Fix custom field support and add include_from_annotations.

[phbernardes]

Hi,

This PR will:

• Add support to include_from_annotations as shown in README and test_include_from_annotations.
• Fix the error shown in test_multiple_level_relations where a custom field (user_cache in this example) is present in the Schema.

Thank you.

[jordaneremieff]

Hi @phbernardes, thanks for the PR!

I think this is a good idea, but prefer to handle the include from annotations case without introducing a new configuration flag. Currently a config error will be raised if both include and exclude are defined, but the behavior in the proposed changes would be inconsistent with that expectation. We could solve this by introducing additional validations to check when both the flag and include or exclude options are provided, but even still I think we ought to keep the amount of custom Djantic options in the config minimal.

What do you think about something like a special "__annotations__" string that could be set as the include to implement this behaviour?

For example:

class ProfileSchema(ModelSchema):
    
    website: str

    class Config:
        model = Profile
        include = "__annotations__"

[phbernardes]

Hi @phbernardes, thanks for the PR!

I think this is a good idea, but prefer to handle the include from annotations case without introducing a new configuration flag. Currently a config error will be raised if both include and exclude are defined, but the behavior in the proposed changes would be inconsistent with that expectation. We could solve this by introducing additional validations to check when both the flag and include or exclude options are provided, but even still I think we ought to keep the amount of custom Djantic options in the config minimal.

What do you think about something like a special "__annotations__" string that could be set as the include to implement this behaviour?

For example:

class ProfileSchema(ModelSchema):
    
    website: str

    class Config:
        model = Profile
        include = "__annotations__"

Hi @jordaneremieff, thanks for this review. Good point, implemented it in 3a15978.

[phbernardes]

@jordaneremieff, thank you for merging this. Can you please create a release?

[jordaneremieff]

@phbernardes sure, will do this week.