Init sqlite take 2

server/models/CollectionBook.js

@@ -0,0 +1,42 @@
+const { DataTypes, Model } = require('sequelize')
+
+module.exports = (sequelize) => {
+  class CollectionBook extends Model {
+    static removeByIds(collectionId, bookId) {
+      return this.destroy({
+        where: {
+          bookId,
+          collectionId
+        }
+      })
+    }
+  }
+
+  CollectionBook.init({
+    id: {
+      type: DataTypes.UUID,
+      defaultValue: DataTypes.UUIDV4,
+      primaryKey: true
+    },
+    order: DataTypes.INTEGER
+  }, {
+    sequelize,
+    timestamps: true,
+    updatedAt: false,
+    modelName: 'collectionBook'
+  })
+
+  // Super Many-to-Many
+  // ref: https://sequelize.org/docs/v6/advanced-association-concepts/advanced-many-to-many/#the-best-of-both-worlds-the-super-many-to-many-relationship
+  const { book, collection } = sequelize.models
+  book.belongsToMany(collection, { through: CollectionBook })
+  collection.belongsToMany(book, { through: CollectionBook })
+
+  book.hasMany(CollectionBook)
+  CollectionBook.belongsTo(book)
+
+  collection.hasMany(CollectionBook)
+  CollectionBook.belongsTo(collection)
+
+  return CollectionBook
+}