I’m trying to upgrade to the ember-data beta but I’m running into some issues. The relevant code is pasted here and I’ve listed the issue and questions below, any help would be greatly appreciated!
# store
App.ApplicationSerializer = DS.ActiveModelSerializer.extend
serializeAttribute: (record, json, key, attribute) ->
if !attribute.options.readOnly
return @_super(record, json, key, attribute)
App.ApplicationAdapter = DS.ActiveModelAdapter.extend
namespace: 'api/v1'
pathForType: (type) ->
underscored = Ember.String.underscore(type)
return Ember.String.pluralize(underscored)
# models
App.Trackable = Ember.Model.extend()
App.Notifiable = App.Trackable.extend
notifications: DS.hasMany('notificationActivity', { async: true })
App.Attachable = App.Notifiable.extend
attachments: DS.hasMany('attachment', { async: true })
App.Commentable = App.Attachable.extend
comments: DS.hasMany('comment', { async: true })
App.Attachment = App.Commentable.extend
user: DS.belongsTo('user', { async: true, readOnly: true })
attachable: DS.belongsTo('attachable', { polymorphic: true, async: true })
App.Profile = App.Attachable.extend
user: DS.belongsTo('user', { async: true, readOnly: true })
photo: DS.belongsTo('attachment', { async: true })
App.Activity = App.Trackable.extend
owner: DS.belongsTo('user', { async: true })
recipient: DS.belongsTo('user', { async: true })
trackable: DS.belongsTo('trackable', { polymorphic: true, async: true })
App.NotificationActivity = App.Activity.extend()
App.User = App.Model.extend
profile: DS.belongsTo('profile', { async: true })
posts: DS.hasMany('post', { async: true })
attachments: DS.hasMany('attachment', { async: true })
friends: DS.hasMany('user', { async: true })
friendships: DS.hasMany('friendship', { async: true })
events: DS.hasMany('event', { async: true })
notifications: DS.hasMany('notificationActivity', { async: true })
# edit controller
App.UserEditController = App.OverlayController.extend
actions:
save: ->
profile = @get('model')
profile.get('photo').then (photo) =>
if photo.get('isDirty')
photo.save().then (photo) =>
profile.save().then =>
@send 'close'
, (error) ->
profile.get('photo').deleteRecord()
profile.get('photo').save()
console.log error
, (error) ->
alert "Uh-oh, we couldn't save your new photo"
console.log error
else if profile.get('isDirty')
profile.save().then =>
@send 'close'
, (error) ->
alert "Uh-oh, something went wrong :("
console.log error
else
@send 'close'
, (error) ->
alert "Uh-oh, couldn't load photo"
console.log error
Main issue:
When saving the photo, the serialiser fails because the belongsTo relationship is null meaning it can’t access the constructor.
I’m not sure if this is because a) I don’t have my relationships defined properly, or b) ember-data doesn’t keep track of the relationship graph.
If I try setting up the relationship explicitly before saving with photo.set('attachable', profile) then the serialiser still fails because belongsTo.constructor.typeKey is undefined.
** Queries**
-
Before ember-data 1.0 this save method was much simpler as it used embedded relationships to save the profile and photo together in one API call. However, 1.0 seems to have phased out that type of API access which has resulted in much more complex code - is there a simpler way than constantly checking the success of saves in a chain and manual cleanup of already created relationships if latter saves fail?
-
Is there anyway to retrieve an actual model from a
.get('relationship'call rather than a promise object? I’m finding I’m having to work around this a lot throughout my app. -
I’ve found I need to create all of my polymorphic relationship models (attachable, commentable, etc) by extending the previous one in the chain otherwise I end up with errors such as
You can only add a 'attachable' record to this relationship. This means every one of my models that uses a polymorphic relationship must include the entire chain even if it only uses one type of polymorphic association. Is there a way to do this with mixins or similar instead so there isn’t such a dependency problem?
I’m curious about this because I don’t see your defintiions for the association targets (Attachment and NotificationActivity). Also, did you read the Ember Data transitioning document?