Ok, so I set up the FormWizard, but it has some strange side effects. I
implemented the process in three steps:
1. Choose a workflow
2. Specify information for the new Job (Adress, deadline, customer...)
3. Review deadlines and assigness for the different steps.
Problems occur in the third step:
- for some reason additional, unrelated tasks from the db are shown
- even though values for the mandatory fields in the form are chosen,
an error is thrown that these are missing
- if I specify a non-mandatory field (assignee) suddenly the error above
does not occur anymore an the process finishes without error (but not
necessarily the right result)
I am thinking that FormWizard cannot handle the 'dynamic' changes I am
doing: The third step is adjusted based on the chosen workflow in the first
step. I read somewhere that this is can be an issue.
Maybe one of you can tell me where the mistake is? Any hint is appreciated.
My FormWizard:
class JobWizard(SessionWizardView):
form_list = [
('first', forms.WorkflowSelectForm),
('second', forms.JobForm),
('third', forms.TaskFormSet)
]
def done(self, form_list, **kwargs):
# store Job in database
# how do I access data in ValuesView?
forms = []
for form in form_list:
forms.append(form)
job = forms[1].save()
for form in forms[2]:
current_task = form.save(commit=False)
current_task.job = job
current_task.save()
return HttpResponseRedirect('/jobs/')
def get_form_initial(self, step):
if step is None:
step = self.steps.current
if step == 'second':
prev_data = self.storage.get_step_data('first')
return {'deadline': (timezone.now() + timezone.timedelta(days=30
)).replace(hour=12, minute=0, second=0),
'workflow': Workflow.objects.get(pk = prev_data.get(
'first-workflow')),
'creator': self.request.user
}
if step == 'third':
first_step_data = self.get_cleaned_data_for_step('first')
second_step_data = self.get_cleaned_data_for_step('second')
steps = Step.objects.filter(workflow=first_step_data['workflow'
]).order_by('order')
# get total time
t_total = 0.
for step in steps:
t_total += step.time_fraction
deadline = second_step_data['deadline']
start_date = second_step_data['start_date']
job_duration = (deadline - start_date).total_seconds()
initial_data = []
task_deadline = start_date
for step in steps:
fraction = step.time_fraction / t_total
task_duration = fraction * job_duration
task_deadline = task_deadline + timezone.timedelta(seconds =
task_duration)
assignee = step.assigned_to
data = {'deadline': task_deadline,
'assigned_to': assignee,
'step': step}
initial_data.append(data)
return initial_data
return self.initial_dict.get(step, {})
def get_form(self, step=None, data=None, files=None):
form = super(JobWizard, self).get_form(step, data, files)
if step is None:
step = self.steps.current
if step == 'third':
first_step_data = self.get_cleaned_data_for_step('first')
steps = Step.objects.filter(workflow=first_step_data['workflow'
]).order_by('order')
form.extra = len(steps)
return form
The forms:
class JobForm(forms.ModelForm):
start_date = forms.DateTimeField(widget=forms.DateTimeInput, initial=
timezone.now())
workflow = forms.ModelChoiceField(queryset=Workflow.objects.all(),widget
=forms.TextInput(attrs={'readonly':'readonly'}))
creator = forms.ModelChoiceField(queryset=User.objects.all(),widget=
forms.TextInput(attrs={'readonly':'readonly'}))
class Meta:
model = Job
exclude = ('creation_date', 'paused', 'paused_until', 'completed')
class TaskForm(forms.ModelForm):
class Meta:
model = Task
exclude = ('job', 'finished', )
TaskFormSet = modelformset_factory(Task, form=TaskForm )
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