Conatum
56f66ec7d4
New Column field types. Allow Column to be an attribute of a non-rowmodel. Add `references` field to Column. Add logging for registry attach. Add support for alternative join types.
33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
# from enum import Enum
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from typing import Optional
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from psycopg.types.enum import register_enum, EnumInfo
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from .registry import Attachable, Registry
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class RegisterEnum(Attachable):
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def __init__(self, enum, name: Optional[str] = None, mapper=None):
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super().__init__()
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self.enum = enum
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self.name = name or enum.__name__
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self.mapping = mapper(enum) if mapper is not None else self._mapper()
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def _mapper(self):
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return {m: m.value[0] for m in self.enum}
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def attach_to(self, registry: Registry):
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self._registry = registry
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registry.init_task(self.on_init)
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return self
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async def on_init(self, registry: Registry):
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connector = registry._conn
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if connector is None:
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raise ValueError("Cannot initialise without connector!")
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connection = await connector.get_connection()
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if connection is None:
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raise ValueError("Cannot Init without connection.")
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info = await EnumInfo.fetch(connection, self.name)
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if info is None:
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raise ValueError(f"Enum {self.name} not found in database.")
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register_enum(info, connection, self.enum, mapping=list(self.mapping.items()))
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