vitamin/lib/relations/morph-to-many.js

Data Mapper library for Node.js applications

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };

var _belongsToMany = require('./belongs-to-many');

var _belongsToMany2 = _interopRequireDefault(_belongsToMany);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

// exports
var _class = function (_Relation) {
  _inherits(_class, _Relation);

  /**
   * MorphToManyRelation constructor
   * 
   * @param {Model} parent model instance
   * @param {Model} target mdoel instance
   * @param {String} pivot table name
   * @param {String} type
   * @param {String} pfk parent model foreign key
   * @param {String} tfk target model foreign key
   * @constructor
   */
  function _class(parent, target, pivot, type, pfk, tfk) {
    _classCallCheck(this, _class);

    var _this = _possibleConstructorReturn(this, (_class.__proto__ || Object.getPrototypeOf(_class)).call(this, parent, target, pivot, pfk, tfk));

    _this.morphType = type;
    _this.morphName = parent.name;
    return _this;
  }

  /**
   * Add constraints on the relation query
   * 
   * @param {Model} model
   * @return this relation
   */


  _createClass(_class, [{
    key: 'addConstraints',
    value: function addConstraints(model) {
      this.addMorphTypeConstraint();
      return _get(_class.prototype.__proto__ || Object.getPrototypeOf(_class.prototype), 'addConstraints', this).call(this, model);
    }

    /**
     * Create a query for the pivot table
     * 
     * @param {Boolean} constraints
     * @return query
     * @private
     */

  }, {
    key: 'newPivotQuery',
    value: function newPivotQuery() {
      var constraints = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : true;

      var query = _get(_class.prototype.__proto__ || Object.getPrototypeOf(_class.prototype), 'newPivotQuery', this).call(this, constraints);

      if (constraints) query.where(this.morphType, this.morphName);

      return query;
    }

    /**
     * Create a record to insert into the pivot table
     * 
     * @param {Any} id of the target model
     * @param {Object} pivots attributes
     * @return plain object
     * @private
     */

  }, {
    key: 'createPivotRecord',
    value: function createPivotRecord(id) {
      var pivots = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      var record = _get(_class.prototype.__proto__ || Object.getPrototypeOf(_class.prototype), 'createPivotRecord', this).apply(this, arguments);

      record[this.morphType] = this.morphName;

      return record;
    }

    /**
     * Get the qualified morph type name
     * 
     * @return string
     */

  }, {
    key: 'getQualifiedTypeColumn',
    value: function getQualifiedTypeColumn() {
      return this._through.getQualifiedColumn(this.morphType);
    }

    /**
     * Add `morphType` constraint on the relation query
     * 
     * @private
     */

  }, {
    key: 'addMorphTypeConstraint',
    value: function addMorphTypeConstraint() {
      this.query.where(this.getQualifiedTypeColumn(), this.morphName);
    }

    /**
     * Add eager load constraints on the relation query
     * 
     * @param {Array} models
     * @private
     */

  }, {
    key: 'addEagerLoadConstraints',
    value: function addEagerLoadConstraints(models) {
      _get(_class.prototype.__proto__ || Object.getPrototypeOf(_class.prototype), 'addEagerLoadConstraints', this).call(this, models);
      this.addMorphTypeConstraint();
    }

    /**
     * Add `join`constraints to the intermediate table
     * 
     * @private
     */

  }, {
    key: 'addPivotJoin',
    value: function addPivotJoin() {
      var _this2 = this;

      this.query.join(this.table + ' as ' + this._through.alias, function (qb) {
        qb.on(_this2.getQualifiedTypeColumn(), _this2.morphName).andOn(_this2.query.getQualifiedColumn(_this2.target.primaryKey), _this2._through.getQualifiedColumn(_this2.targetKey));
      });
    }
  }]);

  return _class;
}(_belongsToMany2.default);

exports.default = _class;