88 lines
3.0 KiB
Python
88 lines
3.0 KiB
Python
from typing import List, Optional
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from sqlalchemy.orm import Session
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from sqlalchemy.exc import IntegrityError
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from fastapi import HTTPException
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from app.database.models import Product
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from app.schemas.product import ProductCreate, ProductUpdate
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class ProductService:
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@staticmethod
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def get_all_products(db: Session) -> List[Product]:
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"""获取所有产品"""
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return db.query(Product).all()
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@staticmethod
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def get_product_by_id(db: Session, product_id: int) -> Optional[Product]:
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"""根据ID获取产品"""
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return db.query(Product).filter(Product.id == product_id).first()
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@staticmethod
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def create_product(db: Session, product_data: ProductCreate) -> Product:
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"""创建新产品"""
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try:
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db_product = Product(
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name=product_data.name,
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description=product_data.description,
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price=product_data.price,
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stock=product_data.stock
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)
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db.add(db_product)
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db.commit()
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db.refresh(db_product)
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return db_product
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except IntegrityError as e:
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db.rollback()
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error_msg = str(e.orig)
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if "name" in error_msg:
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raise HTTPException(status_code=409, detail="Product name already exists")
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else:
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raise HTTPException(status_code=409, detail="Data conflict")
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=500, detail="Internal server error")
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@staticmethod
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def update_product(db: Session, product_id: int, product_data: ProductUpdate) -> Optional[Product]:
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"""更新产品信息"""
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try:
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db_product = db.query(Product).filter(Product.id == product_id).first()
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if not db_product:
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return None
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update_data = product_data.model_dump(exclude_unset=True)
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for field, value in update_data.items():
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setattr(db_product, field, value)
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db.commit()
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db.refresh(db_product)
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return db_product
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except IntegrityError as e:
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db.rollback()
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error_msg = str(e.orig)
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if "name" in error_msg:
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raise HTTPException(status_code=409, detail="Product name already exists")
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else:
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raise HTTPException(status_code=409, detail="Data conflict")
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=500, detail="Internal server error")
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@staticmethod
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def delete_product(db: Session, product_id: int) -> bool:
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"""删除产品"""
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try:
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db_product = db.query(Product).filter(Product.id == product_id).first()
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if not db_product:
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return False
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db.delete(db_product)
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db.commit()
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return True
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=500, detail="Internal server error")
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product_service = ProductService() |