Allow field's spec properties

[Garito]

Hi!
I created a small patch to allow OpenAPI spec properties besides extensions:
https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md#schema-object

Please let me know if the code is good enough so I can add testing to it

Thanks

[s-knibbs]

I should explain that I only defined the generic keywords on JsonSchemaMeta which apply to any type.

The other keywords such as pattern, maximum and minimum only apply to specific types and are better handled via the type system. There's an example that makes use of pattern by using a NewType.

I've also created #95 to look at supporting python sets which would make use of uniqueItems.

[Garito]

Yeah, I've seen it
I've done one for the mongo's ObjectId, Email etc
The question is, for me, how to parametrize it (maximum example)

[s-knibbs]

Maybe if you could provide an example? You can pass parameters to the field encoders though, the decimal field allows you to specify the decimal precision for example.

[Garito]

Should I create a FileEncoder for all the native fields then?
Every numeric type needs to allow to specify maximum and minimum, for instance
I don't understand where the confusion is, sorry

[Garito]

So, what is going to be?
How do you think we should deal with a number field with minimum 0 maximum 150?