Does it support nested data on the fields declaration?

[marcio0]

As a django-piston user, it is common to have nested data on the fields declaration:

fields = (
    'id', 'username',
    ('group', ('id', 'name'))
)

On django-tastypie, this is similar to use full = True on ForeignKey fields.

Is there a way to work with nested data?

[toastdriven]

As of right now, that would be a manual process (overriding prepare - https://github.com/toastdriven/restless/blob/master/restless/resources.py#L463-L490). Restless can currently traverse into a given object (looking up deep information), but doesn't really have a concept of returning nested data unless you explicitly hand that data back.

It'd be nice to have some kind of support for this in the future (so I'll leave the issue open), but for now, it's BYOD (bring your own data). For example, you could do:

class MyResource(DjangoResource):
    # Do **NOT** specify fields.
    # fields = {}

    def details(self, id):
        user = User.objects.get(pk=id).select_related('group')
        return {
            'id': user.id,
            'group': {
                'id': user.group.id,
                'name': user.group.name,
            }
        }

Not super-elegant (& there's definitely ways to abstract your own logic), but it would at least function for now.

[toastdriven]

This should be easier to implement as of Restless 2.0.0, at least in terms of abstraction & less pain. A custom FieldsPreparer subclass could override the prepare method (https://github.com/toastdriven/restless/blob/master/restless/preparers.py#L42-L60) & change behavior based on if the lookup is a dict or a string.

I'm still thinking about if I want to support this natively (maybe a NestedFieldsPreparer). Possibly in Restless 2.1.0.

[schmitch]

It would be great if you would support this natively since i think that feature will be used very frequently!

[Morpho]

Would be a great feature. Right now I manually build the json dict as suggested in #11 (comment)

[seocam]

I'm working on that in the branch subpreparers (or something similar to that). Stay tuned!

[seocam]

This was merged today. Restless 2.1 will be released in a bit! Thanks for the feature request @marcio0!