django - 保存前更改表单字段值

Question

我有一个表格:

class ReferencesForm(forms.ModelForm):

    error_css_class = 'error'   #set some css when an error
    contactName = forms.CharField(label='Contact Name:')
    company = forms.CharField(label='Company:')
    address = forms.CharField(label='Address:')
    telephoneNumber = forms.CharField(label='Telephone Number:')

    class Meta:
        fields = '__all__'
        model = References

    def __init__(self, *arg, **kwarg):
        super(ReferencesForm, self).__init__(*arg, **kwarg)
        self.empty_permitted = True
    def clean(self):
        """ Custom validation for fields
        """
        cleaned_data = super(ReferencesForm, self).clean()

        return self.cleaned_data  

并在我的 View 文件中构建它，如下所示:

ReferencesInlineFormSet = inlineformset_factory(
        Applicant, References, form=ReferencesForm, extra=1, can_delete=False)
...
if request.method == 'POST':
    references_formset = ReferencesInlineFormSet(
        request.POST, instance=applicant)

    if (references_formset.is_valid()):
        references_formset.instance['address'] = "test";
        references_formset.save();

我认为申请人模型在这里并不重要，但如有必要，我可以稍后添加。

我想将一些地址字段(addr1、addr2、town 等)合并到一个名为“address”的数据库字段中，并且正在考虑在 View 文件中这样做。

我在这里尝试了一个带有“test”的简单分配，但收到了错误:

'Applicant' object does not support item assignment
references_formset.instance['address'] = "test"; 

Answer 1

你可以使用这样的东西:

if form.is_valid():
    obj = form.save(commit=False)
    obj.address = "test"
    obj.save()