26 lines
1.0 KiB
Python
26 lines
1.0 KiB
Python
"""好友之树模型"""
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from datetime import datetime
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from sqlalchemy import String, Integer, DateTime, ForeignKey, UniqueConstraint
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.database import Base
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class FriendshipTree(Base):
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__tablename__ = "friendship_trees"
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__table_args__ = (
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UniqueConstraint("user_a_id", "user_b_id", name="uq_friendship_tree"),
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)
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id: Mapped[str] = mapped_column(String(36), primary_key=True)
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user_a_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"))
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user_b_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"))
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water_count: Mapped[int] = mapped_column(Integer, default=0)
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last_watered_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
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created_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.utcnow())
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user_a = relationship("User", foreign_keys=[user_a_id])
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user_b = relationship("User", foreign_keys=[user_b_id])
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