问题描述
我已经在外键上定义了 cascade="all,delete-orphan"
并定义了 ondelete="CASCADE"
,但是当我删除与预订相关的客户行时,我仍然得到 "sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) FOREIGN KEY constraint Failed"
。
from sqlalchemy import Column,Integer,String,Table
from sqlalchemy.orm import relationship
from sqlalchemy.sql.schema import ForeignKey
from database import Base
class Customer(Base):
__tablename__ = "customers"
id = Column(Integer,primary_key=True,index=True)
name = Column(String)
type = Column(String)
booking = relationship("Booking",back_populates='customer',cascade="all,delete-orphan")
class Booking(Base):
__tablename__ = "bookings"
id = Column(Integer,index=True)
cid = Column(Integer,ForeignKey("customers.id",ondelete="CASCADE"),nullable=False)
name = Column(String)
type = Column(String)
customer = relationship('Customer',back_populates='booking')
@app.delete('/customer/{id}')
def destory(id,db:Session = Depends(get_db)):
customer=db.query(models.Customer).filter(models.Customer.id == id)
if not customer.first():
raise HTTPException(status_code=404,detail=f'Blog with the id {id} is not available '
)
#db.delete(customer.first())
customer.delete(synchronize_session=False)
db.commit()
return 'done'
解决方法
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