fix: Add logic for converting Schema to dict in @swag_from

[michaelbukachi]

This fixes #464

[michaelbukachi]

Hey @billyrrr, do you mind reviewing this?

[billyrrr]

Hey @billyrrr, do you mind reviewing this?

Definitely, but, to be honest, the code base of flasgger is difficult to be grasped in full even for me. I would have to review several usages of convert_schema method, or maybe even do a few refactors before being able to review or merge this change.

[michaelbukachi]

Hey @billyrrr, do you mind reviewing this?

Definitely, but, to be honest, the code base of flasgger is difficult to be grasped in full even for me. I would have to review several usages of convert_schema method, or maybe even do a few refactors before being able to review or merge this change.

I just copied the functionality from SwaggerView i.e

flasgger/flasgger/marshmallow_apispec.py

Line 103 in 4bdaed5

specs.update(convert_schemas(specs, definitions))

In swag_from marshmallow schemas were not being converted.