56 lines
2 KiB
Python
56 lines
2 KiB
Python
from sqlalchemy import Column, Integer, DateTime, Boolean, String, JSON, func
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from sqlalchemy.orm import declarative_mixin, declarative_base
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Base = declarative_base()
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@declarative_mixin
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class CRUDMixin:
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id = Column(Integer, primary_key=True)
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created_at = Column(DateTime, default=func.now(), nullable=False)
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updated_at = Column(DateTime, default=func.now(), nullable=False, onupdate=func.now())
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def as_dict(self, fields: list[str] | None = None):
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"""
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Serialize the instance.
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- If 'fields' (possibly dotted) is provided, emit exactly those keys.
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- Else, if '__crudkit_projection__' is set on the instance, emit those keys.
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- Else, fall back to all mapped columns on this class hierarchy.
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Always includes 'id' when present unless explicitly excluded.
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"""
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if fields is None:
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fields = getattr(self, "__crudkit_projection__", None)
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if fields:
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out = {}
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if "id" not in fields and hasattr(self, "id"):
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out["id"] = getattr(self, "id")
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for f in fields:
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cur = self
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for part in f.split("."):
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if cur is None:
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break
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cur = getattr(cur, part, None)
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out[f] = cur
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return out
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result = {}
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for cls in self.__class__.__mro__:
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if hasattr(cls, "__table__"):
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for column in cls.__table__.columns:
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name = column.name
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result[name] = getattr(self, name)
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return result
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class Version(Base):
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__tablename__ = "versions"
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id = Column(Integer, primary_key=True)
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model_name = Column(String, nullable=False)
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object_id = Column(Integer, nullable=False)
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change_type = Column(String, nullable=False)
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data = Column(JSON, nullable=True)
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timestamp = Column(DateTime, default=func.now())
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actor = Column(String, nullable=True)
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meta = Column('metadata', JSON, nullable=True)
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