28 lines
769 B
Python
28 lines
769 B
Python
from sqlalchemy.ext.mutable import Mutable
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class MutableDict(Mutable, dict):
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@classmethod
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def coerce(cls, key, value):
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"Convert plain dictionaries to MutableDict."
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if not isinstance(value, MutableDict):
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if isinstance(value, dict):
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return MutableDict(value)
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# this call will raise ValueError
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return Mutable.coerce(key, value)
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else:
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return value
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def __setitem__(self, key, value):
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"Detect dictionary set events and emit change events."
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dict.__setitem__(self, key, value)
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self.changed()
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def __delitem__(self, key):
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"Detect dictionary del events and emit change events."
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dict.__delitem__(self, key)
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self.changed()
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