Override field-level exclude

[couteau]

I may be missing something obvious, but I cannot find a way to include a field exporting a model (e.g., using dict()) if that field has been marked for exclusion in the model definition using the Field function. Here is a working example of what I've tried:

from pydantic import BaseModel, Field

class MyClass(BaseModel):
    foo: str
    bar: str | None = Field(default=None, exclude=True)

m = MyClass(foo="Foo", bar="Bar")

m.dict()                           # result: {'foo': 'Foo'} as expected
m.dict(include={"bar": True})      # result: {}, expected result: {'bar': 'Bar'}
m.dict(exclude={"bar": False})     # result: TypeError: Unexpected type of exclude value <class 'bool'>, expected result {'foo': 'Foo', 'bar': 'Bar'}
m.dict(exclude={"bar": None})      # result: {'foo': 'Foo'} 

In other words, once a field has been marked as excluded in the model definition, I have found no way to override that setting and include it with the model export. Is there a way to do this? Or is there some other approach (other than explicitly passing the list of fields to exclude every time I export the model, which does not work in my use case)?

[jimkring]

This is not my area of expertise, but I had an idea you might try. Can you change the configuration setting for that field and then invoke the “model_rebuild()” method on your model? I don’t recall if that’s the exact name of the method, but it’s similar. Hope that works for you and let me know.

[samuelcolvin]

model_rebuild() is new in V2/on main, there's no equivalent in v1.

[samuelcolvin]

I think this isn't possible in v1, it will be possible in V2.

[couteau]

Thank you. Looking forward to v2!

[mcndt]

How is this achieved in V2? Running into the same problem.