# Saving object with children in 1 request

**URL:** <https://discuss.emberjs.com/t/saving-object-with-children-in-1-request/9341>\
**Category:** Ember Data\
**Created:** [December 22, 2015, 10:37am UTC](https://discuss.emberjs.com/t/saving-object-with-children-in-1-request/9341 "2015-12-22T10:37:59Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![markh](https://avatars.discourse-cdn.com/v4/letter/m/7993a0/32.png) [@markh](https://discuss.emberjs.com/u/markh)\
**Post date:** [December 22, 2015, 10:37am UTC](https://discuss.emberjs.com/t/saving-object-with-children-in-1-request/9341/1 "2015-12-22T10:37:59Z")

</div>

I have previously saved an object with children in multiple requests but I don’t like the fact that if one loses internet connection in the middle of the save, the client and server are out of sync unless one does a browser refresh. I’m trying to do it in 1 one request using Rail’s [accepts\_nested\_attributes\_for](http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html). The save works but Ember Data treats the children in the response as new children i.e. if an object has 1 newly created child before the save, after the save it will have 2 - the original record and the record from the response. Has anybody figured out a way around this?

Below is how I’m adding ‘\_attributes’ suffix to embedded records key. I’m using Ember Data 1.0.0 beta 16.

app/serializers/application.coffee:

```
ApplicationSerializer = DS.ActiveModelSerializer.extend RailsEmbeddedRecordsMixin,
  attrs:
    childItems:
      serialize: 'records'

```

app/serializers/rails-embedded-records-mixin.coffee:

```
RailsEmbeddedRecordsMixin = Ember.Mixin.create DS.EmbeddedRecordsMixin,

      serializeBelongsTo: (snapshot, json, relationship) ->
        attr = relationship.key
        if @noSerializeOptionSpecified(attr)
          @_super(snapshot, json, relationship)
          return
        includeIds = @hasSerializeIdsOption(attr)
        includeRecords = @hasSerializeRecordsOption(attr)
        embeddedSnapshot = snapshot.belongsTo(attr)
        if includeIds
          key = @keyForRelationship(attr, relationship.kind)
          if !embeddedSnapshot
            json[key] = null
          else
            json[key] = embeddedSnapshot.id
        else if includeRecords
          key = @keyForAttribute(attr) + '_attributes'
          if !embeddedSnapshot
            json[key] = null
          else
            json[key] = embeddedSnapshot.record.serialize(includeId: true)
            @removeEmbeddedForeignKey(snapshot, embeddedSnapshot, relationship, json[key])

      serializeHasMany: (snapshot, json, relationship) ->
        attr = relationship.key
        if @noSerializeOptionSpecified(attr)
          @_super(snapshot, json, relationship)

        includeIds = @hasSerializeIdsOption(attr)
        includeRecords = @hasSerializeRecordsOption(attr)
        if includeIds
          key = @keyForRelationship(attr, relationship.kind)
          json[key] = snapshot.hasMany(attr, ids: true)
        else if includeRecords
          key = @keyForAttribute(attr) + '_attributes'
          json[key] = snapshot.hasMany(attr).map (embeddedSnapshot) =>
            embeddedJson = embeddedSnapshot.record.serialize(includeId: true)
            @removeEmbeddedForeignKey(snapshot, embeddedSnapshot, relationship, embeddedJson)
            return embeddedJson

```

---

<div class="post-metadata">

**Author:** ![kicauipul](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.emberjs.com/kicauipul/32/11383_2.png) [@kicauipul](https://discuss.emberjs.com/u/kicauipul)\
**Post date:** [December 23, 2015, 1:38am UTC](https://discuss.emberjs.com/t/saving-object-with-children-in-1-request/9341/2 "2015-12-23T01:38:38Z")

</div>

Hmm look like it was disscussed here [Proposal/Fix: Saving new embedded records creates duplicates](http://discuss.emberjs.com/t/proposal-fix-saving-new-embedded-records-creates-duplicates/3677)

Look like the fix on newer version of ember data.