因此,我已将UpdateView设置为向表单发送request
对象,以便可以修改表单中的查询集(基于request.user
)
我的views.py:
class DataSourceUpdateView(UpdateView):
model = DataSource
form_class = DataSourceForm
template_name = 'engine/datasource_update.html'
def get(self, request, *args, **kwargs):
obj = DataSource.objects.get(pk=kwargs['pk'])
self.object = None
form = DataSourceForm(request)
return self.render_to_response(
self.get_context_data(form=form,
object=obj))
def post(self, request, *args, **kwargs):
form = DataSourceForm(request, request.POST, request.FILES)
if form.is_valid:
return self.form_valid(form)
else:
return self.form_invalid(form)
我的表格.py:
class DataSourceForm(forms.ModelForm):
def __init__(self, request, *args, **kwargs):
self.request = request
super(DataSourceForm, self).__init__(*args, **kwargs)
self.fields['dataset_request'].queryset = DatasetRequest.objects.filter(
creator=self.request.user)
class Meta:
model = DataSource
exclude = ('creator', 'vote_score', 'num_vote_up',
'num_vote_down', 'file_size', 'slug')
我的问题是,在模板中,表单未填充现有值。我该如何解决?
答案 0 :(得分:1)
使用thread_instance = None
有点棘手。因此,为了初始化表单的数据,您需要在视图本身而不是表单中进行操作。
因此,在使用UpdateView
时,您可以执行以下操作:
UpdateView
您的表格将是:
class DataSourceUpdateView(UpdateView):
model = DataSource
form_class = DataSourceForm
template_name = 'engine/datasource_update.html'
# An empty dict or add an initial data to your form
initial = {}
# And don't forget your success URL
# or use reverse_lazy by URL's name
# Or better, override get_success_url() method
# And return your success URL using reverse_lazy
sucess_url = '/'
def get_initial(self):
"""initialize your's form values here"""
base_initial = super().get_initial()
# So here you're initiazing you're form's data
base_initial['dataset_request'] = DatasetRequest.objects.filter(
creator=self.request.user
)
return base_initial
#... The rest of your view logic
奖金:
为了理解为什么需要初始化表单的数据,需要查看`UpdateView的MRO,它们为Visit this documentation link:
class DataSourceForm(forms.ModelForm):
class Meta:
model = DataSource
exclude = (
'creator',
'vote_score',
'num_vote_up',
'num_vote_down',
'file_size',
'slug'
)
具有以下属性和方法visit the documentation link:
我也建议您查看FormMixin
具有相似的属性和方法,以了解如何覆盖它们或让Django为您做魔术:D。看到这个documentation link