有一种非常简单的django方法。
像这样“记住”模型init中的值：
def __init__(self, *args, **kwargs): super(MyClass, self).__init__(*args, **kwargs) self.initial_parametername = self.parametername --- self.initial_parameternameX = self.parameternameX
现实生活中的例子：
上课时：
def __init__(self, *args, **kwargs): super(MyClass, self).__init__(*args, **kwargs) self.__important_fields = ['target_type', 'target_id', 'target_object', 'number', 'chain', 'expiration_date'] for field in self.__important_fields: setattr(self, '__original_%s' % field, getattr(self, field))def has_changed(self): for field in self.__important_fields: orig = '__original_%s' % field if getattr(self, orig) != getattr(self, field): return True return False
然后在modelform保存方法：
def save(self, force_insert=False, force_update=False, commit=True): # Prep the data obj = super(MyClassForm, self).save(commit=False) if obj.has_changed(): # If we're down with commitment, save this shit if commit: obj.save(force_insert=True) return obj
