Emberjs - Undirty Dependent Relationships on Save

dependent_relationship_save_mixin.js

// The following DependentRelationshipSaveMixin will undirty any associated models on save.
// These models have the `{ dependent: true }` flag set on their relation declaration. This is useful
// when using embedded relationships with the ember-data.dependent-relationships.js addon
// (https://gist.github.com/slindberg/8660986).

var commitAttributes = function(model) {
  model._inFlightAttributes = model._attributes;
  model._attributes = {};
  model.adapterWillCommit();
  return model;
};

var adapterDidCommit = function(model) {
  model.adapterDidCommit();
};

// Transition all dirty dependent child models into inFlight.
var callWillCommitOnDependents = function(model) {
  model.eachDependentRelation(function(name, relationship) {
    var relation = model.get(name);

    if (Em.isNone(relation)) {
      return;
    } else if (Ember.isArray(relation)) {
      relation.filterBy('isDirty', true).map(commitAttributes);
      relation.filterBy('isDirty', true).map(callWillCommitOnDependents);
    } else if (relation.get('isDirty')) {
      commitAttributes(relation);
      callWillCommitOnDependents(relation);
    }
  });
};

// Transition all dirty dependent child models into saved.
var callDidCommitOnDependents = function(model) {
  model.eachDependentRelation(function(name, relationship) {
    var relation = model.get(name);

    if (Em.isNone(relation)) {
      return;
    } else if (Ember.isArray(relation)) {
      relation.filterBy('isDirty', true).map(adapterDidCommit);
      relation.filterBy('isDirty', true).map(callWillCommitOnDependents);
    } else if (relation.get('isDirty') && relation.get('isSaving')) {
      adapterDidCommit(relation);
      callDidCommitOnDependents(relation);
    }
  });
};

var DependentRelationshipSaveMixin = Ember.Mixin.create({
  save: function() {
    callWillCommitOnDependents(this);

    return this._super().then(function(savedModel) {
      callDidCommitOnDependents(savedModel);
      return savedModel;
    });
  }
});