Cheng Zhou
61 lines
3.0 KiB
Python
61 lines
3.0 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 BigInteger, DateTime, Enum, ForeignKey, String, Text, 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 DocumentVersionStatus(str, enum.Enum):
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DRAFT = "DRAFT"
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SUBMITTED = "SUBMITTED"
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APPROVED = "APPROVED"
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EFFECTIVE = "EFFECTIVE"
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SUPERSEDED = "SUPERSEDED"
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ARCHIVED = "ARCHIVED"
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WITHDRAWN = "WITHDRAWN"
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class DocumentVersion(Base):
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__tablename__ = "document_versions"
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__table_args__ = (UniqueConstraint("document_id", "version_no", name="uq_document_versions_doc_no"),)
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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_no: Mapped[str] = mapped_column(String(50), nullable=False)
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parent_version_id: Mapped[uuid.UUID | None] = mapped_column(
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UUID(as_uuid=True),
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ForeignKey("document_versions.id"),
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nullable=True,
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)
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derived_from_version_id: Mapped[uuid.UUID | None] = mapped_column(
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UUID(as_uuid=True),
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ForeignKey("document_versions.id"),
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nullable=True,
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)
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status: Mapped[DocumentVersionStatus] = mapped_column(
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Enum(DocumentVersionStatus, name="document_version_status"),
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nullable=False,
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server_default=DocumentVersionStatus.DRAFT.value,
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)
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effective_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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superseded_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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file_uri: Mapped[str] = mapped_column(String(500), nullable=False)
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file_hash: Mapped[str] = mapped_column(String(128), nullable=False)
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file_size: Mapped[int] = mapped_column(BigInteger, nullable=False)
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mime_type: Mapped[str | None] = mapped_column(String(100), nullable=True)
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change_summary: Mapped[str | None] = mapped_column(Text, nullable=True)
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created_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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approved_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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withdrawn_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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document = relationship("Document", back_populates="versions", foreign_keys=[document_id])
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parent_version = relationship("DocumentVersion", remote_side=[id], foreign_keys=[parent_version_id])
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derived_from_version = relationship("DocumentVersion", remote_side=[id], foreign_keys=[derived_from_version_id])
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distributions = relationship("Distribution", back_populates="version")
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