ValueError: The view **** didn't return an HttpResponse object. It returned None instead

Question

I'm using Django forms to handle user input for some point on my Django app. but it keeps showing this error whenever the user tries to submit the form.

ValueError: The view *my view name goes here*  didn't return an HttpResponse object. It returned None instead

Here's the code:

Forms.py

class sendBreachForm(forms.Form):
    """
    Form for sending messages to users.
    """
    text = forms.CharField(max_length=100)
    image = forms.FileField()
    cords = forms.CharField(widget=forms.TextInput(
        attrs={"type":"hidden"}
    ))

views.py

@login_required
def web_app(request):
    if request.user.is_staff or request.user.is_superuser:
        return redirect('/ar/system/')
    else:
        if request.method == "POST":
            form = sendBreachForm(request.POST)
            print("AAAAAAAAa in a post request")
            if form.is_valid():
                print("AAAAAAAAa form is valid")
                text = form.cleaned_data['text']
                image = form.cleaned_data['image']
                cords = form.cleaned_data['cords']
                try:
                    new_breach = Breach.object.create(text=text,image=image)
                    add_form_cords_to_breach(request,new_breach,cords)   
                    print("AAAAAAAA added breach")
                    return render(request,"web_app.html",context)         
                except :
                    print("AAAAAAAA error ")
                    return render(request,"web_app.html",context)   
                    # raise Http404('wrong data')
                    
        else:
            form = sendBreachForm()
            context = {}
            context['form']=form
            context['all_elements'] = WaterElement.objects.all()
            current_site = Site.objects.get_current()
            the_domain = current_site.domain
            context['domain'] = the_domain
            all_layers = MapLayers.objects.all()
            context['all_layers']=all_layers
            return render(request,"web_app.html",context)

HTML

                  <form method ='post'>
                    {% csrf_token %}
                    {{form.text}}
                    <label for="text">وصف المعاينة</label>
                    {{form.image}}
                    <label for="image">صورة المعاينة</label>
                    {{form.cords}}
                      <input type="submit" value = "إرسال المعاينة">
                </form>

Answer 1

The error makes complete sense, the view should return some response in all the conditions, currently you have both if and else condition for everything, except if form.is_valid() so also maintain in that.

@login_required
def web_app(request):
    if request.user.is_staff or request.user.is_superuser:
        return redirect('/ar/system/')
    else:
        if request.method == "POST":
            form = sendBreachForm(request.POST)
            print("AAAAAAAAa in a post request")
            if form.is_valid():
                print("AAAAAAAAa form is valid")
                text = form.cleaned_data['text']
                image = form.cleaned_data['image']
                cords = form.cleaned_data['cords']
                try:
                    new_breach = Breach.object.create(text=text,image=image)
                    add_form_cords_to_breach(request,new_breach,cords)   
                    print("AAAAAAAA added breach")
                    return render(request,"web_app.html",context)         
                except:
                    print("AAAAAAAA error ")
                    return render(request,"web_app.html",context)   
                    # raise Http404('wrong data')
            else:
                print("form is not valid")
  
                messages.error(request,"form is not valid, kindly enter correct details")
                return redirect("some_error_page")
                    
        else:
            form = sendBreachForm()
            context = {}
            context['form']=form
            context['all_elements'] = WaterElement.objects.all()
            current_site = Site.objects.get_current()
            the_domain = current_site.domain
            context['domain'] = the_domain
            all_layers = MapLayers.objects.all()
            context['all_layers']=all_layers
            return render(request,"web_app.html",context)