38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
"""Ticket category model with self-referencing parent for sub-categories."""
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from __future__ import annotations
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from sqlalchemy import ForeignKey, Integer, String
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.core.database import Base
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class Category(Base):
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__tablename__ = "categories"
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id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
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type: Mapped[str] = mapped_column(
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String(20),
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nullable=False,
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comment="maintenance, cs, emergency",
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)
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name: Mapped[str] = mapped_column(String(100), nullable=False)
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parent_id: Mapped[int | None] = mapped_column(
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Integer,
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ForeignKey("categories.id"),
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nullable=True,
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)
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sla_urgency: Mapped[str | None] = mapped_column(
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String(10),
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nullable=True,
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comment="urgent, high, medium, low",
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)
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# self-referencing relationship
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children: Mapped[list[Category]] = relationship("Category", back_populates="parent", cascade="all, delete-orphan")
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parent: Mapped[Category | None] = relationship("Category", back_populates="children", remote_side="Category.id")
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def __repr__(self) -> str:
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return f"<Category {self.type}:{self.name}>"
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