Django爲參數'（7，）'和關鍵字參數'{}'形成反向'

Question

我在過去一天遇到了這個錯誤，似乎無法解決它。

Reverse for '' with arguments '(7,)' and keyword arguments '{}' not found. 

我的目標是讓用戶從我的drui_index頁面中選擇一種疾病。然後用戶被帶到drui頁面添加或編輯指標。在我的模型中，每種疾病都有多個指標。當我到達drui頁面時，出現上述錯誤，我不知道爲什麼。錯誤中的'7'是疾病表中的PK。

Views.py

def drui_index(request): 
    disease_list = Disease.objects.all() 
    context = {'disease_list':disease_list} 
    return render(request, 'drui_index.html', context) 


def drui(request, disease_id): 
    disease = get_object_or_404(Disease, pk=disease_id) 

    if request.method == "POST": 

     diseaseForm = DiseaseForm(request.POST, instance=disease) 
     indicatorInlineFormSet = IndicatorFormSet(request.POST, request.FILES, instance=disease) 

     if diseaseForm.is_valid(): 
     new_disease = diseaseForm.save(commit=False) 
     indicatorInlineFormSet.save() 
     return HttpResponseRedirect(reverse('drui', kwargs={'disease_id':disease_id})) 

    else: 
     diseaseForm = DiseaseForm(instance=disease) 
     indicatorInlineFormSet = IndicatorFormSet(instance=disease) 

    return render(request, 'drui.html', {'disease':disease, 'diseaseForm':diseaseForm, 'indicatorInlineFormSet': indicatorInlineFormSet}) 

HTML drui.html

<form class="disease_form" action="{% url drui disease.id %}" method="post">{% csrf_token %} 
    {{ disease }} 
    {{ diseaseForm.as_table }} 
    {{ indicatorInlineFormSet.as_table }} 

urls.py

url(r'^drui_index/$', 'Physician_UI.views.drui_index', name='drui_index'), 
url(r'^drui_index/(?P<disease_id>\d+)/$', 'Physician_UI.views.drui', name='drui'), 

forms.py

class DiseaseForm(forms.ModelForm): 
    disease = forms.ModelChoiceField(queryset=Disease.objects.all()) 

    class Meta: 
     model = Disease 

IndicatorFormSet = inlineformset_factory(Disease, 
    Indicator, 
    can_delete=False, 
    extra=MAX_INDICATORS) 

在我的views.py，我不認爲我需要調用diseaseForm，因爲我已經在drui_index選擇的一種疾病。但是，我不認爲這是造成問題的原因。

Answer 1

我認爲你缺少周圍URL名稱報價：（如果你正在使用Django> = 1.5），或在模板中使用{% load url from future %}

{% url drui disease.id %} 

應該是：

{% url "drui" disease.id %} 

Answer 2

你url標記應是{% url "drui" disease_id=disease.id %}，因爲你需要傳入關鍵字參數。

查看documentation瞭解更多信息。

正如你永遠不保存新條目，我覺得你只是使用的形式來顯示ModelChoiceField，在這種情況下，你並不需要一個ModelForm：

class DiseaseForm(forms.Form): 
    disease = forms.ModelChoiceField(queryset=Disease.objects.all()) 

這樣，你避免了commit=False部分。

你應該總是有你的if form.is_valid()的else：

from django.shortcuts import redirect 

def drui(request, disease_id): 
    disease = get_object_or_404(Disease, pk=disease_id) 
    ctx = {} 
    ctx['disease'] = disease 
    ctx['indicatorInlineFormSet'] = IndicatorFormSet() 
    ctx['diseaseForm'] = DiseaseForm() 

    if request.method == "POST": 

     diseaseForm = DiseaseForm(request.POST) 
     indicatorInlineFormSet = IndicatorFormSet(request.POST, request.FILES) 

     if diseaseForm.is_valid(): 
     return redirect('drui', disease_id=disease_id) 
     else: 
     # Form wasn't valid, return the same view to display the errors 
     ctx['diseaseForm'] = diseaseForm 
     ctx['indicatorInlineFormset'] = indicatorInlineFormset 
     return render(request, 'drui.html', ctx) 

    else: 

     return render(request, 'drui.html', ctx)