39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
"""SeriesPage — ordered image membership for a series-kind Tag.
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A series IS a Tag with kind='series'; series_page gives it ordered pages.
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An image belongs to at most one series (UNIQUE image_id). Cover = the
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lowest page_number. page_number is an ordering key only (not unique) —
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reorder rewrites 1..N wholesale.
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"""
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from datetime import datetime
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from sqlalchemy import DateTime, ForeignKey, Integer, func
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from sqlalchemy.orm import Mapped, mapped_column
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from .base import Base
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class SeriesPage(Base):
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__tablename__ = "series_page"
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id: Mapped[int] = mapped_column(Integer, primary_key=True)
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series_tag_id: Mapped[int] = mapped_column(
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ForeignKey("tag.id", ondelete="CASCADE"), nullable=False, index=True
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)
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image_id: Mapped[int] = mapped_column(
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ForeignKey("image_record.id", ondelete="CASCADE"),
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nullable=False,
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unique=True,
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)
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page_number: Mapped[int] = mapped_column(Integer, nullable=False)
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created_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False, server_default=func.now()
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)
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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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