init commit

backend/app/models/item.py

@@ -0,0 +1,40 @@
+from uuid import UUID
+from uuid import uuid4
+
+from sqlmodel import Field
+from sqlmodel import Relationship
+from sqlmodel import SQLModel
+
+from app.models.user import User
+
+from .links import ItemUserLink
+
+
+class Item(SQLModel, table=True):
+    id: UUID = Field(primary_key=True, default_factory=uuid4)
+    title: str = Field(nullable=False)
+    price: float = Field(nullable=False)
+
+    assigned_to: list['User'] = Relationship(
+        back_populates='items', link_model=ItemUserLink
+    )
+    transaction_id: UUID = Field(foreign_key='transaction.id')
+    transaction: 'Transaction' = Relationship(back_populates='items')
+
+    def assign_user(self, user: User):
+        self.assigned_to.append(user)
+
+
+class OutputItem(SQLModel):
+    id: UUID
+    title: str
+    price: float
+    assigned_to: list['User']
+    transaction_id: UUID
+
+
+class ItemRequest(SQLModel):
+    title: str
+    price: float
+
+    all_users_selected: bool = False