34 lines
1.6 KiB
Python
34 lines
1.6 KiB
Python
from sqlalchemy import Float, ForeignKey, Index, String
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from sqlalchemy.orm import Mapped, mapped_column
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from app.models.base import Base, TimestampMixin
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class CreditRecord(Base, TimestampMixin):
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__tablename__ = "credit_records"
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__table_args__ = (
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# 正式计费幂等键：同一用户同一个业务流水只能写入一次。
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# PostgreSQL/MySQL/SQLite 对 nullable unique 的处理都允许多条 NULL，兼容历史数据。
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Index("uq_credit_records_user_biz_key", "user_id", "biz_key", unique=True),
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Index("ix_credit_records_user_refund_for_biz_key", "user_id", "refund_for_biz_key"),
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Index("ix_credit_records_related_type", "related_id", "type"),
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)
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id: Mapped[str] = mapped_column(String(32), primary_key=True)
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user_id: Mapped[str] = mapped_column(
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String(32), ForeignKey("users.id", ondelete="CASCADE"), index=True
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)
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type: Mapped[str] = mapped_column(String(16))
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amount: Mapped[float] = mapped_column(Float)
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balance_after: Mapped[float] = mapped_column(Float)
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description: Mapped[str] = mapped_column(String(256))
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related_id: Mapped[str | None] = mapped_column(String(64), nullable=True)
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# 当前积分流水自己的业务幂等键。
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# 例如：generation_record:{record_id}:attempt:1:media:charge
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biz_key: Mapped[str | None] = mapped_column(String(160), nullable=True, index=True)
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# 如果当前流水是退款，记录它退的是哪一次扣费。
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# 例如：generation_record:{record_id}:attempt:1:media:charge
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refund_for_biz_key: Mapped[str | None] = mapped_column(String(160), nullable=True, index=True)
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