使用 Form.has_changed() 验证 Django UpdateView

Question

我正在尝试 post 当 UpdateView 中的一个或多个值发生更改时发送消息。这可能与 Form.has_changed() 与此通用视图有关吗？例如：

class MyUpdateView(UpdateView):
    model = MyModel
    form = MyModelForm
    fields = "__all__"
    template_name = "mymodel_form.html"

    if form.has_changed():
        logger.info("Some values have changed")

Answer 1

您可以为此覆盖 .form_valid(…) method ^[Django-doc]：

class MyUpdateView(UpdateView):
    model = MyModel
    form_class = MyModelForm
    fields = '__all__'
    template_name = 'mymodel_form.html'

    def <strong>form_valid</strong>(self, form):
        if form.has_changed():
            logger.info('Some values have changed')
        return super().form_valid(form)

或者如果您想要在表单可能无效的情况下记录更改，您可以使用 .get_form(…) ^[Django-doc]:

class MyUpdateView(UpdateView):
    model = MyModel
    form_class = MyModelForm
    fields = '__all__'
    template_name = 'mymodel_form.html'

    def <strong>get_form</strong>(self, form_class=None):
        form = super().get_form(form_class=form_class)
        if form.has_changed():
            logger.info('Some values have changed')
        return form

使用 Form.has_changed() 验证 Django UpdateView

Use Form.has_changed() validation with Django UpdateView

django

django-forms

django-views