class GroupForm(ModelForm): 
class Meta: 
model = GroupsList 
fields = ['link'] 
def clean(self): 
link = self.cleaned_data.get('link') 
vk_api = get_api() 
info = get_grop_info(link, vk_api) 
if info['count']: 
if info['count'] < 0: 
raise ValidationError('В группе нет участников') 
elif info['count'] > 10000: 
raise ValidationError('Слишком нмого участников >10000') 
else: 
raise ValidationError('Проблема с получением данных') 
return self.cleaned_data

 def group_add(request, username): 
if request.POST: 
user = User.objects.get(username=username) 
form = GroupForm(request.POST) 
if form.is_valid(): 
input_group = form.save(commit=False) 
group_link = input_group.link 
group_info = get_grop_info(input_group.link, get_api()) 
try: 
group = GroupsList.objects.get(link=group_link) 
try: 
group.author.add(user.id) 
except Exception as e: 
print(e) 
insert_group_info(input_group.link, group_info) 
except: 
input_group = form.save() 
group_link = input_group.link 
group = GroupsList.objects.get(link=group_link) 
group.author.add(user.id) 
insert_group_info(input_group.link, group_info) 
else: 
return redirect('/', {'group_form': form}) 
return redirect('/', {'group_form': form})

 <form action="manage_group/group_add/{{ username }}/" method="post"> 
{{ group_form.as_p }} 
<input type="submit" value="Добавить группу"> 
{% csrf_token %} 
</form>