Ember Data model replication

replicable-without-fragments.js

/**
 * @package ReplicableMixin
 * @author Joel A. Villarreal Bertoldi
 * @version 0.0.1
 * @license MIT
 * 
 * Allows replicating a model with relationships to the database.
 * 
 * Usage:
 * 
 *    model.replicate().then(function(copiedModel) {
 *      //do something!
 *    });
 * 
 * To configure it, import and apply Replicable mixin:
 * 
 * ´´´js
 * import Replicable from 'replicable';
 * import DS from 'ember-data';
 * 
 * export default DS.Model.extend(Replicable, {
 *   //...
 * });
 * ´´´
 * 
 * To prevent an attribute or relationship from being copied:
 * 
 * ´´´js
 * export default DS.Model.extend(Replicable, {
 *   name: DS.attr('string'),
 *   nonCopyableData: DS.attr('string', { copy: false }),
 *   nonCopyableAssets: DS.hasMany('asset', { async: true, copy: false }),
 * });
 * ´´´
 * 
 * To transform an attribute before copying it:
 * 
 * ´´´js
 * export default DS.Model.extend(Replicable, {
 *   name: DS.attr('string', { 
 *     copyTransform: function() {
 *       return this.get('name') + ' - Copy';
 *     }
 *   })
 * });
 * ´´´
 *
 */
 
import Ember from 'ember';

export default Ember.Mixin.create({
  replicate: function() {
    var model = this.store.createRecord(this.constructor.typeKey),
        _this = this;

    model.beginPropertyChanges();

    var attrIterator = function(name, member) {
      if (member.options.hasOwnProperty('copy')) {
        if (member.options.copy === false) {
          return;
        }
      }

      if (typeof member.options.copyTransform === 'function') {
        model.set(name, member.options.copyTransform.call(_this));
      } else {
        model.set(name, _this.get(name));
      }
    };

    var relIterator = function(name, member) {
      if (member.options.hasOwnProperty('copy')) {
        if (member.options.copy === false) {
          return;
        }
      }

      if (member.kind === 'hasMany') {
        model.get(name).pushObjects(_this.get(name));
      } else {
        model.set(name, _this.get(name));
      }
    };

    this.eachAttribute(attrIterator);
    this.eachRelationship(relIterator);

    model.endPropertyChanges();

    return new Ember.RSVP.Promise(function(resolve, reject) {
      model.save().then(function() {
        resolve(model);
      }).catch(reject);
    });
  }
});

replicable.js

/**
 * @package ReplicableWithFragmentsMixin
 * @author Joel A. Villarreal Bertoldi
 * @version 0.0.1
 * @license MIT
 * 
 * Allows replicating a model with relationships to the database.
 * Compatible with Ember Model Fragments
 * 
 * Usage:
 * 
 *    model.replicate().then(function(copiedModel) {
 *      //do something!
 *    });
 * 
 * To configure it, import and apply Replicable mixin:
 * 
 * ´´´js
 * import Replicable from 'replicable';
 * import DS from 'ember-data';
 * 
 * export default DS.Model.extend(Replicable, {
 *   //...
 * });
 * ´´´
 * 
 * To prevent an attribute or relationship from being copied:
 * 
 * ´´´js
 * export default DS.Model.extend(Replicable, {
 *   name: DS.attr('string'),
 *   nonCopyableData: DS.attr('string', { copy: false }),
 *   nonCopyableAssets: DS.hasMany('asset', { async: true, copy: false }),
 *   nonCopyableFragments: DS.hasManyFragments('fragment', { copy: false })
 * });
 * ´´´
 * 
 * To transform an attribute before copying it:
 * 
 * ´´´js
 * export default DS.Model.extend(Replicable, {
 *   name: DS.attr('string', { 
 *     copyTransform: function() {
 *       return this.get('name') + ' - Copy';
 *     }
 *   })
 * });
 * ´´´
 *
 */
 
import Ember from 'ember';

export default Ember.Mixin.create({
  replicate: function() {
    var model = this.store.createRecord(this.constructor.typeKey),
        _this = this;

    model.beginPropertyChanges();

    var attrIterator = function(name, member) {
      if (member.options.hasOwnProperty('copy')) {
        if (member.options.copy === false) {
          return;
        }
      }

      if (typeof member.options.copyTransform === 'function') {
        model.set(name, member.options.copyTransform.call(_this));
      } else {
        if (!!_this._fragments) {
          if (!!_this._fragments[name]) {
            _this.get(name).forEach(function(fragment) {
              model.get(name).pushObject(fragment.copy());
            });
          } else {
            model.set(name, _this.get(name));
          }
        } else {
          model.set(name, _this.get(name));
        }
      }
    };

    var relIterator = function(name, member) {
      if (member.options.hasOwnProperty('copy')) {
        if (member.options.copy === false) {
          return;
        }
      }

      if (member.kind === 'hasMany') {
        model.get(name).pushObjects(_this.get(name));
      } else {
        model.set(name, _this.get(name));
      }
    };

    this.eachAttribute(attrIterator);
    this.eachRelationship(relIterator);

    model.endPropertyChanges();

    return new Ember.RSVP.Promise(function(resolve, reject) {
      model.save().then(function() {
        resolve(model);
      }).catch(reject);
    });
  }
});