# 一对多外键增删改查 # 增 # 1 直接写实际字段 id # models.Book.objects.create(title='论语',price=899.23,publish_id=1) # models.Book.objects.create(title='聊斋',price=444.23,publish_id=2) # models.Book.objects.create(title='老子',price=333.66,publish_id=1) # 2 虚拟字段 对象 # publish_obj = models.Publish.objects.filter(pk=2).first() # models.Book.objects.create(title='红楼梦',price=666.23,publish=publish_obj) # 删 # models.Publish.objects.filter(pk=1).delete() # 级联删除 # 修改 # models.Book.objects.filter(pk=1).update(publish_id=2) # publish_obj = models.Publish.objects.filter(pk=1).first() # models.Book.objects.filter(pk=1).update(publish=publish_obj)