[BUG] @model_validator(mode="before") issue

[shughes-uk]

Describe the bug

When using something like this, values is a DjangoGetter instance which is somewhat unexpected to me. Prior to 1.0 and the pydantic update you would get a plain dictionary.

class SomeSchema(Schema):
     somevar:int

    @model_validator(mode="before")
    @classmethod
    def foo(cls, values):
        values.get("something")

Versions (please complete the following information):

• Python version: 3.10
• Django version: 4.1
• Django-Ninja version: 1.0.1
• Pydantic version: 2.5.1

[vitalik]

Note to myself: maybe adding dict methods to DjangoGetter will work

[agraham-oni]

Hey @vitalik, any word on this? We're trying to upgrade to 1.1.0 and blocked by this. Thinking of submitting a PR depending on complex it is.