29 lines
794 B
Python
29 lines
794 B
Python
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from typing import ClassVar, Optional
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class ModelItem:
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main_key: ClassVar[str] = ""
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def __init_subclass__(cls) -> None:
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if not cls.main_key:
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raise ValueError("Must specify main_key str class attribute.")
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super().__init_subclass__()
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def __new__(cls, *_args, **_kwargs) -> "ModelItem":
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from .model import Model
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cls.parent_model: Optional[Model] = None
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return super().__new__(cls)
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def __setattr__(self, name: str, value) -> None:
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super().__setattr__(name, value)
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if name != "parent_model" and self.parent_model is not None:
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with self.parent_model._sync_lock:
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self.parent_model._changed = True
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def __delattr__(self, name: str) -> None:
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raise NotImplementedError()
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