d2b80dacc4
- Set up FastAPI application structure - Create database models for User, Product, Cart, CartItem, Order, and OrderItem - Set up Alembic for database migrations - Create Pydantic schemas for request/response models - Implement API endpoints for products, cart operations, and checkout process - Add health endpoint - Update README with project details and documentation
85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
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from fastapi.encoders import jsonable_encoder
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from pydantic import BaseModel
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from sqlalchemy.orm import Session
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from app.db.session import Base
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ModelType = TypeVar("ModelType", bound=Base)
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CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
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UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
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class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
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"""
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CRUD base class with default methods to Create, Read, Update, Delete (CRUD).
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**Parameters**
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* `model`: SQLAlchemy model class
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* `schema`: Pydantic model (schema) class
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"""
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def __init__(self, model: Type[ModelType]):
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"""
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Initialize with SQLAlchemy model.
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"""
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self.model = model
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def get(self, db: Session, id: int) -> Optional[ModelType]:
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"""
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Get a record by ID.
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"""
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return db.query(self.model).filter(self.model.id == id).first()
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def get_multi(
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self, db: Session, *, skip: int = 0, limit: int = 100
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) -> List[ModelType]:
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"""
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Get multiple records.
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"""
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return db.query(self.model).offset(skip).limit(limit).all()
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def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
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"""
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Create a new record.
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"""
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obj_in_data = jsonable_encoder(obj_in)
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db_obj = self.model(**obj_in_data)
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db.add(db_obj)
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db.commit()
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db.refresh(db_obj)
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return db_obj
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def update(
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self,
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db: Session,
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*,
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db_obj: ModelType,
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obj_in: Union[UpdateSchemaType, Dict[str, Any]]
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) -> ModelType:
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"""
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Update a record.
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"""
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obj_data = jsonable_encoder(db_obj)
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if isinstance(obj_in, dict):
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update_data = obj_in
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else:
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update_data = obj_in.model_dump(exclude_unset=True)
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for field in obj_data:
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if field in update_data:
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setattr(db_obj, field, update_data[field])
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db.add(db_obj)
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db.commit()
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db.refresh(db_obj)
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return db_obj
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def remove(self, db: Session, *, id: int) -> ModelType:
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"""
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Remove a record.
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"""
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obj = db.query(self.model).get(id)
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db.delete(obj)
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db.commit()
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return obj |