Django表单模板错误

时间:2011-11-30 15:08:19

标签: django forms templates

我自己写了一份表格:

class Autopoweroff_Form(forms.Form):
    autopoweroff_groups = forms.CharField(required=True)
    autopoweroff_groups_hosts = forms.CharField(required=True)
    autopoweroff_groups_start = forms.CharField(required=True)
    autopoweroff_groups_end = forms.CharField(required=True)
    autopoweroff_groups_startup_delay = forms.CharField(required=True)
    autopoweroff_groups_idle_time = forms.CharField(required=True)

现在我知道我不必明确设置reuqired = True,但现在请耐心等待。 无论如何,让我们继续。

既然我讨厌在视图中进行验证等等,我只是为该表单定义了更新函数:

    def update(self, data):
        if not self.is_bound and data is not None:
            raise Exception()

        if self.is_valid():
            curr_group = self.cleaned_data['autopoweroff_groups']
            ...

然后在我的视图中称之为:

if request.method == 'POST':
        form = Autopoweroff_Form(data=request.POST)
        form.update(data=request.POST)
        return HttpResponseRedirect('/admin/thin/create_autopoweroff')
    else:
        form = Autopoweroff_Form()

    ...

现在的问题是,如果我没有在表单中键入任何内容,表单将按原样返回,而不会显示任何错误。我也知道它不会做任何事情,因为:

https://docs.djangoproject.com/en/1.3/ref/forms/validation/

  

事实上,如果表单中有任何错误,Django目前将完全清除cleaning_data字典。但是,此行为可能在将来发生变化,因此不是>首先要清理自己的坏主意。

如果我尝试:

def update(self, data):
        if not self.is_bound and data is not None:
            raise Exception()

        if self.is_valid():
            curr_group = self.cleaned_data['autopoweroff_groups']
            ...
        else:
            print self.errors

我得到了我希望在模板中看到的错误。 我也试过了:

def clean_autopoweroff_groups(self):
        autopoweoff_groups = self.cleaned_data.get('autopoweroff_groups', "")
        if autopoweoff_groups == '':
            print "Validation Error"
            raise forms.ValidationError('Please Enter A Name')
        return autopoweroff_groups

我究竟做错了什么?

更新: 在我看来:

    if request.method == 'POST':
        form = Autopoweroff_Form(data=request.POST)

        if form.is_valid():
            form.update(data=request.POST)
            return HttpResponseRedirect('/admin/thin/create_autopoweroff')
    else:
        form = Autopoweroff_Form()

并在我的表单中删除self.is_valid()

1 个答案:

答案 0 :(得分:0)

Django已经内置验证,因此您无需重写它:

class Autopoweroff_Form(forms.Form):
    # I suggest not prefixing your fields with the name of the class
    groups = forms.CharField(required=True)
    hosts = forms.CharField(required=True)
    start = forms.CharField(required=True)
    end = forms.CharField(required=True)
    delay = forms.CharField(required=True)
    idle_time = forms.CharField(required=True)

并在您看来:

if request.method == 'POST':
    form = Autopoweroff_Form(data=request.POST)
    if form.is_valid():
        return HttpResponseRedirect('/admin/thin/create_autopoweroff')
else:
    form = Autopoweroff_Form()

请注意,您在视图中调用is_valid(),而不是表单。

如果要对单个字段或字段分组执行更复杂的验证,可以覆盖表单clean()clean_[field_name]()方法。

见这里:

https://docs.djangoproject.com/en/dev/ref/forms/validation/#cleaning-a-specific-field-attribute