Non-null fields

[melinath]

GraphQL has a concept of Non-Null Types. This ticket covers fields, and not arguments.

Requirements

The parts of the Non-Null type documentation related to fields are covered by this ticket.

Non-Null needs to be represented as a "wrapping type" in relation to the API (for example when coercing a field value or introspecting the API), but would probably be better represented as null=False on field definitions to match Django conventions.

Exclusions

As validation does not yet exist in django-graph-api, validation of non-null arguments should not happen as part of this ticket.

[fugu13]

I'm going to take an attempt at this one here at PyCascades

[fugu13]

Pausing on this, if anyone wants to take it on. This requires either major restructuring or meta class manipulation.