Function belongsToMany

lib/associations/mixin.js:47–75

(target, options = {})

  },

  belongsToMany(target, options = {}) {
    if (!isModel(target, this.sequelize)) {
      throw new Error(`${this.name}.belongsToMany called with something that's not a subclass of Sequelize.Model`);
    }

    const source = this;

    // Since this is a mixin, we'll need a unique letiable name for hooks (since Model will override our hooks option)
    options.hooks = options.hooks === undefined ? false : Boolean(options.hooks);
    options.useHooks = options.hooks;
    options.timestamps = options.timestamps === undefined ? this.sequelize.options.timestamps : options.timestamps;
    Object.assign(options, _.omit(source.options, ['hooks', 'timestamps', 'scopes', 'defaultScope']));

    if (options.useHooks) {
      this.runHooks('beforeAssociate', { source, target, type: BelongsToMany }, options);
    }
    // the id is in the foreign table or in a connecting table
    const association = new BelongsToMany(source, target, options);
    source.associations[association.associationAccessor] = association;

    association._injectAttributes();
    association.mixin(source.prototype);

    if (options.useHooks) {
      this.runHooks('afterAssociate', { source, target, type: BelongsToMany, association }, options);
    }

    return association;
  },

  getAssociations(target) {
    return Object.values(this.associations).filter(association => association.target.name === target.name);