Question

我有CharField的Django ModelForm，其中包含一组choices。我想为用户提供四个输入：我希望三个选项具有多个选项，最后一个是自由文本输入字段。有没有办法用一个具有两种不同输入样式的Field渲染一个ModelForm？

Answer 1

我认为您正在寻找修改模型表单中使用的小部件。记录here已经很好了。但是，这是一个快速的例子，应该是你正在寻找的。

class ExampleForm(forms.ModelForm):
    field_1 = forms.CharField(widget=forms.SelectMultiple(choices=FIELD_1_CHOICES))
    field_2 = forms.CharField(widget=forms.SelectMultiple(choices=FIELD_2_CHOICES))
    field_3 = forms.CharField(widget=forms.SelectMultiple(choices=FIELD_3_CHOICES))
    field_4 = forms.CharField(widget=forms.TextInput())

    class Meta:
        model = ExampleModel
        fields = ['field_1', 'field_2', 'field_3', 'field_4']

您需要为每个字段定义FIELD_1_CHOICES，并提供您想要提供的任何选项。此外，您不必为field_4执行该行，因为TextInput是CharField的默认小部件，但我将其添加为明确。

Answer 2

你可以使用这个自定义小部件来解决问题，HTML5允许你有一个带有下拉列表的自由文本输入，它可以作为一个选择或写入其他类型的字段，这就是我制作的方式它：

fields.py

from django import forms


class ListTextWidget(forms.TextInput):
    def __init__(self, data_list, name, *args, **kwargs):
        super(ListTextWidget, self).__init__(*args, **kwargs)
        self._name = name
        self._list = data_list
        self.attrs.update({'list':'list__%s' % self._name})

    def render(self, name, value, attrs=None):
        text_html = super(ListTextWidget, self).render(name, value, attrs=attrs)
        data_list = '<datalist id="list__%s">' % self._name
        for item in self._list:
            data_list += '<option value="%s">' % item
        data_list += '</datalist>'

        return (text_html + data_list)

forms.py

from myapp.fields import FormForm

class FormForm(forms.Form):
    char_field_with_list = forms.CharField(required=True)

    def __init__(self, *args, **kwargs):
        _country_list = kwargs.pop('data_list', None)
        super(FormForm, self).__init__(*args, **kwargs)

        # the "name" parameter will allow you to use the same widget more than once in the same
        # form, not setting this parameter differently will cuse all inputs display the
        # same list.
        self.fields['char_field_with_list'].widget = ListTextWidget(data_list=_data_list, name='country-list')

views.py

from myapp.forms import FormForm

def country_form(request):
    # instead of hardcoding a list you could make a query of a model, as long as
    # it has a __str__() method you should be able to display it.
    country_list = ('Mexico', 'USA', 'China', 'France')
    form = FormForm(data_list=country_list)

    return render(request, 'my_app/country-form.html', {
        'form': form
    })

如何将一个Django ModelForm CharField渲染为选择框和文本框？

2 个答案: