16 lines
751 B
Python
16 lines
751 B
Python
"""统一编号序列（bre_sequence）—— 仅被 NumberGenService 直接写入，无业务 CRUD 端点。"""
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from sqlalchemy import BigInteger, String
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from sqlalchemy.orm import Mapped, mapped_column
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from app.core.base_model import ModelMixin, MappedBase
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class SequenceModel(ModelMixin, MappedBase):
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"""原子取号计数器：name 唯一，current_seq 记录最近一次已发序号。"""
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__tablename__ = "bre_sequence"
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__table_args__ = () # 计数器表无 status 列，禁用 ModelMixin 默认的 status 索引
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name: Mapped[str] = mapped_column(String(128), unique=True, nullable=False, comment="序列名")
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current_seq: Mapped[int] = mapped_column(BigInteger, nullable=False, default=0, comment="最近已发序号")
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