Ember.js commiting parent model with already existing child models

问题

Cheers! For example I have three models:

App.Foo = DS.Model.extend({
  bars: DS.hasMany('App.Bar', {embedded:'always'}),
  bazes: DS.hasMany('App.Baz', {embedded:'always'})
});

App.Bar = DS.Model.extend({
  foo: DS.belongsTo('App.Foo')
});

App.Baz = DS.Model.extend({
  foo: DS.belongsTo('App.Foo)
});

And adapter mappings like these:

App.RESTSerializer = DS.RESTSerializer.extend({
  init: function() {
    this._super();

    this.map('App.Foo', {
      bars:{embedded: 'always'},
      bazes:{embedded: 'always'}
    })
  }
});

I'm saving child records first in separated transactions (github.com/emberjs/data/pull/440):

barTransaction = App.store.transaction();
bar = barTransaction.createRecord(App.Bar);

//later
bazTransaction = App.store.transaction();
baz = bazTransaction.createRecord(App.Baz);

//later
fooTransaction = App.store.transaction();
foo = fooTransaction.createRecord(App.Foo);

//later
foo.get('bars').addObject(bar);
foo.get('bazes').addObject(baz);
fooTransaction.commit();

I just want to know if it possible to save parent and all child records with one POST request? For now it's creating one POST request for every child record separately.

回答1:

I believe your issue is with an outdated way of mapping embedded records. This used to happen in the serializer, but is now happening on a map() on the adapter...

You can see the integration test here: https://github.com/emberjs/data/blob/master/packages/ember-data/tests/integration/embedded/embedded_saving_test.js#L50

I think something along these lines will work:

App.Foo = DS.Model.extend({
  bars: DS.hasMany('App.Bar'),
  bazes: DS.hasMany('App.Baz')
});

App.Bar = DS.Model.extend({
  foo: DS.belongsTo('App.Foo')
});

App.Baz = DS.Model.extend({
  foo: DS.belongsTo('App.Foo')
});

App.Adapter = DS.RESTAdapter.extend({..configs..});

App.Adapter.map('App.Foo', {
  bars:{embedded: 'always'},
  bazes:{embedded: 'always'}
})

This should POST to the api at: api.com/foo and include the bars and bazes

来源：https://stackoverflow.com/questions/15025618/ember-js-commiting-parent-model-with-already-existing-child-models

标签

javascript

ember.js

ember-data