            })
            .join(" ")
            .trim()
    }

    /**
     * Computes given where argument - transforms to a where string all forms it can take.
     */
    protected createWhereConditionExpression(
        condition: WhereClauseCondition,
        alwaysWrap: boolean = false,
    ): string {
        if (typeof condition === "string") return condition

        if (Array.isArray(condition)) {
            if (condition.length === 0) {
                return "1=1"
            }

            // In the future we should probably remove this entire condition
            // but for now to prevent any breaking changes it exists.
            if (condition.length === 1 && !alwaysWrap) {
                return this.createWhereClausesExpression(condition)
            }

            return "(" + this.createWhereClausesExpression(condition) + ")"
        }

        const { driver } = this.connection

        switch (condition.operator) {
            case "lessThan":
                return `${condition.parameters[0]} < ${condition.parameters[1]}`
            case "lessThanOrEqual":
                return `${condition.parameters[0]} <= ${condition.parameters[1]}`
            case "arrayContains":
                return `${condition.parameters[0]} @> ${condition.parameters[1]}`
            case "jsonContains":
                return `${condition.parameters[0]} ::jsonb @> ${condition.parameters[1]}`
            case "arrayContainedBy":
                return `${condition.parameters[0]} <@ ${condition.parameters[1]}`
            case "arrayOverlap":
                return `${condition.parameters[0]} && ${condition.parameters[1]}`
            case "moreThan":
                return `${condition.parameters[0]} > ${condition.parameters[1]}`
            case "moreThanOrEqual":
                return `${condition.parameters[0]} >= ${condition.parameters[1]}`
            case "notEqual":
                return `${condition.parameters[0]} != ${condition.parameters[1]}`
            case "equal":
                return `${condition.parameters[0]} = ${condition.parameters[1]}`
            case "ilike":
                if (
                    driver.options.type === "postgres" ||
                    driver.options.type === "cockroachdb"
                ) {
                    return `${condition.parameters[0]} ILIKE ${condition.parameters[1]}`
                }

                return `UPPER(${condition.parameters[0]}) LIKE UPPER(${condition.parameters[1]})`
            case "like":
                return `${condition.parameters[0]} LIKE ${condition.parameters[1]}`
            case "between":
                return `${condition.parameters[0]} BETWEEN ${condition.parameters[1]} AND ${condition.parameters[2]}`
            case "in":
                if (condition.parameters.length <= 1) {
                    return "0=1"
                }
                return `${condition.parameters[0]} IN (${condition.parameters
                    .slice(1)
                    .join(", ")})`
            case "any":
                if (driver.options.type === "cockroachdb") {
                    return `${condition.parameters[0]}::STRING = ANY(${condition.parameters[1]}::STRING[])`
                }

                return `${condition.parameters[0]} = ANY(${condition.parameters[1]})`
            case "isNull":
                return `${condition.parameters[0]} IS NULL`

            case "not":
                return `NOT(${this.createWhereConditionExpression(
                    condition.condition,
                )})`
            case "brackets":
                return `${this.createWhereConditionExpression(
                    condition.condition,
                    true,
                )}`
            case "and":
                return "(" + condition.parameters.join(" AND ") + ")"
            case "or":
                return "(" + condition.parameters.join(" OR ") + ")"
        }

        throw new TypeError(
            `Unsupported FindOperator ${FindOperator.constructor.name}`,
        )
    }

    protected createCteExpression(): string {
        if (!this.hasCommonTableExpressions()) {
            return ""
        }
        const databaseRequireRecusiveHint =
            this.connection.driver.cteCapabilities.requiresRecursiveHint

        const cteStrings = this.expressionMap.commonTableExpressions.map(
            (cte) => {
                let cteBodyExpression =
                    typeof cte.queryBuilder === "string" ? cte.queryBuilder : ""
                if (typeof cte.queryBuilder !== "string") {
                    if (cte.queryBuilder.hasCommonTableExpressions()) {
                        throw new TypeORMError(
                            `Nested CTEs aren't supported (CTE: ${cte.alias})`,
                        )
                    }
                    cteBodyExpression = cte.queryBuilder.getQuery()
                    if (
                        !this.connection.driver.cteCapabilities.writable &&
                        !InstanceChecker.isSelectQueryBuilder(cte.queryBuilder)
                    ) {
                        throw new TypeORMError(
                            `Only select queries are supported in CTEs in ${this.connection.options.type} (CTE: ${cte.alias})`,
                        )
                    }
                    this.setParameters(cte.queryBuilder.getParameters())
                }
                let cteHeader = this.escape(cte.alias)
                if (cte.options.columnNames) {
                    const escapedColumnNames = cte.options.columnNames.map(
                        (column) => this.escape(column),
                    )
                    if (
                        InstanceChecker.isSelectQueryBuilder(cte.queryBuilder)
                    ) {
                        if (
                            cte.queryBuilder.expressionMap.selects.length &&
                            cte.options.columnNames.length !==
                                cte.queryBuilder.expressionMap.selects.length
                        ) {
                            throw new TypeORMError(
                                `cte.options.columnNames length (${cte.options.columnNames.length}) doesn't match subquery select list length ${cte.queryBuilder.expressionMap.selects.length} (CTE: ${cte.alias})`,
                            )
                        }
                    }
                    cteHeader += `(${escapedColumnNames.join(", ")})`
                }
                const recursiveClause =
                    cte.options.recursive && databaseRequireRecusiveHint
                        ? "RECURSIVE"
                        : ""
                let materializeClause = ""
                if (
                    this.connection.driver.cteCapabilities.materializedHint &&
                    cte.options.materialized !== undefined
                ) {
                    materializeClause = cte.options.materialized
                        ? "MATERIALIZED"
                        : "NOT MATERIALIZED"
                }

                return [
                    recursiveClause,
                    cteHeader,
                    "AS",
                    materializeClause,
                    `(${cteBodyExpression})`,
                ]
                    .filter(Boolean)
                    .join(" ")
            },
        )

        return "WITH " + cteStrings.join(", ") + " "
    }

    /**
     * Creates "WHERE" condition for an in-ids condition.
     */
    protected getWhereInIdsCondition(
        ids: any | any[],
    ): ObjectLiteral | Brackets {
        const metadata = this.expressionMap.mainAlias!.metadata
        const normalized = (Array.isArray(ids) ? ids : [ids]).map((id) =>
            metadata.ensureEntityIdMap(id),
        )

        // using in(...ids) for single primary key entities
        if (!metadata.hasMultiplePrimaryKeys) {
            const primaryColumn = metadata.primaryColumns[0]

            // getEntityValue will try to transform `In`, it is a bug
            // todo: remove this transformer check after #2390 is fixed
            // This also fails for embedded & relation, so until that is fixed skip it.
            if (
                !primaryColumn.transformer &&
                !primaryColumn.relationMetadata &&
                !primaryColumn.embeddedMetadata
            ) {
                return {
                    [primaryColumn.propertyName]: In(
                        normalized.map((id) =>
                            primaryColumn.getEntityValue(id, false),
                        ),
                    ),
                }
            }
        }

        return new Brackets((qb) => {
            for (const data of normalized) {
                qb.orWhere(new Brackets((qb) => qb.where(data)))
            }
        })
    }

    protected getExistsCondition(subQuery: any): [string, any[]] {
        const query = subQuery
            .clone()
            .orderBy()
            .groupBy()
            .offset(undefined)
            .limit(undefined)
            .skip(undefined)
            .take(undefined)
            .select("1")
            .setOption("disable-global-order")

        return [`EXISTS (${query.getQuery()})`, query.getParameters()]
    }

    private findColumnsForPropertyPath(
        propertyPath: string,
    ): [Alias, string[], ColumnMetadata[]] {
        // Make a helper to iterate the entity & relations?
        // Use that to set the correct alias?  Or the other way around?

        // Start with the main alias with our property paths
        let alias = this.expressionMap.mainAlias
        const root: string[] = []
        const propertyPathParts = propertyPath.split(".")

        while (propertyPathParts.length > 1) {
            const part = propertyPathParts[0]

            if (!alias?.hasMetadata) {
                // If there's no metadata, we're wasting our time
                // and can't actually look any of this up.
                break
            }

            if (alias.metadata.hasEmbeddedWithPropertyPath(part)) {
                // If this is an embedded then we should combine the two as part of our lookup.
                // Instead of just breaking, we keep going with this in case there's an embedded/relation
                // inside an embedded.
                propertyPathParts.unshift(
                    `${propertyPathParts.shift()}.${propertyPathParts.shift()}`,
                )
                continue
            }

            if (alias.metadata.hasRelationWithPropertyPath(part)) {
                // If this is a relation then we should find the aliases
                // that match the relation & then continue further down
                // the property path
                const joinAttr = this.expressionMap.joinAttributes.find(
                    (joinAttr) => joinAttr.relationPropertyPath === part,
                )

                if (!joinAttr?.alias) {
                    const fullRelationPath =
                        root.length > 0 ? `${root.join(".")}.${part}` : part
                    throw new Error(
                        `Cannot find alias for relation at ${fullRelationPath}`,
                    )
                }

                alias = joinAttr.alias
                root.push(...part.split("."))
                propertyPathParts.shift()
                continue
            }

            break
        }

        if (!alias) {
            throw new Error(`Cannot find alias for property ${propertyPath}`)
        }

        // Remaining parts are combined back and used to find the actual property path
        const aliasPropertyPath = propertyPathParts.join(".")

        const columns =
            alias.metadata.findColumnsWithPropertyPath(aliasPropertyPath)

        if (!columns.length) {
            throw new EntityPropertyNotFoundError(propertyPath, alias.metadata)
        }

        return [alias, root, columns]
    }

    /**
     * Creates a property paths for a given ObjectLiteral.
     */
    protected createPropertyPath(
        metadata: EntityMetadata,
        entity: ObjectLiteral,
        prefix: string = "",
    ) {
        const paths: string[] = []

        for (const key of Object.keys(entity)) {
            const path = prefix ? `${prefix}.${key}` : key

            // There's times where we don't actually want to traverse deeper.
            // If the value is a `FindOperator`, or null, or not an object, then we don't, for example.
            if (
                entity[key] === null ||
                typeof entity[key] !== "object" ||
                InstanceChecker.isFindOperator(entity[key])
            ) {
                paths.push(path)
                continue
            }

            if (metadata.hasEmbeddedWithPropertyPath(path)) {
                const subPaths = this.createPropertyPath(
                    metadata,
                    entity[key],
                    path,
                )
                paths.push(...subPaths)
                continue
            }

            if (metadata.hasRelationWithPropertyPath(path)) {
                const relation = metadata.findRelationWithPropertyPath(path)!

                // There's also cases where we don't want to return back all of the properties.
                // These handles the situation where someone passes the model & we don't need to make
                // a HUGE `where` to uniquely look up the entity.

                // In the case of a *-to-one, there's only ever one possible entity on the other side
                // so if the join columns are all defined we can return just the relation itself
                // because it will fetch only the join columns and do the lookup.
                if (
                    relation.relationType === "one-to-one" ||
                    relation.relationType === "many-to-one"
                ) {
                    const joinColumns = relation.joinColumns
                        .map((j) => j.referencedColumn)
                        .filter((j): j is ColumnMetadata => !!j)

                    const hasAllJoinColumns =
                        joinColumns.length > 0 &&
                        joinColumns.every((column) =>
                            column.getEntityValue(entity[key], false),
                        )

                    if (hasAllJoinColumns) {
                        paths.push(path)
                        continue
                    }
                }

                if (
                    relation.relationType === "one-to-many" ||
                    relation.relationType === "many-to-many"
                ) {
                    throw new Error(
                        `Cannot query across ${relation.relationType} for property ${path}`,
                    )
                }

                // For any other case, if the `entity[key]` contains all of the primary keys we can do a
                // lookup via these.  We don't need to look up via any other values 'cause these are
                // the unique primary keys.
                // This handles the situation where someone passes the model & we don't need to make
                // a HUGE where.
                const primaryColumns =
                    relation.inverseEntityMetadata.primaryColumns
                const hasAllPrimaryKeys =
                    primaryColumns.length > 0 &&
                    primaryColumns.every((column) =>
                        column.getEntityValue(entity[key], false),
                    )

                if (hasAllPrimaryKeys) {
                    const subPaths = primaryColumns.map(
                        (column) => `${path}.${column.propertyPath}`,
                    )
                    paths.push(...subPaths)
                    continue
                }

                // If nothing else, just return every property that's being passed to us.
                const subPaths = this.createPropertyPath(
                    relation.inverseEntityMetadata,
                    entity[key],
                ).map((p) => `${path}.${p}`)
                paths.push(...subPaths)
                continue
            }

            paths.push(path)
        }

        return paths
    }

    protected *getPredicates(where: ObjectLiteral) {
        if (this.expressionMap.mainAlias!.hasMetadata) {
            const propertyPaths = this.createPropertyPath(
                this.expressionMap.mainAlias!.metadata,
                where,
            )

            for (const propertyPath of propertyPaths) {
                const [alias, aliasPropertyPath, columns] =
                    this.findColumnsForPropertyPath(propertyPath)

                for (const column of columns) {
                    let containedWhere = where

                    for (const part of aliasPropertyPath) {
                        if (!containedWhere || !(part in containedWhere)) {
                            containedWhere = {}
                            break
                        }

                        containedWhere = containedWhere[part]
                    }

                    // Use the correct alias & the property path from the column
                    const aliasPath = this.expressionMap
                        .aliasNamePrefixingEnabled
                        ? `${alias.name}.${column.propertyPath}`
                        : column.propertyPath

                    const parameterValue = column.getEntityValue(
                        containedWhere,
                        true,
                    )

                    yield [aliasPath, parameterValue]
                }
            }
        } else {
            for (const key of Object.keys(where)) {
                const parameterValue = where[key]
                const aliasPath = this.expressionMap.aliasNamePrefixingEnabled
                    ? `${this.alias}.${key}`
                    : key

                yield [aliasPath, parameterValue]
            }
        }
    }

    protected getWherePredicateCondition(
        aliasPath: string,
        parameterValue: any,
    ): WhereClauseCondition {
        if (InstanceChecker.isFindOperator(parameterValue)) {
            const parameters: any[] = []
            if (parameterValue.useParameter) {
                if (parameterValue.objectLiteralParameters) {
                    this.setParameters(parameterValue.objectLiteralParameters)
                } else if (parameterValue.multipleParameters) {
                    for (const v of parameterValue.value) {
                        parameters.push(this.createParameter(v))
                    }
                } else {
                    parameters.push(this.createParameter(parameterValue.value))
                }
            }

            if (parameterValue.type === "raw") {
                if (parameterValue.getSql) {
                    return parameterValue.getSql(aliasPath)
                } else {
                    return {
                        operator: "equal",
                        parameters: [aliasPath, parameterValue.value],
                    }
                }
            } else if (parameterValue.type === "not") {
                if (parameterValue.child) {
                    return {
                        operator: parameterValue.type,
                        condition: this.getWherePredicateCondition(
                            aliasPath,
                            parameterValue.child,
                        ),
                    }
                } else {
                    return {
                        operator: "notEqual",
                        parameters: [aliasPath, ...parameters],
                    }
                }
            } else if (parameterValue.type === "and") {
                const values: FindOperator<any>[] = parameterValue.value

                return {
                    operator: parameterValue.type,
                    parameters: values.map((operator) =>
                        this.createWhereConditionExpression(
                            this.getWherePredicateCondition(
                                aliasPath,
                                operator,
                            ),
                        ),
                    ),
                }
            } else if (parameterValue.type === "or") {
                const values: FindOperator<any>[] = parameterValue.value

                return {
                    operator: parameterValue.type,
                    parameters: values.map((operator) =>
                        this.createWhereConditionExpression(
                            this.getWherePredicateCondition(
                                aliasPath,
                                operator,
                            ),
                        ),
                    ),
                }
            } else {
                return {
                    operator: parameterValue.type,
                    parameters: [aliasPath, ...parameters],
                }
            }
        } else if (parameterValue === null) {
            if (this.expressionMap.treatJsNullAsSqlNull) {
                return {
                    operator: "isNull",
                    parameters: [aliasPath],
                }
            }
        } else if (parameterValue === undefined) {
            if (this.expressionMap.throwOnUndefinedInFind) {
                throw new TypeORMError(
                    `Undefined value encountered in property '${aliasPath}' of the find operation. ` +
                        `Set 'throwOnUndefinedInFind' to false in connection options to skip properties with undefined values.`,
                )
            }
        }

        return {
            operator: "equal",
            parameters: [aliasPath, this.createParameter(parameterValue)],
        }
    }

    protected getWhereCondition(
        where:
            | string
            | ((qb: this) => string)
            | Brackets
            | NotBrackets
            | ObjectLiteral
            | ObjectLiteral[],
    ): WhereClauseCondition {
        if (typeof where === "string") {
            return where
        }

        if (InstanceChecker.isBrackets(where)) {
            const whereQueryBuilder = this.createQueryBuilder()

            whereQueryBuilder.parentQueryBuilder = this

            whereQueryBuilder.expressionMap.mainAlias =
                this.expressionMap.mainAlias
            whereQueryBuilder.expressionMap.aliasNamePrefixingEnabled =
                this.expressionMap.aliasNamePrefixingEnabled
            whereQueryBuilder.expressionMap.parameters =
                this.expressionMap.parameters
            whereQueryBuilder.expressionMap.nativeParameters =
                this.expressionMap.nativeParameters

            whereQueryBuilder.expressionMap.wheres = []

            where.whereFactory(whereQueryBuilder as any)

            return {
                operator: InstanceChecker.isNotBrackets(where)
                    ? "not"
                    : "brackets",
                condition: whereQueryBuilder.expressionMap.wheres,
            }
        }

        if (typeof where === "function") {
            return where(this)
        }

        const wheres: ObjectLiteral[] = Array.isArray(where) ? where : [where]
        const clauses: WhereClause[] = []

        for (const where of wheres) {
            const conditions: WhereClauseCondition = []

            // Filter the conditions and set up the parameter values
            for (const [aliasPath, parameterValue] of this.getPredicates(
                where,
            )) {
                conditions.push({
                    type: "and",
                    condition: this.getWherePredicateCondition(
                        aliasPath,
                        parameterValue,
                    ),
                })
            }

            clauses.push({ type: "or", condition: conditions })
        }

        if (clauses.length === 1) {
            return clauses[0].condition
        }

        return clauses
    }

    /**
     * Creates a query builder used to execute sql queries inside this query builder.
     */
    protected obtainQueryRunner() {
        return this.queryRunner || this.connection.createQueryRunner()
    }

    protected hasCommonTableExpressions(): boolean {
        return this.expressionMap.commonTableExpressions.length > 0
    }
}

typeorm / typeorm / 15219332477

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