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from sqlalchemy import JSON, Integer, String, Text, UniqueConstraint
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from sqlalchemy.orm import Mapped, mapped_column
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from app.core.base_model import ModelMixin, TenantMixin, UserMixin
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class WorkflowModel(ModelMixin, TenantMixin, UserMixin):
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"""
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工作流定义：Vue Flow 画布序列化 + 拓扑分层并行执行
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"""
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__tablename__: str = "task_workflow"
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__table_args__ = (
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UniqueConstraint("tenant_id", "code", name="uq_task_workflow_code"),
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{"comment": "工作流定义表"},
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)
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__loader_options__: list[str] = ["created_by", "updated_by", "deleted_by", "tenant_by"]
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name: Mapped[str] = mapped_column(String(128), nullable=False, comment="流程名称")
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code: Mapped[str] = mapped_column(String(64), nullable=False, comment="流程编码")
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nodes: Mapped[list | None] = mapped_column(JSON, nullable=True, comment="VueFlow节点")
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edges: Mapped[list | None] = mapped_column(JSON, nullable=True, comment="VueFlow连接线")
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status: Mapped[int] = mapped_column(Integer, default=0, nullable=False, comment="状态(0:草稿 1:已发布 2:已归档)", index=True)
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description: Mapped[str | None] = mapped_column(Text, default=None, nullable=True, comment="备注")
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