pulibrary / allsearch_api / 55f37a69-f198-45d6-96dc-4272aa3cb82c

Pull #415

circleci

Remove ActiveRecord-based LibraryDatabaseRecord class

This also improves the performance of loading Library Database metadata from Lib-jobs
by combining all creation into a single INSERT query, rather than running an INSERT
for each row in the CSV.

To confirm, I ran this benchmark before deleting the LibraryDatabaseRecord class:

```
Benchmark.ips do |b|
  library_database_repo = LibraryDatabaseRepository.new Rails.application.config.rom
  csv = CSV.read Rails.root.join('spec/fixtures/files/libjobs/library-databases.csv'), headers: true
  b.report('LibraryDatabaseRecord::new_from_csv') do
    csv.each { LibraryDatabaseRecord.new_from_csv(it)}
    library_database_repo.delete
  end

  b.report('LibraryDatabaseRepository#create_from_csv') do
    library_database_repo.create_from_csv csv
    library_database_repo.delete
  end

  b.compare!
end
```

Results:

```
Warming up --------------------------------------
LibraryDatabaseRecord::new_from_csv
                         3.000 i/100ms
LibraryDatabaseRepository#create_from_csv
                        10.000 i/100ms
Calculating -------------------------------------
LibraryDatabaseRecord::new_from_csv
                         28.764 (±27.8%) i/s   (34.77 ms/i) -    135.000 in   5.004122s
LibraryDatabaseRepository#create_from_csv
                        116.179 (±18.9%) i/s    (8.61 ms/i) -    560.000 in   5.031764s

Comparison:
LibraryDatabaseRepository#create_from_csv:      116.2 i/s
LibraryDatabaseRecord::new_from_csv:       28.8 i/s - 4.04x  slower
```

Closes #402

14 of 14 new or added lines in 2 files covered. (100.0%)

1040 of 1041 relevant lines covered (99.9%)

104.28 hits per line