向ModelForm添加额外的字段(add extra field to ModelForm)

向ModelForm添加额外的字段(add extra field to ModelForm)

我正在给Django ModelForm添加一个额外的字段：

class form(forms.ModelForm): extra_field = forms.CharField(label='Name of Institution') class Meta: model = db_institutionInstitution fields = ['conn_kind','time','inst_name2']

表格实际上工作正常，但我不能预先填充它。 我在modelformset_factory使用它：

formset = modelformset_factory(db_institutionInstitution,form=form)

我手动运行一个查询集，并在formset中的附加表单所需的字典中添加条目。 但是，当我打电话时：

formset1 = formset(prefix='brch',queryset=qs1)

extra_field没有像预期的那样预填充（其余的工作正常）。

谁能帮忙？

I am adding an extra field to a Django ModelForm like that:

class form(forms.ModelForm): extra_field = forms.CharField(label='Name of Institution') class Meta: model = db_institutionInstitution fields = ['conn_kind','time','inst_name2']

The form is actually working fine, but I cant prepopulate it. I use it in a modelformset_factory:

formset = modelformset_factory(db_institutionInstitution,form=form)

I manually run through a queryset and add the entry in the dictionary needed for the additional form in the formset. However, when I call:

formset1 = formset(prefix='brch',queryset=qs1)

the extra_field is not prepopulated as intended (the rest is working fine).

Can anyone help?

最满意答案

如果你想设置一个默认值。

extra_field = forms.CharField(label='Name of Institution', default="harvard")

如果你想动态设置一个值：

def __init__(self, *args, **kwargs): super(form,self).__init(*args, **kwargs) self.fields['extra_field'].initial = "harvard"

If you want to set a default.

extra_field = forms.CharField(label='Name of Institution', initial="harvard")

If you want to dynamically set a value:

def __init__(self, *args, **kwargs): super(form,self).__init(*args, **kwargs) self.fields['extra_field'].initial = "harvard"