add cart entity models

Author: lordlabakdas

models/entity/cart_entity.py

@@ -0,0 +1,16 @@
+from datetime import datetime
+from typing import Optional, List
+from uuid import UUID, uuid4
+from sqlmodel import Field, SQLModel
+from models.entity.cart_item_entity import CartItemEntity
+
+
+class CartEntity(SQLModel, table=True   ):
+    id: Optional[UUID] = Field(default_factory=uuid4, primary_key=True)
+    user_id: UUID = Field(foreign_key="user.id")
+    items: List[CartItemEntity] = Field(default=[])
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
+    total_price: float = Field(default=0.0)
+    total_quantity: int = Field(default=0)
+    notes: Optional[str] = None

models/entity/cart_item_entity.py

@@ -0,0 +1,14 @@
+from datetime import datetime
+from typing import Optional
+from uuid import UUID, uuid4
+from sqlmodel import Field, SQLModel
+
+class CartItemEntity(SQLModel, table=True):
+    id: Optional[UUID] = Field(default_factory=uuid4, primary_key=True)
+    cart_id: UUID = Field(foreign_key="cartentity.id")
+    inventory_id: UUID = Field(foreign_key="inventory.id")
+    quantity: int = Field(default=1) 
+    price: float = Field(default=0.0)
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
+    notes: Optional[str] = None