Method constructor

lib/associations/has-many.js:18–110

(source, target, options)

 */
class HasMany extends Association {
  constructor(source, target, options) {
    super(source, target, options);

    this.associationType = 'HasMany';
    this.targetAssociation = null;
    this.sequelize = source.sequelize;
    this.isMultiAssociation = true;
    this.foreignKeyAttribute = {};

    if (this.options.through) {
      throw new Error('N:M associations are not supported with hasMany. Use belongsToMany instead');
    }

    /*
    * If self association, this is the target association
    */
    if (this.isSelfAssociation) {
      this.targetAssociation = this;
    }

    if (this.as) {
      this.isAliased = true;

      if (_.isPlainObject(this.as)) {
        this.options.name = this.as;
        this.as = this.as.plural;
      } else {
        this.options.name = {
          plural: this.as,
          singular: Utils.singularize(this.as)
        };
      }
    } else {
      this.as = this.target.options.name.plural;
      this.options.name = this.target.options.name;
    }

    /*
     * Foreign key setup
     */
    if (_.isObject(this.options.foreignKey)) {
      this.foreignKeyAttribute = this.options.foreignKey;
      this.foreignKey = this.foreignKeyAttribute.name || this.foreignKeyAttribute.fieldName;
    } else if (this.options.foreignKey) {
      this.foreignKey = this.options.foreignKey;
    }

    if (!this.foreignKey) {
      this.foreignKey = Utils.camelize(
        [
          this.source.options.name.singular,
          this.source.primaryKeyAttribute
        ].join('_')
      );
    }

    if (this.target.rawAttributes[this.foreignKey]) {
      this.identifierField = this.target.rawAttributes[this.foreignKey].field || this.foreignKey;