Schema validation & annotation about apistar HOT 13 CLOSED

@ddorian We can't use marshmallow (or any other existing library) here because they wouldn't fulfil our design criteria of:

• Actual type subclasses, that we can then validly use as type annotations.
• 1:1 mapping onto JSON Schema.

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May I suggest PyDantic?
It supports type annotations out of the box and type subclasses.
It's pretty young but so is APIStar so it's still a good opportunity to switch.

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Is there any movement on Nullable? Or is there a workaround? I'm trying to setup apistar with SQLAlchemy and I get validation errors when None is passed to a schema, even if there is a default. I can't figure out any way to make it work.

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APIStar is a very enjoyable framework with a lot of nice ideas.

@thedrow I just made a library to APIStar use PyDantic as typesystem. Seems fine to me, I really liked it. https://github.com/pslacerda/apistar_pydantic/

Enum and list needs more testing. Optional (or nullable) , Union and recursive models support aren't done yet.

Maybe you should use Optional for nullable fields, but maybe is better to add Object(nullable=True) as it look less ugly.

Keep the good work!

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... why not just use marshmallow ? Aren't you doing too much this way (like django with friends) ?
The same for swagger etc.

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Not yet, tho certainly on the immediate roadmap yup.
Sketching out next steps, here... https://github.com/encode/apistar/projects/1

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required will be a future argument?

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Most likely that, or something similar yes, but needs some thinking about first.

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Is there any way to define a schema property as read only? I am needing that to use in a property like 'id', to prevent user send an id in a create / post method.

p.s: So far APIStar is the best api framework I've ever seen and used.

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Any plans yet to add a way to make a field be required? I've tried typesystem.string(min_length=1) and it seems to allow missing a field.

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Aha, I found the required option for typesystem.Object.

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Any progress on supporting nullable? typesystem.Object would become really useful with it.

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Will it be possible to use Union as a type?

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