20 lines
667 B
Python
20 lines
667 B
Python
"""班级 <-> 老师 多对多中间表。
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单独放一个文件是为了让 clazz.py / teacher.py 都能引用它，
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又不会互相 import 形成环。
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"""
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from __future__ import annotations
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from sqlalchemy import Column, ForeignKey, Table
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from app.model.base import Base
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class_teachers = Table(
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"class_teachers",
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Base.metadata,
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Column("class_id", ForeignKey("clazz.id", ondelete="CASCADE"), primary_key=True, comment="班级ID"),
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Column("teacher_id", ForeignKey("teacher.id", ondelete="CASCADE"), primary_key=True, comment="老师ID"),
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comment="班级-授课老师 关联表（一个班多个授课老师，一个老师带多个班）",
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)
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