feat: departments and department sections

models/auth.py

@@ -31,6 +31,13 @@ user_pay_rate = Table(
     Column('user_id', ForeignKey('users.id'), primary_key=True, unique=True)
 )
 
+user_department_section = Table(
+    'user_department_section',
+    BaseModel.metadata,
+    Column('department_section_id', ForeignKey('department_sections.id'), primary_key=True),
+    Column('user_id', ForeignKey('users.id'), primary_key=True)
+)
+
 
 class Permission(BaseModel):
     __tablename__ = 'permissions'
@@ -135,3 +142,33 @@ class PassportImage(BaseModel):
     user: Mapped["User"] = relationship(back_populates='passport_images')
 
     image_url: Mapped[str] = mapped_column(nullable=False)
+
+
+class Department(BaseModel):
+    __tablename__ = 'departments'
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(unique=True)
+
+    sections: Mapped[list['DepartmentSection']] = relationship(
+        back_populates='department',
+        lazy='selectin',
+        cascade='all, delete',
+    )
+
+
+class DepartmentSection(BaseModel):
+    __tablename__ = 'department_sections'
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(index=True)
+
+    department_id: Mapped[int] = mapped_column(ForeignKey('departments.id'))
+    department: Mapped["Department"] = relationship(
+        back_populates='sections',
+        lazy='selectin',
+    )
+
+    users: Mapped[list[User]] = relationship(
+        'User',
+        secondary=user_department_section,
+        uselist=True,
+    )