Merge pull request #3952 from mikiher/query-performance

Improve book library page query performance on title, titleIgnorePrefix, and addedAt sort orders.

server/migrations/changelog.md

@@ -13,3 +13,4 @@ Please add a record of every database migration that you create to this file. Th
 | v2.17.5        | v2.17.5-remove-host-from-feed-urls           | removes the host (serverAddress) from URL columns in the feeds and feedEpisodes tables                        |
 | v2.17.6        | v2.17.6-share-add-isdownloadable             | Adds the isDownloadable column to the mediaItemShares table                                                   |
 | v2.17.7        | v2.17.7-add-indices                          | Adds indices to the libraryItems and books tables to reduce query times                                       |
+| v2.19.1        | v2.19.1-copy-title-to-library-items          | Copies title and titleIgnorePrefix to the libraryItems table, creates update triggers and indices             |

server/migrations/v2.19.1-copy-title-to-library-items.js

@@ -0,0 +1,164 @@
+const util = require('util')
+
+/**
+ * @typedef MigrationContext
+ * @property {import('sequelize').QueryInterface} queryInterface - a suquelize QueryInterface object.
+ * @property {import('../Logger')} logger - a Logger object.
+ *
+ * @typedef MigrationOptions
+ * @property {MigrationContext} context - an object containing the migration context.
+ */
+
+const migrationVersion = '2.19.1'
+const migrationName = `${migrationVersion}-copy-title-to-library-items`
+const loggerPrefix = `[${migrationVersion} migration]`
+
+/**
+ * This upward migration adds a title column to the libraryItems table, copies the title from the book to the libraryItem,
+ * and creates a new index on the title column. In addition it sets a trigger on the books table to update the title column
+ * in the libraryItems table when a book is updated.
+ *
+ * @param {MigrationOptions} options - an object containing the migration context.
+ * @returns {Promise<void>} - A promise that resolves when the migration is complete.
+ */
+async function up({ context: { queryInterface, logger } }) {
+  // Upwards migration script
+  logger.info(`${loggerPrefix} UPGRADE BEGIN: ${migrationName}`)
+
+  await addColumn(queryInterface, logger, 'libraryItems', 'title', { type: queryInterface.sequelize.Sequelize.STRING, allowNull: true })
+  await copyColumn(queryInterface, logger, 'books', 'title', 'id', 'libraryItems', 'title', 'mediaId')
+  await addTrigger(queryInterface, logger, 'books', 'title', 'id', 'libraryItems', 'title', 'mediaId')
+  await addIndex(queryInterface, logger, 'libraryItems', ['libraryId', 'mediaType', { name: 'title', collate: 'NOCASE' }])
+
+  await addColumn(queryInterface, logger, 'libraryItems', 'titleIgnorePrefix', { type: queryInterface.sequelize.Sequelize.STRING, allowNull: true })
+  await copyColumn(queryInterface, logger, 'books', 'titleIgnorePrefix', 'id', 'libraryItems', 'titleIgnorePrefix', 'mediaId')
+  await addTrigger(queryInterface, logger, 'books', 'titleIgnorePrefix', 'id', 'libraryItems', 'titleIgnorePrefix', 'mediaId')
+  await addIndex(queryInterface, logger, 'libraryItems', ['libraryId', 'mediaType', { name: 'titleIgnorePrefix', collate: 'NOCASE' }])
+
+  await addIndex(queryInterface, logger, 'libraryItems', ['libraryId', 'mediaType', 'createdAt'])
+
+  logger.info(`${loggerPrefix} UPGRADE END: ${migrationName}`)
+}
+
+/**
+ * This downward migration script removes the title column from the libraryItems table, removes the trigger on the books table,
+ * and removes the index on the title column.
+ *
+ * @param {MigrationOptions} options - an object containing the migration context.
+ * @returns {Promise<void>} - A promise that resolves when the migration is complete.
+ */
+async function down({ context: { queryInterface, logger } }) {
+  // Downward migration script
+  logger.info(`${loggerPrefix} DOWNGRADE BEGIN: ${migrationName}`)
+
+  await removeIndex(queryInterface, logger, 'libraryItems', ['libraryId', 'mediaType', 'title'])
+  await removeTrigger(queryInterface, logger, 'libraryItems', 'title')
+  await removeColumn(queryInterface, logger, 'libraryItems', 'title')
+
+  await removeIndex(queryInterface, logger, 'libraryItems', ['libraryId', 'mediaType', 'titleIgnorePrefix'])
+  await removeTrigger(queryInterface, logger, 'libraryItems', 'titleIgnorePrefix')
+  await removeColumn(queryInterface, logger, 'libraryItems', 'titleIgnorePrefix')
+
+  await removeIndex(queryInterface, logger, 'libraryItems', ['libraryId', 'mediaType', 'createdAt'])
+
+  logger.info(`${loggerPrefix} DOWNGRADE END: ${migrationName}`)
+}
+
+/**
+ * Utility function to add an index to a table. If the index already z`exists, it logs a message and continues.
+ *
+ * @param {import('sequelize').QueryInterface} queryInterface
+ * @param {import ('../Logger')} logger
+ * @param {string} tableName
+ * @param {string[]} columns
+ */
+async function addIndex(queryInterface, logger, tableName, columns) {
+  const columnString = columns.map((column) => util.inspect(column)).join(', ')
+  const indexName = convertToSnakeCase(`${tableName}_${columns.map((column) => (typeof column === 'string' ? column : column.name)).join('_')}`)
+  try {
+    logger.info(`${loggerPrefix} adding index on [${columnString}] to table ${tableName}. index name: ${indexName}"`)
+    await queryInterface.addIndex(tableName, columns)
+    logger.info(`${loggerPrefix} added index on [${columnString}] to table ${tableName}. index name: ${indexName}"`)
+  } catch (error) {
+    if (error.name === 'SequelizeDatabaseError' && error.message.includes('already exists')) {
+      logger.info(`${loggerPrefix} index [${columnString}] for table "${tableName}" already exists`)
+    } else {
+      throw error
+    }
+  }
+}
+
+/**
+ * Utility function to remove an index from a table.
+ * Sequelize implemets it using DROP INDEX IF EXISTS, so it won't throw an error if the index doesn't exist.
+ *
+ * @param {import('sequelize').QueryInterface} queryInterface
+ * @param {import ('../Logger')} logger
+ * @param {string} tableName
+ * @param {string[]} columns
+ */
+async function removeIndex(queryInterface, logger, tableName, columns) {
+  logger.info(`${loggerPrefix} removing index [${columns.join(', ')}] from table "${tableName}"`)
+  await queryInterface.removeIndex(tableName, columns)
+  logger.info(`${loggerPrefix} removed index [${columns.join(', ')}] from table "${tableName}"`)
+}
+
+async function addColumn(queryInterface, logger, table, column, options) {
+  logger.info(`${loggerPrefix} adding column "${column}" to table "${table}"`)
+  const tableDescription = await queryInterface.describeTable(table)
+  if (!tableDescription[column]) {
+    await queryInterface.addColumn(table, column, options)
+    logger.info(`${loggerPrefix} added column "${column}" to table "${table}"`)
+  } else {
+    logger.info(`${loggerPrefix} column "${column}" already exists in table "${table}"`)
+  }
+}
+
+async function removeColumn(queryInterface, logger, table, column) {
+  logger.info(`${loggerPrefix} removing column "${column}" from table "${table}"`)
+  await queryInterface.removeColumn(table, column)
+  logger.info(`${loggerPrefix} removed column "${column}" from table "${table}"`)
+}
+
+async function copyColumn(queryInterface, logger, sourceTable, sourceColumn, sourceIdColumn, targetTable, targetColumn, targetIdColumn) {
+  logger.info(`${loggerPrefix} copying column "${sourceColumn}" from table "${sourceTable}" to table "${targetTable}"`)
+  await queryInterface.sequelize.query(`
+    UPDATE ${targetTable}
+    SET ${targetColumn} = ${sourceTable}.${sourceColumn}
+    FROM ${sourceTable}
+    WHERE ${targetTable}.${targetIdColumn} = ${sourceTable}.${sourceIdColumn}
+  `)
+  logger.info(`${loggerPrefix} copied column "${sourceColumn}" from table "${sourceTable}" to table "${targetTable}"`)
+}
+
+async function addTrigger(queryInterface, logger, sourceTable, sourceColumn, sourceIdColumn, targetTable, targetColumn, targetIdColumn) {
+  logger.info(`${loggerPrefix} adding trigger to update ${targetTable}.${targetColumn} when ${sourceTable}.${sourceColumn} is updated`)
+  const triggerName = convertToSnakeCase(`update_${targetTable}_${targetColumn}`)
+
+  await queryInterface.sequelize.query(`DROP TRIGGER IF EXISTS ${triggerName}`)
+
+  await queryInterface.sequelize.query(`
+    CREATE TRIGGER ${triggerName}
+      AFTER UPDATE OF ${sourceColumn} ON ${sourceTable}
+      FOR EACH ROW
+      BEGIN
+        UPDATE ${targetTable}
+          SET ${targetColumn} = NEW.${sourceColumn}
+        WHERE ${targetTable}.${targetIdColumn} = NEW.${sourceIdColumn};
+      END;
+  `)
+  logger.info(`${loggerPrefix} added trigger to update ${targetTable}.${targetColumn} when ${sourceTable}.${sourceColumn} is updated`)
+}
+
+async function removeTrigger(queryInterface, logger, targetTable, targetColumn) {
+  logger.info(`${loggerPrefix} removing trigger to update ${targetTable}.${targetColumn}`)
+  const triggerName = convertToSnakeCase(`update_${targetTable}_${targetColumn}`)
+  await queryInterface.sequelize.query(`DROP TRIGGER IF EXISTS ${triggerName}`)
+  logger.info(`${loggerPrefix} removed trigger to update ${targetTable}.${targetColumn}`)
+}
+
+function convertToSnakeCase(str) {
+  return str.replace(/([A-Z])/g, '_$1').toLowerCase()
+}
+
+module.exports = { up, down }

server/models/Book.js

@@ -3,6 +3,7 @@ const Logger = require('../Logger')
 const { getTitlePrefixAtEnd, getTitleIgnorePrefix } = require('../utils')
 const parseNameString = require('../utils/parsers/parseNameString')
 const htmlSanitizer = require('../utils/htmlSanitizer')
+const libraryItemsBookFilters = require('../utils/queries/libraryItemsBookFilters')
 
 /**
  * @typedef EBookFileObject
@@ -192,6 +193,14 @@ class Book extends Model {
         ]
       }
     )
+
+    Book.addHook('afterDestroy', async (instance) => {
+      libraryItemsBookFilters.clearCountCache('afterDestroy')
+    })
+
+    Book.addHook('afterCreate', async (instance) => {
+      libraryItemsBookFilters.clearCountCache('afterCreate')
+    })
   }
 
   /**

server/models/LibraryItem.js

@@ -73,6 +73,10 @@ class LibraryItem extends Model {
 
     /** @type {Book.BookExpanded|Podcast.PodcastExpanded} - only set when expanded */
     this.media
+    /** @type {string} */
+    this.title // Only used for sorting
+    /** @type {string} */
+    this.titleIgnorePrefix // Only used for sorting
   }
 
   /**
@@ -677,7 +681,9 @@ class LibraryItem extends Model {
         lastScan: DataTypes.DATE,
         lastScanVersion: DataTypes.STRING,
         libraryFiles: DataTypes.JSON,
-        extraData: DataTypes.JSON
+        extraData: DataTypes.JSON,
+        title: DataTypes.STRING,
+        titleIgnorePrefix: DataTypes.STRING
       },
       {
         sequelize,
@@ -695,6 +701,15 @@ class LibraryItem extends Model {
           {
             fields: ['libraryId', 'mediaType', 'size']
           },
+          {
+            fields: ['libraryId', 'mediaType', 'createdAt']
+          },
+          {
+            fields: ['libraryId', 'mediaType', { name: 'title', collate: 'NOCASE' }]
+          },
+          {
+            fields: ['libraryId', 'mediaType', { name: 'titleIgnorePrefix', collate: 'NOCASE' }]
+          },
           {
             fields: ['libraryId', 'mediaId', 'mediaType']
           },

server/scanner/BookScanner.js

@@ -521,6 +521,8 @@ class BookScanner {
     libraryItemObj.isMissing = false
     libraryItemObj.isInvalid = false
     libraryItemObj.extraData = {}
+    libraryItemObj.title = bookMetadata.title
+    libraryItemObj.titleIgnorePrefix = getTitleIgnorePrefix(bookMetadata.title)
 
     // Set isSupplementary flag on ebook library files
     for (const libraryFile of libraryItemObj.libraryFiles) {

server/utils/profiler.js

@@ -0,0 +1,41 @@
+const { performance, createHistogram } = require('perf_hooks')
+const util = require('util')
+const Logger = require('../Logger')
+
+const histograms = new Map()
+
+function profile(asyncFunc, isFindQuery = true, funcName = asyncFunc.name) {
+  if (!histograms.has(funcName)) {
+    const histogram = createHistogram()
+    histogram.values = []
+    histograms.set(funcName, histogram)
+  }
+  const histogram = histograms.get(funcName)
+
+  return async (...args) => {
+    if (isFindQuery) {
+      const findOptions = args[0]
+      Logger.info(`[${funcName}] findOptions:`, util.inspect(findOptions, { depth: null }))
+      findOptions.logging = (query, time) => Logger.info(`[${funcName}] ${query} Elapsed time: ${time}ms`)
+      findOptions.benchmark = true
+    }
+    const start = performance.now()
+    try {
+      const result = await asyncFunc(...args)
+      return result
+    } catch (error) {
+      Logger.error(`[${funcName}] failed`)
+      throw error
+    } finally {
+      const end = performance.now()
+      const duration = Math.round(end - start)
+      histogram.record(duration)
+      histogram.values.push(duration)
+      Logger.info(`[${funcName}] duration: ${duration}ms`)
+      Logger.info(`[${funcName}] histogram values:`, histogram.values)
+      Logger.info(`[${funcName}] histogram:`, histogram)
+    }
+  }
+}
+
+module.exports = { profile }

server/utils/queries/libraryItemsBookFilters.js

@@ -4,6 +4,9 @@ const Logger = require('../../Logger')
 const authorFilters = require('./authorFilters')
 
 const ShareManager = require('../../managers/ShareManager')
+const { profile } = require('../profiler')
+
+const countCache = new Map()
 
 module.exports = {
   /**
@@ -270,9 +273,9 @@ module.exports = {
       }
 
       if (global.ServerSettings.sortingIgnorePrefix) {
-        return [[Sequelize.literal('titleIgnorePrefix COLLATE NOCASE'), dir]]
+        return [[Sequelize.literal('`libraryItem`.`titleIgnorePrefix` COLLATE NOCASE'), dir]]
       } else {
-        return [[Sequelize.literal('`book`.`title` COLLATE NOCASE'), dir]]
+        return [[Sequelize.literal('`libraryItem`.`title` COLLATE NOCASE'), dir]]
       }
     } else if (sortBy === 'sequence') {
       const nullDir = sortDesc ? 'DESC NULLS FIRST' : 'ASC NULLS LAST'
@@ -336,6 +339,28 @@ module.exports = {
     return { booksToExclude, bookSeriesToInclude }
   },
 
+  clearCountCache(hook) {
+    Logger.debug(`[LibraryItemsBookFilters] book.${hook}: Clearing count cache`)
+    countCache.clear()
+  },
+
+  async findAndCountAll(findOptions, limit, offset) {
+    const findOptionsKey = JSON.stringify(findOptions)
+    Logger.debug(`[LibraryItemsBookFilters] findOptionsKey: ${findOptionsKey}`)
+
+    findOptions.limit = limit || null
+    findOptions.offset = offset
+
+    if (countCache.has(findOptionsKey)) {
+      const rows = await Database.bookModel.findAll(findOptions)
+      return { rows, count: countCache.get(findOptionsKey) }
+    } else {
+      const result = await Database.bookModel.findAndCountAll(findOptions)
+      countCache.set(findOptionsKey, result.count)
+      return result
+    }
+  },
+
   /**
    * Get library items for book media type using filter and sort
    * @param {string} libraryId
@@ -411,7 +436,8 @@ module.exports = {
     if (includeRSSFeed) {
       libraryItemIncludes.push({
         model: Database.feedModel,
-        required: filterGroup === 'feed-open'
+        required: filterGroup === 'feed-open',
+        separate: true
       })
     }
     if (filterGroup === 'feed-open' && !includeRSSFeed) {
@@ -560,7 +586,7 @@ module.exports = {
       }
     }
 
-    const { rows: books, count } = await Database.bookModel.findAndCountAll({
+    const findOptions = {
       where: bookWhere,
       distinct: true,
       attributes: bookAttributes,
@@ -577,10 +603,11 @@ module.exports = {
         ...bookIncludes
       ],
       order: sortOrder,
-      subQuery: false,
-      limit: limit || null,
-      offset
-    })
+      subQuery: false
+    }
+
+    const findAndCountAll = process.env.QUERY_PROFILING ? profile(this.findAndCountAll) : this.findAndCountAll
+    const { rows: books, count } = await findAndCountAll(findOptions, limit, offset)
 
     const libraryItems = books.map((bookExpanded) => {
       const libraryItem = bookExpanded.libraryItem

test/server/migrations/v2.19.1-copy-title-to-library-items.test.js

@@ -0,0 +1,148 @@
+const chai = require('chai')
+const sinon = require('sinon')
+const { expect } = chai
+
+const { DataTypes, Sequelize } = require('sequelize')
+const Logger = require('../../../server/Logger')
+
+const { up, down } = require('../../../server/migrations/v2.19.1-copy-title-to-library-items')
+
+describe('Migration v2.19.1-copy-title-to-library-items', () => {
+  let sequelize
+  let queryInterface
+  let loggerInfoStub
+
+  beforeEach(async () => {
+    sequelize = new Sequelize({ dialect: 'sqlite', storage: ':memory:', logging: false })
+    queryInterface = sequelize.getQueryInterface()
+    loggerInfoStub = sinon.stub(Logger, 'info')
+
+    await queryInterface.createTable('books', {
+      id: { type: DataTypes.INTEGER, allowNull: false, primaryKey: true, unique: true },
+      title: { type: DataTypes.STRING, allowNull: true },
+      titleIgnorePrefix: { type: DataTypes.STRING, allowNull: true }
+    })
+
+    await queryInterface.createTable('libraryItems', {
+      id: { type: DataTypes.INTEGER, allowNull: false, primaryKey: true, unique: true },
+      libraryId: { type: DataTypes.INTEGER, allowNull: false },
+      mediaType: { type: DataTypes.STRING, allowNull: false },
+      mediaId: { type: DataTypes.INTEGER, allowNull: false },
+      createdAt: { type: DataTypes.DATE, allowNull: false }
+    })
+
+    await queryInterface.bulkInsert('books', [
+      { id: 1, title: 'The Book 1', titleIgnorePrefix: 'Book 1, The' },
+      { id: 2, title: 'Book 2', titleIgnorePrefix: 'Book 2' }
+    ])
+
+    await queryInterface.bulkInsert('libraryItems', [
+      { id: 1, libraryId: 1, mediaType: 'book', mediaId: 1, createdAt: '2025-01-01 00:00:00.000 +00:00' },
+      { id: 2, libraryId: 2, mediaType: 'book', mediaId: 2, createdAt: '2025-01-02 00:00:00.000 +00:00' }
+    ])
+  })
+
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  describe('up', () => {
+    it('should copy title and titleIgnorePrefix to libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+
+      const [libraryItems] = await queryInterface.sequelize.query('SELECT * FROM libraryItems')
+      expect(libraryItems).to.deep.equal([
+        { id: 1, libraryId: 1, mediaType: 'book', mediaId: 1, title: 'The Book 1', titleIgnorePrefix: 'Book 1, The', createdAt: '2025-01-01 00:00:00.000 +00:00' },
+        { id: 2, libraryId: 2, mediaType: 'book', mediaId: 2, title: 'Book 2', titleIgnorePrefix: 'Book 2', createdAt: '2025-01-02 00:00:00.000 +00:00' }
+      ])
+    })
+
+    it('should add index on title to libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='index' AND name='library_items_library_id_media_type_title_ignore_prefix'`)
+      expect(count).to.equal(1)
+    })
+
+    it('should add trigger to books.title to update libraryItems.title', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='trigger' AND name='update_library_items_title'`)
+      expect(count).to.equal(1)
+    })
+
+    it('should add index on titleIgnorePrefix to libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='index' AND name='library_items_library_id_media_type_title_ignore_prefix'`)
+      expect(count).to.equal(1)
+    })
+
+    it('should add trigger to books.titleIgnorePrefix to update libraryItems.titleIgnorePrefix', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='trigger' AND name='update_library_items_title_ignore_prefix'`)
+      expect(count).to.equal(1)
+    })
+
+    it('should add index on createdAt to libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='index' AND name='library_items_library_id_media_type_created_at'`)
+      expect(count).to.equal(1)
+    })
+  })
+
+  describe('down', () => {
+    it('should remove title and titleIgnorePrefix from libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+      await down({ context: { queryInterface, logger: Logger } })
+
+      const [libraryItems] = await queryInterface.sequelize.query('SELECT * FROM libraryItems')
+      expect(libraryItems).to.deep.equal([
+        { id: 1, libraryId: 1, mediaType: 'book', mediaId: 1, createdAt: '2025-01-01 00:00:00.000 +00:00' },
+        { id: 2, libraryId: 2, mediaType: 'book', mediaId: 2, createdAt: '2025-01-02 00:00:00.000 +00:00' }
+      ])
+    })
+
+    it('should remove title trigger from books', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+      await down({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='trigger' AND name='update_library_items_title'`)
+      expect(count).to.equal(0)
+    })
+
+    it('should remove titleIgnorePrefix trigger from books', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+      await down({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='trigger' AND name='update_library_items_title_ignore_prefix'`)
+      expect(count).to.equal(0)
+    })
+
+    it('should remove index on titleIgnorePrefix from libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+      await down({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='index' AND name='library_items_library_id_media_type_title_ignore_prefix'`)
+      expect(count).to.equal(0)
+    })
+
+    it('should remove index on title from libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+      await down({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='index' AND name='library_items_library_id_media_type_title'`)
+      expect(count).to.equal(0)
+    })
+
+    it('should remove index on createdAt from libraryItems', async () => {
+      await up({ context: { queryInterface, logger: Logger } })
+      await down({ context: { queryInterface, logger: Logger } })
+
+      const [[{ count }]] = await queryInterface.sequelize.query(`SELECT COUNT(*) as count FROM sqlite_master WHERE type='index' AND name='library_items_library_id_media_type_created_at'`)
+      expect(count).to.equal(0)
+    })
+  })
+})