Django form.clean(),cleaned_data KeyError

In Django 1.4 documentation, it says that clean_<fieldname> methods are run first, then form clean method is executed.

在Django 1.4文档中，它说clean_ 方法首先运行，然后执行form clean方法。

I have the following code sample. The form is used with FormPreview. When pmid field is empty in the form, it should throw ValidationError exception, but it doesn't happen.

我有以下代码示例。表单与FormPreview一起使用。当pmid字段为空时，它应该抛出ValidationError异常，但它不会发生。

class MyForm(forms.Form):
    pmid = forms.CharField()
    .. other fields ..

    def clean(self):
        cd = super(MyForm, self).clean()
        cd['pmid'] # returns KeyError and it's not in cd
        return cd

I don't override any clean_<field> method.

我不重写任何clean_ 方法。

1 个解决方案

#1

First, if all you want to do is ensure a field is not blank, then just add required=True to it. For example:

首先，如果您要做的只是确保字段不是空的，那么只需添加required=True即可。例如:

class MyForm(forms.Form):
    pmid = forms.CharField(required=True)
    ...

And you're done.

你就完成了。

However, even if you couldn't do it that way, you still wouldn't validate it in clean, but in clean_<fieldname> as the docs describe.

然而，即使您不能那样做，您仍然不会在clean中验证它，而是在如文档所描述的clean_ 中验证它。

def clean_pmid(self):
    pmid = self.cleaned_data.get('pmid')
    if not pmid:
        raise forms.ValidationError('pmid cannot be blank')
    return pmid

#1