Django表单输入字段不显示问题求助（附相关代码）

Hey there! Let's walk through why your form input fields are missing (only the submit button shows up) and fix it step by step. I've checked your code and found a couple of key issues:

1. Post Request Doesn't Pass the Form Back to the Template #

Looking at your HomeView's post method, when handling form submission, you're returning the template with an empty context. That means after submitting the form, the template can't find the form variable to render input fields. Even if the form is invalid, you need to pass the form instance back so the template can display both fields and any validation errors.

Fixed views.py Post Method: #

class HomeView(View):
    def get(self, request, *args, **kwargs):
        the_form = SubmitUrlForm()
        context = {
            "title": "Submit Url",
            "form": the_form
        }
        return render(request, "app/home.html", context)
    
    def post(self, request, *args, **kwargs):
        form = SubmitUrlForm(request.POST)
        if form.is_valid():
            print(form.cleaned_data)
            # Optional: Add logic to save the URL to your surlShort model here
            # surlShort.objects.create(url=form.cleaned_data.get('url'))
        
        # Always pass the form (valid or invalid) back to the template
        context = {
            "title": "Submit Url",
            "form": form
        }
        return render(request, "app/home.html", context)

2. Typo in Model Manager's all() Method #

In your surlShortManager, there's a typo in the all method: you wrote return as instead of return qs. This would cause a server error (NameError) when querying your model, which might disrupt page rendering too.

Fixed models.py Manager Method: #

class surlShortManager(models.Manager):
    def all(self, *args,**kwargs):
        qs_main = super(surlShortManager,self).all(*args, **kwargs)
        qs = qs_main.filter(active = True)
        return qs  # Corrected from "return as"

3. Double-Check Your URL Configuration #

Make sure your urls.py is using the HomeView class-based view instead of the home_view_fbv function-based view. The FBV doesn't pass the form to the template at all, so if that's the active view, your form fields would never show up:

# urls.py example
from django.urls import path
from .views import HomeView

urlpatterns = [
    path('', HomeView.as_view(), name='home'),
    # Remove or comment out the fbv line if present: path('', home_view_fbv, name='home')
]

After making these changes, your form input fields should render properly on both the initial GET request and after submitting the form. If you run into validation errors, they'll also show up next to the relevant fields now!

内容的提问来源于stack exchange，提问作者stumbling_errors