Compatibility with drf-yasg

[q0w]

ProjectionSerializer does not have a label attribute, so drf-yasg fails:

AttributeError: 'ProjectionSerializer' object has no attribute 'label'

[j4mie]

Hi,

I don't think this is going to be an easy fix, because the ProjectionSerializer doesn't know anything at all about what it's serializing. We might be able to silence the error, but even if we did the schema would be empty/meaningless.

I'm currently thinking about how django-readers might work with schemas. It's not simple because we (deliberately) don't consider types in our specs currently, and because of the way the library is designed we can't statically introspect the types from the underlying models easily. This will be a long-term piece of work I imagine, but I'll leave this issue open for now just so we can track it.

Thanks!

[j4mie]

#76 should give you everything you need to make this work 🎉 closing for now, please let me know if you have any issues.