14796576772

Committed 02 May 2025 01:52PM UTC coverage: 45.367% (-30.9%) from 76.309%

Build # 14796576772

Build Type

Pull #11434

github

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web-flow

Commit Message

Merge ec4ce2d00 into fadad1a74

Pull Request Pull Request #11434: feat: release PR releases using pkg.pr.new

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67.31

/src/query-builder/RelationLoader.ts

import { DataSource } from "../data-source/DataSource"
import { ObjectLiteral } from "../common/ObjectLiteral"
import { QueryRunner } from "../query-runner/QueryRunner"
import { RelationMetadata } from "../metadata/RelationMetadata"
import { FindOptionsUtils } from "../find-options/FindOptionsUtils"
import { SelectQueryBuilder } from "./SelectQueryBuilder"

/**
 * Wraps entities and creates getters/setters for their relations
 * to be able to lazily load relations when accessing these relations.
 */
export class RelationLoader {
    // -------------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------------

    constructor(private connection: DataSource) {}

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

    /**
     * Loads relation data for the given entity and its relation.
     */
    load(
        relation: RelationMetadata,
        entityOrEntities: ObjectLiteral | ObjectLiteral[],
        queryRunner?: QueryRunner,
        queryBuilder?: SelectQueryBuilder<any>,
    ): Promise<any[]> {
        // todo: check all places where it uses non array
        if (queryRunner && queryRunner.isReleased) queryRunner = undefined // get new one if already closed
        if (relation.isManyToOne || relation.isOneToOneOwner) {
            return this.loadManyToOneOrOneToOneOwner(
                relation,
                entityOrEntities,
                queryRunner,
                queryBuilder,
            )
        } else if (relation.isOneToMany || relation.isOneToOneNotOwner) {
            return this.loadOneToManyOrOneToOneNotOwner(
                relation,
                entityOrEntities,
                queryRunner,
                queryBuilder,
            )
        } else if (relation.isManyToManyOwner) {
            return this.loadManyToManyOwner(
                relation,
                entityOrEntities,
                queryRunner,
                queryBuilder,
            )
        } else {
            // many-to-many non owner
            return this.loadManyToManyNotOwner(
                relation,
                entityOrEntities,
                queryRunner,
                queryBuilder,
            )
        }
    }

    /**
     * Loads data for many-to-one and one-to-one owner relations.
     *
     * (ow) post.category<=>category.post
     * loaded: category from post
     * example: SELECT category.id AS category_id, category.name AS category_name FROM category category
     *              INNER JOIN post Post ON Post.category=category.id WHERE Post.id=1
     */
    loadManyToOneOrOneToOneOwner(
        relation: RelationMetadata,
        entityOrEntities: ObjectLiteral | ObjectLiteral[],
        queryRunner?: QueryRunner,
        queryBuilder?: SelectQueryBuilder<any>,
    ): Promise<any> {
        const entities = Array.isArray(entityOrEntities)
            ? entityOrEntities
            : [entityOrEntities]

        const joinAliasName = relation.entityMetadata.name
        const qb = queryBuilder
            ? queryBuilder
            : this.connection
                  .createQueryBuilder(queryRunner)
                  .select(relation.propertyName) // category
                  .from(relation.type, relation.propertyName)

        const mainAlias = qb.expressionMap.mainAlias!.name
        const columns = relation.entityMetadata.primaryColumns
        const joinColumns = relation.isOwning
            ? relation.joinColumns
            : relation.inverseRelation!.joinColumns
        const conditions = joinColumns
            .map((joinColumn) => {
                return `${relation.entityMetadata.name}.${
                    joinColumn.propertyName
                } = ${mainAlias}.${joinColumn.referencedColumn!.propertyName}`
            })
            .join(" AND ")

        qb.innerJoin(
            relation.entityMetadata.target as Function,
            joinAliasName,
            conditions,
        )

        if (columns.length === 1) {
            qb.where(
                `${joinAliasName}.${columns[0].propertyPath} IN (:...${
                    joinAliasName + "_" + columns[0].propertyName
                })`,
            )
            qb.setParameter(
                joinAliasName + "_" + columns[0].propertyName,
                entities.map((entity) =>
                    columns[0].getEntityValue(entity, true),
                ),
            )
        } else {
            const condition = entities
                .map((entity, entityIndex) => {
                    return columns
                        .map((column, columnIndex) => {
                            const paramName =
                                joinAliasName +
                                "_entity_" +
                                entityIndex +
                                "_" +
                                columnIndex
                            qb.setParameter(
                                paramName,
                                column.getEntityValue(entity, true),
                            )
                            return (
                                joinAliasName +
                                "." +
                                column.propertyPath +
                                " = :" +
                                paramName
                            )
                        })
                        .join(" AND ")
                })
                .map((condition) => "(" + condition + ")")
                .join(" OR ")
            qb.where(condition)
        }

        FindOptionsUtils.joinEagerRelations(
            qb,
            qb.alias,
            qb.expressionMap.mainAlias!.metadata,
        )

        return qb.getMany()
        // return qb.getOne(); todo: fix all usages
    }

    /**
     * Loads data for one-to-many and one-to-one not owner relations.
     *
     * SELECT post
     * FROM post post
     * WHERE post.[joinColumn.name] = entity[joinColumn.referencedColumn]
     */
    loadOneToManyOrOneToOneNotOwner(
        relation: RelationMetadata,
        entityOrEntities: ObjectLiteral | ObjectLiteral[],
        queryRunner?: QueryRunner,
        queryBuilder?: SelectQueryBuilder<any>,
    ): Promise<any> {
        const entities = Array.isArray(entityOrEntities)
            ? entityOrEntities
            : [entityOrEntities]
        const columns = relation.inverseRelation!.joinColumns
        const qb = queryBuilder
            ? queryBuilder
            : this.connection
                  .createQueryBuilder(queryRunner)
                  .select(relation.propertyName)
                  .from(
                      relation.inverseRelation!.entityMetadata.target,
                      relation.propertyName,
                  )

        const aliasName = qb.expressionMap.mainAlias!.name

        if (columns.length === 1) {
            qb.where(
                `${aliasName}.${columns[0].propertyPath} IN (:...${
                    aliasName + "_" + columns[0].propertyName
                })`,
            )
            qb.setParameter(
                aliasName + "_" + columns[0].propertyName,
                entities.map((entity) =>
                    columns[0].referencedColumn!.getEntityValue(entity, true),
                ),
            )
        } else {
            const condition = entities
                .map((entity, entityIndex) => {
                    return columns
                        .map((column, columnIndex) => {
                            const paramName =
                                aliasName +
                                "_entity_" +
                                entityIndex +
                                "_" +
                                columnIndex
                            qb.setParameter(
                                paramName,
                                column.referencedColumn!.getEntityValue(
                                    entity,
                                    true,
                                ),
                            )
                            return (
                                aliasName +
                                "." +
                                column.propertyPath +
                                " = :" +
                                paramName
                            )
                        })
                        .join(" AND ")
                })
                .map((condition) => "(" + condition + ")")
                .join(" OR ")
            qb.where(condition)
        }

        FindOptionsUtils.joinEagerRelations(
            qb,
            qb.alias,
            qb.expressionMap.mainAlias!.metadata,
        )

        return qb.getMany()
        // return relation.isOneToMany ? qb.getMany() : qb.getOne(); todo: fix all usages
    }

    /**
     * Loads data for many-to-many owner relations.
     *
     * SELECT category
     * FROM category category
     * INNER JOIN post_categories post_categories
     * ON post_categories.postId = :postId
     * AND post_categories.categoryId = category.id
     */
    loadManyToManyOwner(
        relation: RelationMetadata,
        entityOrEntities: ObjectLiteral | ObjectLiteral[],
        queryRunner?: QueryRunner,
        queryBuilder?: SelectQueryBuilder<any>,
    ): Promise<any> {
        const entities = Array.isArray(entityOrEntities)
            ? entityOrEntities
            : [entityOrEntities]
        const parameters = relation.joinColumns.reduce(
            (parameters, joinColumn) => {
                parameters[joinColumn.propertyName] = entities.map((entity) =>
                    joinColumn.referencedColumn!.getEntityValue(entity, true),
                )
                return parameters
            },
            {} as ObjectLiteral,
        )

        const qb = queryBuilder
            ? queryBuilder
            : this.connection
                  .createQueryBuilder(queryRunner)
                  .select(relation.propertyName)
                  .from(relation.type, relation.propertyName)

        const mainAlias = qb.expressionMap.mainAlias!.name
        const joinAlias = relation.junctionEntityMetadata!.tableName
        const joinColumnConditions = relation.joinColumns.map((joinColumn) => {
            return `${joinAlias}.${joinColumn.propertyName} IN (:...${joinColumn.propertyName})`
        })
        const inverseJoinColumnConditions = relation.inverseJoinColumns.map(
            (inverseJoinColumn) => {
                return `${joinAlias}.${
                    inverseJoinColumn.propertyName
                }=${mainAlias}.${
                    inverseJoinColumn.referencedColumn!.propertyName
                }`
            },
        )

        qb.innerJoin(
            joinAlias,
            joinAlias,
            [...joinColumnConditions, ...inverseJoinColumnConditions].join(
                " AND ",
            ),
        ).setParameters(parameters)

        FindOptionsUtils.joinEagerRelations(
            qb,
            qb.alias,
            qb.expressionMap.mainAlias!.metadata,
        )

        return qb.getMany()
    }

    /**
     * Loads data for many-to-many not owner relations.
     *
     * SELECT post
     * FROM post post
     * INNER JOIN post_categories post_categories
     * ON post_categories.postId = post.id
     * AND post_categories.categoryId = post_categories.categoryId
     */
    loadManyToManyNotOwner(
        relation: RelationMetadata,
        entityOrEntities: ObjectLiteral | ObjectLiteral[],
        queryRunner?: QueryRunner,
        queryBuilder?: SelectQueryBuilder<any>,
    ): Promise<any> {
        const entities = Array.isArray(entityOrEntities)
            ? entityOrEntities
            : [entityOrEntities]

        const qb = queryBuilder
            ? queryBuilder
            : this.connection
                  .createQueryBuilder(queryRunner)
                  .select(relation.propertyName)
                  .from(relation.type, relation.propertyName)

        const mainAlias = qb.expressionMap.mainAlias!.name
        const joinAlias = relation.junctionEntityMetadata!.tableName
        const joinColumnConditions = relation.inverseRelation!.joinColumns.map(
            (joinColumn) => {
                return `${joinAlias}.${
                    joinColumn.propertyName
                } = ${mainAlias}.${joinColumn.referencedColumn!.propertyName}`
            },
        )
        const inverseJoinColumnConditions =
            relation.inverseRelation!.inverseJoinColumns.map(
                (inverseJoinColumn) => {
                    return `${joinAlias}.${inverseJoinColumn.propertyName} IN (:...${inverseJoinColumn.propertyName})`
                },
            )
        const parameters = relation.inverseRelation!.inverseJoinColumns.reduce(
            (parameters, joinColumn) => {
                parameters[joinColumn.propertyName] = entities.map((entity) =>
                    joinColumn.referencedColumn!.getEntityValue(entity, true),
                )
                return parameters
            },
            {} as ObjectLiteral,
        )

        qb.innerJoin(
            joinAlias,
            joinAlias,
            [...joinColumnConditions, ...inverseJoinColumnConditions].join(
                " AND ",
            ),
        ).setParameters(parameters)

        FindOptionsUtils.joinEagerRelations(
            qb,
            qb.alias,
            qb.expressionMap.mainAlias!.metadata,
        )

        return qb.getMany()
    }

    /**
     * Wraps given entity and creates getters/setters for its given relation
     * to be able to lazily load data when accessing this relation.
     */
    enableLazyLoad(
        relation: RelationMetadata,
        entity: ObjectLiteral,
        queryRunner?: QueryRunner,
    ) {
        const relationLoader = this
        const dataIndex = "__" + relation.propertyName + "__" // in what property of the entity loaded data will be stored
        const promiseIndex = "__promise_" + relation.propertyName + "__" // in what property of the entity loading promise will be stored
        const resolveIndex = "__has_" + relation.propertyName + "__" // indicates if relation data already was loaded or not, we need this flag if loaded data is empty

        const setData = (entity: ObjectLiteral, value: any) => {
            entity[dataIndex] = value
            entity[resolveIndex] = true
            delete entity[promiseIndex]
            return value
        }
        const setPromise = (entity: ObjectLiteral, value: Promise<any>) => {
            delete entity[resolveIndex]
            delete entity[dataIndex]
            entity[promiseIndex] = value
            value.then(
                // ensure different value is not assigned yet
                (result) =>
                    entity[promiseIndex] === value
                        ? setData(entity, result)
                        : result,
            )
            return value
        }

        Object.defineProperty(entity, relation.propertyName, {
            get: function () {
                if (
                    this[resolveIndex] === true ||
                    this[dataIndex] !== undefined
                )
                    // if related data already was loaded then simply return it
                    return Promise.resolve(this[dataIndex])

                if (this[promiseIndex])
                    // if related data is loading then return a promise relationLoader loads it
                    return this[promiseIndex]

                // nothing is loaded yet, load relation data and save it in the model once they are loaded
                const loader = relationLoader
                    .load(relation, this, queryRunner)
                    .then((result) =>
                        relation.isOneToOne || relation.isManyToOne
                            ? result.length === 0
                                ? null
                                : result[0]
                            : result,
                    )
                return setPromise(this, loader)
            },
            set: function (value: any | Promise<any>) {
                if (value instanceof Promise) {
                    // if set data is a promise then wait for its resolve and save in the object
                    setPromise(this, value)
                } else {
                    // if its direct data set (non promise, probably not safe-typed)
                    setData(this, value)
                }
            },
            configurable: true,
            enumerable: false,
        })
    }
}

1	import { DataSource } from "../data-source/DataSource"
2	import { ObjectLiteral } from "../common/ObjectLiteral"
3	import { QueryRunner } from "../query-runner/QueryRunner"
4	import { RelationMetadata } from "../metadata/RelationMetadata"
5	import { FindOptionsUtils } from "../find-options/FindOptionsUtils"	4✔
6	import { SelectQueryBuilder } from "./SelectQueryBuilder"
7
8	/**
9	* Wraps entities and creates getters/setters for their relations
10	* to be able to lazily load relations when accessing these relations.
11	*/
12	export class RelationLoader {	4✔
13	// -------------------------------------------------------------------------
14	// Constructor
15	// -------------------------------------------------------------------------
16
17	constructor(private connection: DataSource) {}	1,852✔
18
19	// -------------------------------------------------------------------------
20	// Public Methods
21	// -------------------------------------------------------------------------
22
23	/**
24	* Loads relation data for the given entity and its relation.
25	*/
26	load(
27	relation: RelationMetadata,
28	entityOrEntities: ObjectLiteral \| ObjectLiteral[],
29	queryRunner?: QueryRunner,
30	queryBuilder?: SelectQueryBuilder<any>,
31	): Promise<any[]> {
32	// todo: check all places where it uses non array
33	if (queryRunner && queryRunner.isReleased) queryRunner = undefined // get new one if already closed	72!
34	if (relation.isManyToOne \|\| relation.isOneToOneOwner) {	72✔
35	return this.loadManyToOneOrOneToOneOwner(	48✔
36	relation,
37	entityOrEntities,
38	queryRunner,
39	queryBuilder,
40	)
41	} else if (relation.isOneToMany \|\| relation.isOneToOneNotOwner) {	24✔
42	return this.loadOneToManyOrOneToOneNotOwner(	12✔
43	relation,
44	entityOrEntities,
45	queryRunner,
46	queryBuilder,
47	)
48	} else if (relation.isManyToManyOwner) {	12!
49	return this.loadManyToManyOwner(	12✔
50	relation,
51	entityOrEntities,
52	queryRunner,
53	queryBuilder,
54	)
55	} else {
56	// many-to-many non owner
57	return this.loadManyToManyNotOwner(	×
58	relation,
59	entityOrEntities,
60	queryRunner,
61	queryBuilder,
62	)
63	}
64	}
65
66	/**
67	* Loads data for many-to-one and one-to-one owner relations.
68	*
69	* (ow) post.category<=>category.post
70	* loaded: category from post
71	* example: SELECT category.id AS category_id, category.name AS category_name FROM category category
72	* INNER JOIN post Post ON Post.category=category.id WHERE Post.id=1
73	*/
74	loadManyToOneOrOneToOneOwner(
75	relation: RelationMetadata,
76	entityOrEntities: ObjectLiteral \| ObjectLiteral[],
77	queryRunner?: QueryRunner,
78	queryBuilder?: SelectQueryBuilder<any>,
79	): Promise<any> {
80	const entities = Array.isArray(entityOrEntities)	48!
81	? entityOrEntities
82	: [entityOrEntities]
83
84	const joinAliasName = relation.entityMetadata.name	48✔
85	const qb = queryBuilder	48!
86	? queryBuilder
87	: this.connection
88	.createQueryBuilder(queryRunner)
89	.select(relation.propertyName) // category
90	.from(relation.type, relation.propertyName)
91
92	const mainAlias = qb.expressionMap.mainAlias!.name	48✔
93	const columns = relation.entityMetadata.primaryColumns	48✔
94	const joinColumns = relation.isOwning	48!
95	? relation.joinColumns
96	: relation.inverseRelation!.joinColumns
97	const conditions = joinColumns	48✔
98	.map((joinColumn) => {
99	return `${relation.entityMetadata.name}.${	48✔
100	joinColumn.propertyName
101	} = ${mainAlias}.${joinColumn.referencedColumn!.propertyName}`
102	})
103	.join(" AND ")
104
105	qb.innerJoin(	48✔
106	relation.entityMetadata.target as Function,
107	joinAliasName,
108	conditions,
109	)
110
111	if (columns.length === 1) {	48!
112	qb.where(	48✔
113	`${joinAliasName}.${columns[0].propertyPath} IN (:...${
114	joinAliasName + "_" + columns[0].propertyName
115	})`,
116	)
117	qb.setParameter(	48✔
118	joinAliasName + "_" + columns[0].propertyName,
119	entities.map((entity) =>
120	columns[0].getEntityValue(entity, true),	48✔
121	),
122	)
123	} else {
124	const condition = entities	×
125	.map((entity, entityIndex) => {
126	return columns	×
127	.map((column, columnIndex) => {
128	const paramName =
129	joinAliasName +	×
130	"_entity_" +
131	entityIndex +
132	"_" +
133	columnIndex
134	qb.setParameter(	×
135	paramName,
136	column.getEntityValue(entity, true),
137	)
138	return (	×
139	joinAliasName +
140	"." +
141	column.propertyPath +
142	" = :" +
143	paramName
144	)
145	})
146	.join(" AND ")
147	})
148	.map((condition) => "(" + condition + ")")	×
149	.join(" OR ")
150	qb.where(condition)	×
151	}
152
153	FindOptionsUtils.joinEagerRelations(	48✔
154	qb,
155	qb.alias,
156	qb.expressionMap.mainAlias!.metadata,
157	)
158
159	return qb.getMany()	48✔
160	// return qb.getOne(); todo: fix all usages
161	}
162
163	/**
164	* Loads data for one-to-many and one-to-one not owner relations.
165	*
166	* SELECT post
167	* FROM post post
168	* WHERE post.[joinColumn.name] = entity[joinColumn.referencedColumn]
169	*/
170	loadOneToManyOrOneToOneNotOwner(
171	relation: RelationMetadata,
172	entityOrEntities: ObjectLiteral \| ObjectLiteral[],
173	queryRunner?: QueryRunner,
174	queryBuilder?: SelectQueryBuilder<any>,
175	): Promise<any> {
176	const entities = Array.isArray(entityOrEntities)	12!
177	? entityOrEntities
178	: [entityOrEntities]
179	const columns = relation.inverseRelation!.joinColumns	12✔
180	const qb = queryBuilder	12!
181	? queryBuilder
182	: this.connection
183	.createQueryBuilder(queryRunner)
184	.select(relation.propertyName)
185	.from(
186	relation.inverseRelation!.entityMetadata.target,
187	relation.propertyName,
188	)
189
190	const aliasName = qb.expressionMap.mainAlias!.name	12✔
191
192	if (columns.length === 1) {	12!
193	qb.where(	12✔
194	`${aliasName}.${columns[0].propertyPath} IN (:...${
195	aliasName + "_" + columns[0].propertyName
196	})`,
197	)
198	qb.setParameter(	12✔
199	aliasName + "_" + columns[0].propertyName,
200	entities.map((entity) =>
201	columns[0].referencedColumn!.getEntityValue(entity, true),	12✔
202	),
203	)
204	} else {
205	const condition = entities	×
206	.map((entity, entityIndex) => {
207	return columns	×
208	.map((column, columnIndex) => {
209	const paramName =
210	aliasName +	×
211	"_entity_" +
212	entityIndex +
213	"_" +
214	columnIndex
215	qb.setParameter(	×
216	paramName,
217	column.referencedColumn!.getEntityValue(
218	entity,
219	true,
220	),
221	)
222	return (	×
223	aliasName +
224	"." +
225	column.propertyPath +
226	" = :" +
227	paramName
228	)
229	})
230	.join(" AND ")
231	})
232	.map((condition) => "(" + condition + ")")	×
233	.join(" OR ")
234	qb.where(condition)	×
235	}
236
237	FindOptionsUtils.joinEagerRelations(	12✔
238	qb,
239	qb.alias,
240	qb.expressionMap.mainAlias!.metadata,
241	)
242
243	return qb.getMany()	12✔
244	// return relation.isOneToMany ? qb.getMany() : qb.getOne(); todo: fix all usages
245	}
246
247	/**
248	* Loads data for many-to-many owner relations.
249	*
250	* SELECT category
251	* FROM category category
252	* INNER JOIN post_categories post_categories
253	* ON post_categories.postId = :postId
254	* AND post_categories.categoryId = category.id
255	*/
256	loadManyToManyOwner(
257	relation: RelationMetadata,
258	entityOrEntities: ObjectLiteral \| ObjectLiteral[],
259	queryRunner?: QueryRunner,
260	queryBuilder?: SelectQueryBuilder<any>,
261	): Promise<any> {
262	const entities = Array.isArray(entityOrEntities)	12!
263	? entityOrEntities
264	: [entityOrEntities]
265	const parameters = relation.joinColumns.reduce(	12✔
266	(parameters, joinColumn) => {
267	parameters[joinColumn.propertyName] = entities.map((entity) =>	12✔
268	joinColumn.referencedColumn!.getEntityValue(entity, true),	12✔
269	)
270	return parameters	12✔
271	},
272	{} as ObjectLiteral,
273	)
274
275	const qb = queryBuilder	12!
276	? queryBuilder
277	: this.connection
278	.createQueryBuilder(queryRunner)
279	.select(relation.propertyName)
280	.from(relation.type, relation.propertyName)
281
282	const mainAlias = qb.expressionMap.mainAlias!.name	12✔
283	const joinAlias = relation.junctionEntityMetadata!.tableName	12✔
284	const joinColumnConditions = relation.joinColumns.map((joinColumn) => {	12✔
285	return `${joinAlias}.${joinColumn.propertyName} IN (:...${joinColumn.propertyName})`	12✔
286	})
287	const inverseJoinColumnConditions = relation.inverseJoinColumns.map(	12✔
288	(inverseJoinColumn) => {
289	return `${joinAlias}.${	12✔
290	inverseJoinColumn.propertyName
291	}=${mainAlias}.${
292	inverseJoinColumn.referencedColumn!.propertyName
293	}`
294	},
295	)
296
297	qb.innerJoin(	12✔
298	joinAlias,
299	joinAlias,
300	[...joinColumnConditions, ...inverseJoinColumnConditions].join(
301	" AND ",
302	),
303	).setParameters(parameters)
304
305	FindOptionsUtils.joinEagerRelations(	12✔
306	qb,
307	qb.alias,
308	qb.expressionMap.mainAlias!.metadata,
309	)
310
311	return qb.getMany()	12✔
312	}
313
314	/**
315	* Loads data for many-to-many not owner relations.
316	*
317	* SELECT post
318	* FROM post post
319	* INNER JOIN post_categories post_categories
320	* ON post_categories.postId = post.id
321	* AND post_categories.categoryId = post_categories.categoryId
322	*/
323	loadManyToManyNotOwner(
324	relation: RelationMetadata,
325	entityOrEntities: ObjectLiteral \| ObjectLiteral[],
326	queryRunner?: QueryRunner,
327	queryBuilder?: SelectQueryBuilder<any>,
328	): Promise<any> {
329	const entities = Array.isArray(entityOrEntities)	×
330	? entityOrEntities
331	: [entityOrEntities]
332
333	const qb = queryBuilder	×
334	? queryBuilder
335	: this.connection
336	.createQueryBuilder(queryRunner)
337	.select(relation.propertyName)
338	.from(relation.type, relation.propertyName)
339
340	const mainAlias = qb.expressionMap.mainAlias!.name	×
341	const joinAlias = relation.junctionEntityMetadata!.tableName	×
342	const joinColumnConditions = relation.inverseRelation!.joinColumns.map(	×
343	(joinColumn) => {
344	return `${joinAlias}.${	×
345	joinColumn.propertyName
346	} = ${mainAlias}.${joinColumn.referencedColumn!.propertyName}`
347	},
348	)
349	const inverseJoinColumnConditions =
350	relation.inverseRelation!.inverseJoinColumns.map(	×
351	(inverseJoinColumn) => {
352	return `${joinAlias}.${inverseJoinColumn.propertyName} IN (:...${inverseJoinColumn.propertyName})`	×
353	},
354	)
355	const parameters = relation.inverseRelation!.inverseJoinColumns.reduce(	×
356	(parameters, joinColumn) => {
357	parameters[joinColumn.propertyName] = entities.map((entity) =>	×
358	joinColumn.referencedColumn!.getEntityValue(entity, true),	×
359	)
360	return parameters	×
361	},
362	{} as ObjectLiteral,
363	)
364
365	qb.innerJoin(	×
366	joinAlias,
367	joinAlias,
368	[...joinColumnConditions, ...inverseJoinColumnConditions].join(
369	" AND ",
370	),
371	).setParameters(parameters)
372
373	FindOptionsUtils.joinEagerRelations(	×
374	qb,
375	qb.alias,
376	qb.expressionMap.mainAlias!.metadata,
377	)
378
379	return qb.getMany()	×
380	}
381
382	/**
383	* Wraps given entity and creates getters/setters for its given relation
384	* to be able to lazily load data when accessing this relation.
385	*/
386	enableLazyLoad(
387	relation: RelationMetadata,
388	entity: ObjectLiteral,
389	queryRunner?: QueryRunner,
390	) {
391	const relationLoader = this	258✔
392	const dataIndex = "__" + relation.propertyName + "__" // in what property of the entity loaded data will be stored	258✔
393	const promiseIndex = "__promise_" + relation.propertyName + "__" // in what property of the entity loading promise will be stored	258✔
394	const resolveIndex = "__has_" + relation.propertyName + "__" // indicates if relation data already was loaded or not, we need this flag if loaded data is empty	258✔
395
396	const setData = (entity: ObjectLiteral, value: any) => {	258✔
397	entity[dataIndex] = value	36✔
398	entity[resolveIndex] = true	36✔
399	delete entity[promiseIndex]	36✔
400	return value	36✔
401	}
402	const setPromise = (entity: ObjectLiteral, value: Promise<any>) => {	258✔
403	delete entity[resolveIndex]	36✔
404	delete entity[dataIndex]	36✔
405	entity[promiseIndex] = value	36✔
406	value.then(	36✔
407	// ensure different value is not assigned yet
408	(result) =>
409	entity[promiseIndex] === value	36!
410	? setData(entity, result)
411	: result,
412	)
413	return value	36✔
414	}
415
416	Object.defineProperty(entity, relation.propertyName, {	258✔
417	get: function () {
418	if (	40✔
419	this[resolveIndex] === true \|\|	80✔
420	this[dataIndex] !== undefined
421	)
422	// if related data already was loaded then simply return it
423	return Promise.resolve(this[dataIndex])	16✔
424
425	if (this[promiseIndex])	24!
426	// if related data is loading then return a promise relationLoader loads it
427	return this[promiseIndex]	×
428
429	// nothing is loaded yet, load relation data and save it in the model once they are loaded
430	const loader = relationLoader	24✔
431	.load(relation, this, queryRunner)
432	.then((result) =>
433	relation.isOneToOne \|\| relation.isManyToOne	24✔
434	? result.length === 0	16✔
435	? null
436	: result[0]
437	: result,
438	)
439	return setPromise(this, loader)	24✔
440	},
441	set: function (value: any \| Promise<any>) {
442	if (value instanceof Promise) {	12!
443	// if set data is a promise then wait for its resolve and save in the object
444	setPromise(this, value)	12✔
445	} else {
446	// if its direct data set (non promise, probably not safe-typed)
447	setData(this, value)	×
448	}
449	},
450	configurable: true,
451	enumerable: false,
452	})
453	}
454	}

typeorm / typeorm / 14796576772

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