我正在使用diplay_by_question模板编辑问卷调查应用程序，其中每个问题使用调查形式的不同URL / 22显示在单个页面上; suvey / 22-1;调查/ 22-2 ....
保存答案时，表格应采取我们所处的实际步骤并将其保存在数据库中。
例如，如果我在URL调查/ 22-2引用调查ID：22和步骤：1
在我的代码中，它使用当前步骤从我的表单中提取数据：
form = ResponseForm(request.POST, survey=survey, user=request.user, step=kwargs.get('step', 0))
但是我不明白为什么如果URL是步骤1，则步骤不会更新并保持在步骤0 能否请你帮忙 ？
viexs.py：
class SurveyDetail(View):
def get(self, request, *args, **kwargs):
survey = get_object_or_404(Survey, is_published=True, id=kwargs['id'])
if survey.template is not None and len(survey.template) > 4:
template_name = survey.template
else:
if survey.display_by_question:
template_name = 'survey/survey.html'
else:
template_name = 'survey/one_page_survey.html'
if survey.need_logged_user and not request.user.is_authenticated():
return redirect('%s?next=%s' % (settings.LOGIN_URL, request.path))
categories = Category.objects.filter(survey=survey).order_by('order')
form = ResponseForm(survey=survey, user=request.user,
step=kwargs.get('step', 0))
context = {
'response_form': form,
'survey': survey,
'categories': categories,
}
return render(request, template_name, context)
def post(self, request, *args, **kwargs):
import pdb; pdb.set_trace()
survey = get_object_or_404(Survey, is_published=True, id=kwargs['id'])
if survey.need_logged_user and not request.user.is_authenticated():
return redirect('%s?next=%s' % (settings.LOGIN_URL, request.path))
form = ResponseForm(request.POST, survey=survey, user=request.user, step=kwargs.get('step', 0))
context = {'response_form': form, 'survey': survey,}
if form.is_valid():
session_key = 'survey_%s' % (kwargs['id'],)
if session_key not in request.session:
request.session[session_key] = {}
for key, value in form.cleaned_data.items():
request.session[session_key][key] = value
request.session.modified = True
next_url = form.next_step_url()
response = None
if survey.display_by_question:
save_form = form
if save_form.is_valid():
response = save_form.save()
else:
response = form.save()
if next_url is not None:
return redirect(next_url)
else:
del request.session[session_key]
if response is None:
return redirect('/')
else:
next_ = request.session.get('next', None)
if next_ is not None:
if 'next' in request.session:
del request.session['next']
return redirect(next_)
else:
return redirect('survey-confirmation',
uuid=response.interview_uuid)
if survey.template is not None and len(survey.template) > 4:
template_name = survey.template
else:
if survey.display_by_question:
template_name = 'survey/survey.html'
else:
template_name = 'survey/one_page_survey.html'
return render(request, template_name, context)
form.py:
class ResponseForm(models.ModelForm):
WIDGETS = {
Question.TEXT: forms.Textarea,
Question.SHORT_TEXT: forms.TextInput,
Question.RADIO: forms.RadioSelect,
Question.SELECT: forms.Select,
Question.SELECT_IMAGE: ImageSelectWidget,
Question.SELECT_MULTIPLE: forms.CheckboxSelectMultiple,
}
class Meta(object):
model = Response
fields = ()
def __init__(self, *args, **kwargs):
import pdb; pdb.set_trace()
""" Expects a survey object to be passed in initially """
self.survey = kwargs.pop('survey')
self.user = kwargs.pop('user')
try:
self.step = int(kwargs.pop('step'))
except KeyError:
self.step = None
super(ResponseForm, self).__init__(*args, **kwargs)
self.uuid = uuid.uuid4().hex
self.steps_count = len(self.survey.questions.all())
# add a field for each survey question, corresponding to the question
# type as appropriate.
data = kwargs.get('data')
for i, question in enumerate(self.survey.questions.all()):
is_current_step = i != self.step and self.step is not None
if self.survey.display_by_question and is_current_step:
continue
else:
self.add_question(question, data)
def _get_preexisting_response(self):
""" Recover a pre-existing response in database.
The user must be logged.
:rtype: Response or None"""
if not self.user.is_authenticated():
return None
try:
return Response.objects.get(user=self.user, survey=self.survey)
except Response.DoesNotExist:
LOGGER.debug("No saved response for '%s' for user %s",
self.survey, self.user)
return None
def _get_preexisting_answer(self, question):
""" Recover a pre-existing answer in database.
The user must be logged. A Response containing the Answer must exists.
:param Question question: The question we want to recover in the
response.
:rtype: Answer or None"""
response = self._get_preexisting_response()
if response is None:
return None
try:
return Answer.objects.get(question=question, response=response)
except Answer.DoesNotExist:
return None
def get_question_initial(self, question, data):
""" Get the initial value that we should use in the Form
:param Question question: The question
:param dict data: Value from a POST request.
:rtype: String or None """
initial = None
answer = self._get_preexisting_answer(question)
if answer:
# Initialize the field with values from the database if any
if question.type == Question.SELECT_MULTIPLE:
initial = []
if answer.body == "[]":
pass
elif "[" in answer.body and "]" in answer.body:
initial = []
unformated_choices = answer.body[1:-1].strip()
for unformated_choice in unformated_choices.split(","):
choice = unformated_choice.split("'")[1]
initial.append(slugify(choice))
else:
# Only one element
initial.append(slugify(answer.body))
else:
initial = answer.body
if data:
# Initialize the field field from a POST request, if any.
# Replace values from the database
initial = data.get('question_%d' % question.pk)
return initial
def get_question_widget(self, question):
""" Return the widget we should use for a question.
:param Question question: The question
:rtype: django.forms.widget or None """
try:
return self.WIDGETS[question.type]
except KeyError:
return None
def get_question_choices(self, question):
""" Return the choices we should use for a question.
:param Question question: The question
:rtype: List of String or None """
qchoices = None
if question.type not in [Question.TEXT, Question.SHORT_TEXT,
Question.INTEGER]:
qchoices = question.get_choices()
# add an empty option at the top so that the user has to explicitly
# select one of the options
if question.type in [Question.SELECT, Question.SELECT_IMAGE]:
qchoices = tuple([('', '-------------')]) + qchoices
return qchoices
def get_question_field(self, question, **kwargs):
""" Return the field we should use in our form.
:param Question question: The question
:param **kwargs: A dict of parameter properly initialized in
add_question.
:rtype: django.forms.fields """
FIELDS = {
Question.TEXT: forms.CharField,
Question.SHORT_TEXT: forms.CharField,
Question.SELECT_MULTIPLE: forms.MultipleChoiceField,
Question.INTEGER: forms.IntegerField
}
# logging.debug("Args passed to field %s", kwargs)
try:
return FIELDS[question.type](**kwargs)
except KeyError:
return forms.ChoiceField(**kwargs)
def add_question(self, question, data):
""" Add a question to the form.
:param Question question: The question to add.
:param dict data: The pre-existing values from a post request. """
kwargs = {"label": question.text,
"required": question.required, }
initial = self.get_question_initial(question, data)
if initial:
kwargs["initial"] = initial
choices = self.get_question_choices(question)
if choices:
kwargs["choices"] = choices
widget = self.get_question_widget(question)
if widget:
kwargs["widget"] = widget
field = self.get_question_field(question, **kwargs)
if question.category:
field.widget.attrs["category"] = question.category.name
else:
field.widget.attrs["category"] = ""
# logging.debug("Field for %s : %s", question, field.__dict__)
self.fields['question_%d' % question.pk] = field
def has_next_step(self):
if self.survey.display_by_question:
if self.step < self.steps_count - 1:
return True
return False
def next_step_url(self):
if self.has_next_step():
context = {'id': self.survey.id, 'step': self.step + 1}
return reverse('survey-detail-step', kwargs=context)
else:
return None
def current_step_url(self):
return reverse('survey-detail-step', kwargs={'id': self.survey.id, 'step': self.step})
def save(self, commit=True):
import pdb; pdb.set_trace()
""" Save the response object """
# Recover an existing response from the database if any
# There is only one response by logged user.
response = self._get_preexisting_response()
if response is None:
response = super(ResponseForm, self).save(commit=False)
response.survey = self.survey
response.interview_uuid = self.uuid
if self.user.is_authenticated():
response.user = self.user
response.save()
# response "raw" data as dict (for signal)
data = {
'survey_id': response.survey.id,
'interview_uuid': response.interview_uuid,
'responses': []
}
# create an answer object for each question and associate it with this
# response.
for field_name, field_value in self.cleaned_data.items():
if field_name.startswith("question_"):
# warning: this way of extracting the id is very fragile and
# entirely dependent on the way the question_id is encoded in
# the field name in the __init__ method of this form class.
q_id = int(field_name.split("_")[1])
question = Question.objects.get(pk=q_id)
answer = self._get_preexisting_answer(question)
if answer is None:
answer = Answer(question=question)
answer.body = field_value
data['responses'].append((answer.question.id, answer.body))
LOGGER.debug(
"Creating answer for question %d of type %s : %s", q_id,
answer.question.type, field_value
)
answer.response = response
answer.save()
survey_completed.send(sender=Response, instance=response, data=data)
return response