24 lines
636 B
Python
24 lines
636 B
Python
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from collections.abc import Mapping
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from typing import Annotated, Any, Generic, TypeVar
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from django.db.models.base import Model
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# Really, we would like to use TypedDict as a bound, but it's not possible
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_Annotations = TypeVar("_Annotations", covariant=True, bound=Mapping[str, Any])
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class Annotations(Generic[_Annotations]):
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"""Use as `Annotations[MyTypedDict]`"""
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pass
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_T = TypeVar("_T", bound=Model)
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WithAnnotations = Annotated[_T, Annotations[_Annotations]]
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"""Alias to make it easy to annotate the model `_T` as having annotations
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`_Annotations` (a `TypedDict`).
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Use as `WithAnnotations[MyModel, MyTypedDict]`.
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"""
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