У меня есть форма на моем веб-сайте, которая создает запись в базе данных. Поэтому каждый раз, когда я обновляю страницу, я сначала получил это сообщение:
The page that you're looking for used information that you entered.
Returning to that page might cause any action you took to be repeated.
Do you want to continue?
Очевидно, что я не хочу иметь одну и ту же информацию несколько раз в моей базе данных.
на всякий случай: это мой код (я знаю, что есть много дерьма, который нужно удалить):
#views.py
@login_required
def subject(request,username, subject_name):
subject_id = Subjects.objects.filter(user = request.user).get(name=subject_name)
#Upload form
if request.method == "POST":
if "upload-b" in request.POST:
form = ContentForm(request.POST, request.FILES, instance=subject_id)
if form.is_valid(): # need to add some clean functions
up_f = FileDescription.objects.get_or_create(subject=subject_id,
subject_name=subject_name,
file_type=request.POST['file_type'],
file_uploaded_by = username,
file_name=request.POST['file_name'],
file_description=request.POST['file_description'],
image = request.FILES['image'],
)
form = ContentForm()
#Show uploaded files with respect to clicked session (Homework, Class , Random ... )
homework_files = Homework.homework.filter(subject_name__exact=subject_name,
file_uploaded_by__exact=username)
class_files = ClassPapers.classpapers.filter(subject_name__exact=subject_name)
random_files = RandomPapers.randompapers.filter(subject_name__exact=subject_name,
file_uploaded_by__exact=username)
return render_to_response('subject_content.html', {'form':form,
'subject_name': subject_name,
'class_files': class_files,
'homework_files': homework_files,
'class_files': class_files,
'random_files': random_files,
},
context_instance=RequestContext(request))
#forms.py:
class ContentForm(forms.ModelForm):
file_name =forms.CharField(max_length=255, widget=forms.TextInput(attrs={'size':20}))
file_description = forms.CharField(widget=forms.Textarea(attrs={'rows':4, 'cols':25}))
class Meta:
model = FileDescription
exclude = ('subject', 'subject_name', 'file_uploaded_by')
#template
<div id="sbj-creation-frm">
<h3>Upload File</h3>
<form action="." method="post" enctype="multipart/form-data">{% csrf_token %}
{{ form.as_p }}
<input type="submit" value="submit" name="upload-b" class="btn-create" />
</form>
</div>