我有一个自定义FormView类的mixin,如果保存成功,它仅添加一条成功消息,因此:
class MessagesMixin(object):
def form_valid(self, form):
response = super(MessagesMixin, self).form_valid(form)
messages.add_message(self.request,
messages.SUCCESS,
'Successfully created %s' % form.instance)
return response
如您所见,这实际上只涉及创建。如果实例已更新,则消息仍将显示“已创建”。有没有办法在form_valid方法中区分创建/更新?
一种解决方案是将一个属性添加到您的mixin,然后在您的Update
和Create
视图中设置它。您可以定义静态属性,也可以在get_form_valid_msg
需要动态内容的情况下重载它们。未经测试的代码:
from django.core.exceptions import ImproperlyConfigured
class MessagesMixin(object):
@property
def form_valid_msg(self):
raise ImproperlyConfigured("you're missing the 'form_valid_msg' property")
def get_form_valid_msg(self):
return self.form_valid_msg
def form_valid(self, form):
response = super(MessagesMixin, self).form_valid(form)
msg = 'Successfully {form_valid_msg} {form}'.format(
form_valid_msg=self.get_form_valid_msg(),
form=form.instance
)
messages.success(self.request, msg)
return response
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