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RFC: Use annotations for parsing arguments #353

sloria opened this issue Jan 4, 2019 · 0 comments


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commented Jan 4, 2019

Add a decorator that will parse request arguments from the view function's type annotations.

I've built a working proof of concept of this idea in webargs-starlette.

async def index(request, name: str = "World"):
    return JSONResponse({"Hello": name})

A marshmallow Schema is generated from the annotations using Schema.TYPE_MAPPING to construct fields.

The code for use_annotations mostly isn't tied to Starlette and could be adapted for AsyncParser (and core.Parser when we drop Python 2 support).

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