Multiple serializers for a single model

问题

I have a User model that hasMany Reminders.

When a User is first created, I want the reminders to be embedded. When it is updated, I don't want its reminders to be embedded. How can I do this?

My strategy was to create a custom new-user-serializer that had DS.EmbeddedRecordsMixin and

reminders: { embedded: 'always' }

and use that in my UserAdapters createRecord method, but I couldn't get it working.

回答1:

It's not ideal, but you can do it -

`import DS from 'ember-data'`
`import ApplicationSerializer from './application'`

UserSerializer = ApplicationSerializer.extend DS.EmbeddedRecordsMixin,

    attrs:
        reminders: {}

    serialize: (snapshot, options) ->
        if snapshot.attr('embedRemindersFlag')
            @attrs.reminders.embedded = 'always'
        @_super(snapshot, options)

`export default UserSerializer`

embedRemindersFlag has to be an attribute of the model so snapshot picks it up, but I have separately implemented a transient option which prevents an attribute from being sent to the server.

embedRemindersFlag: DS.attr 'string', {defaultValue: false, transient: true}

来源：https://stackoverflow.com/questions/27710419/multiple-serializers-for-a-single-model