將自定義窗體值傳遞給視圖

Question

我試圖從我的自定義窗體傳遞值給我的views.py。不過，我似乎無法爲我的多選選項中的每一個選項傳遞一個值。渲染時，multichoiceselect中只有1個charfield，但有多個選項。有任何想法嗎？這裏的formset會有幫助嗎？不知道我會如何實施它，但任何建議表示讚賞。我是django的新手，所以解釋也會對我有所幫助！

models.py

class StateOption(models.Model): 
    partstate = models.ForeignKey(State) 
    partoption = models.ForeignKey(Option) 
    relevantoutcome = models.ManyToManyField(Outcome, through='StateOptionOutcome') 

class StateOptionOutcome(models.Model): 
    stateoption = models.ForeignKey(StateOption) 
    relevantoutcome = models.ForeignKey(Outcome) 
    outcomevalue = models.CharField(max_length=20) 

forms.py

class UpdateStateOptionWithOutcomesForm(forms.ModelForm): 
    class Meta: 
     model = StateOption 
     exclude = ['partstate', 'partoption'] 

    def __init__(self, *args, **kwargs): 
     super(UpdateStateOptionWithOutcomesForm, self).__init__(*args, **kwargs) 
     self.fields['relevantoutcome']=forms.ModelMultipleChoiceField(queryset=Outcome.objects.all(),required=True, widget=forms.CheckboxSelectMultiple) 
     self.fields['outcomevalue']=forms.CharField(widget=forms.TextInput(attrs={'size':'30'}) #when rendering there is only 1 charfield. There should be the same amount of charfields as there are multiplechoicefields. 

views.py

stateoption = get_object_or_404(StateOption, pk=stateoption_id) 

if request.method == "POST": 
    form = UpdateStateOptionWithOutcomesForm(request.POST, instance=stateoption) 
    if form.is_valid(): 

     cd = form.cleaned_data 
     outcomevalue = cd['outcomevalue']  

     for outcome_id in request.POST.getlist('relevantoutcome'): 
      stateoption_outcome = StateOptionOutcome.objects.create(stateoption=stateoption, relevantoutcome_id=int(outcome_id), outcomevalue=outcomevalue) 

template.html

{% for field in form %} 
    {{ field.label }}: 
    {{ field }} 
    {% if field.errors %} 
     {{ field.errors|striptags }} 
    {% endif %} 
{% endfor %} 

更新

我現在可以渲染等量的charfields作爲選擇。但是我無法在views.py中保存我的值，因爲outcomevalue現在包含多個值。有關如何處理它的任何想法？

if form.is_valid(): 

     cd = form.cleaned_data 
     outcomevalue = cd['outcomevalue_1'] #only handles a specific outcomevalue   

     for outcome_id in request.POST.getlist('relevantoutcome'): 
      stateoption_outcome = StateOptionOutcome.objects.create(stateoption=stateoption, relevantoutcome_id=int(outcome_id), outcomevalue=outcomevalue) 

Answer 1

您需要編寫一個循環來生成所需數量的字段。例如：

outcome_qs = Outcome.objects.all() 
self.fields['relevantoutcome'] = forms.ModelMultipleChoiceField(queryset=outcome_qs, required=True, widget=forms.CheckboxSelectMultiple) 
for outcome in outcome_qs: 
    # Use Outcome primary key to easily match two fields in your view. 
    self.fields['outcomevalue_%s' % outcome.pk] = forms.CharField(widget=forms.TextInput(attrs={'size':'30'})