Cheng Zhou
48 lines
2.1 KiB
Python
48 lines
2.1 KiB
Python
import enum
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import uuid
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from datetime import datetime
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from sqlalchemy import DateTime, Enum, ForeignKey, Integer, UniqueConstraint, func
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from sqlalchemy.dialects.postgresql import UUID
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.db.base_class import Base
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class WorkflowStatus(str, enum.Enum):
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PENDING = "PENDING"
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APPROVED = "APPROVED"
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REJECTED = "REJECTED"
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CANCELED = "CANCELED"
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class VersionWorkflow(Base):
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__tablename__ = "version_workflows"
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__table_args__ = (UniqueConstraint("version_id", name="uq_version_workflow_version"),)
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id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
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document_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("documents.id"), nullable=False)
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version_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("document_versions.id"), nullable=False)
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template_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("workflow_templates.id"), nullable=False)
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status: Mapped[WorkflowStatus] = mapped_column(
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Enum(WorkflowStatus, name="workflow_status"),
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nullable=False,
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server_default=WorkflowStatus.PENDING.value,
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)
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current_node: Mapped[int | None] = mapped_column(Integer, nullable=True)
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submitted_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
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submitted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
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updated_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True),
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nullable=False,
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server_default=func.now(),
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onupdate=func.now(),
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)
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template = relationship("WorkflowTemplate")
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version = relationship("DocumentVersion", back_populates="workflow_instance")
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document = relationship("Document")
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actions = relationship("WorkflowAction", back_populates="workflow", cascade="all, delete-orphan")
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