我会推荐一种自定义的 Widget 方法，HTML5 允许您使用带有下拉列表的自由文本输入，该下拉列表可以用作选择一个或写入其他类型的字段，这就是我的制作方法：
字段.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, renderer=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 django import forms
from myapp.fields import ListTextWidget
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=_country_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
})
