feat: warehouse places accounting

models_wms/place.py

@@ -0,0 +1,60 @@
+from sqlalchemy import ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from models_wms.base import BaseModel
+
+
+class PlaceType(BaseModel):
+    __tablename__ = 'place_type'
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(nullable=False)
+    parent_id: Mapped[int] = mapped_column(
+        ForeignKey('place_type.id'),
+        nullable=True,
+    )
+    parent: Mapped['PlaceType'] = relationship(
+        'PlaceType',
+        lazy='noload',
+        back_populates='children',
+        primaryjoin='PlaceType.parent_id == PlaceType.id',
+        remote_side=[id],
+    )
+    children: Mapped[list['PlaceType']] = relationship(
+        'PlaceType',
+        lazy='selectin',
+        back_populates='parent',
+    )
+
+
+class Place(BaseModel):
+    __tablename__ = 'place'
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    number: Mapped[int] = mapped_column(nullable=False)
+
+    place_type_id: Mapped[int] = mapped_column(
+        ForeignKey('place_type.id'),
+        nullable=False,
+    )
+    place_type: Mapped[PlaceType] = relationship(
+        'PlaceType',
+        lazy='joined',
+    )
+
+    parent_id: Mapped[int] = mapped_column(
+        ForeignKey('place.id'),
+        nullable=True,
+    )
+    parent: Mapped['Place'] = relationship(
+        'Place',
+        lazy='noload',
+        back_populates='children',
+        primaryjoin='Place.parent_id == Place.id',
+        remote_side=[id],
+    )
+    children: Mapped[list['Place']] = relationship(
+        'Place',
+        lazy='selectin',
+        back_populates='parent',
+    )