我有一个名为ipts
字段的Django表单,默认情况下其内容为choices=(('', '-'*20),)
。
在UpdateView
中,我使用更多选项扩展此列表。
因此,在get_context_data
我得到表单并扩展该列表。
choices = form.fields['ipts'].choices
choices = choices.extend( [('IPTS-123', 'IPTS-454545'),] )
为了确保选项填充得很好,我在render_to_response
方法中打印了form.fields['ipts'].choices
,我得到了我的期望:
[('', '--------------------'), ('IPTS-123', 'IPTS-454545')]
但是模板没有填充这些选项!只需初始值可供选择:('', '--------------------')
如何在基于类的视图中扩展选择字段?
欢迎提出建议。感谢。
修改
这里是视图代码:
class ProfileReductionUpdate(LoginRequiredMixin, SuccessMessageMixin,
UpdateView):
'''
'''
model = UserProfile
form_class = UserProfileReductionForm
template_name = 'users/profile_reduction_form.html'
# fields = '__all__'
success_url = reverse_lazy('index')
success_message = "Your Profile for the Reduction was updated successfully."
def get(self, request, *args, **kwargs):
print("*** get")
return super(ProfileReductionUpdate, self).get(request, *args, **kwargs)
def get_context_data(self, **kwargs):
print("*** get_context_data")
context = super(ProfileReductionUpdate, self).get_context_data(**kwargs)
from pprint import pprint
# pprint(context)
import copy
form = context['form']
print("Form:")
pprint(form)
choices = form.fields['ipts'].choices
choices = choices.extend( [('IPTS-123', 'IPTS-454545'),] )
pprint(form.fields['ipts'].choices)
# form.fields['ipts'].choices = choices
context['form'] = form
pprint(context['form'].fields['ipts'].choices)
return context
def render_to_response(self, context, **response_kwargs):
print("*** render_to_response")
from pprint import pprint
pprint(context)
pprint(response_kwargs)
form = context['form']
print("Form:")
pprint(form)
print("Form ipts choices:")
pprint(form.fields['ipts'].choices)
pprint(form.fields['ipts']._choices)
# pprint(dir(form.fields['ipts']))
return super(ProfileReductionUpdate, self).render_to_response(context, **response_kwargs)
这里输出:
*** get
[22/Nov/2017 10:22:14] DEBUG [server.apps.users.models:60] QuerySet
*** get_context_data
Form:
<UserProfileReductionForm bound=False, valid=Unknown, fields=(ipts;experiment)>
[('', '--------------------'), ('IPTS-123', 'IPTS-454545')]
[('', '--------------------'), ('IPTS-123', 'IPTS-454545')]
*** render_to_response
{'form': <UserProfileReductionForm bound=False, valid=Unknown, fields=(ipts;experiment)>,
'object': <UserProfile: rhf>,
'userprofile': <UserProfile: rhf>,
'view': <server.apps.users.views.ProfileReductionUpdate object at 0x7f0d29d14b70>}
{}
Form:
<UserProfileReductionForm bound=False, valid=Unknown, fields=(ipts;experiment)>
Form ipts choices:
[('', '--------------------'), ('IPTS-123', 'IPTS-454545')]
[('', '--------------------'), ('IPTS-123', 'IPTS-454545')]
编辑2:
形式:
class UserProfileReductionForm(forms.ModelForm):
'''
'''
def __init__(self, *args, **kwargs):
super(UserProfileReductionForm, self).__init__(*args, **kwargs)
self.helper = FormHelper(self)
self.helper.form_class = 'form-horizontal'
self.helper.layout.append(Submit('submit', 'Save'))
self.helper.layout.append(Button('cancel', 'Cancel',
css_class='btn-default',
onclick="window.history.back()"))
class Meta:
model = UserProfile
# exclude = ['user']
fields = ['ipts', 'experiment']
型号:
ipts = models.CharField(
"Integrated Proposal Tracking System (IPTS)",
max_length=20,
blank=True,
choices=(('', '-'*20),)
答案 0 :(得分:0)
OK!我想通了!
填充的字段是:
form.fields['ipts'].widget.choices
而不是:
form.fields['ipts'].choices
希望它能帮助别人!