Validation errors not showing up - django

Question

So I'm stuck on why validation errors aren't showing for this particular form. They are showing up fine on all my other forms, but not this one.
I can empirically see the validation at work because when office_street_address is none, the form is not saving. But the form.non_field_error doesn't seem to have any errors.
forms
class PremiumAgentForm(forms.ModelForm):
class Meta:
model = Agent
exclude = ['field1', 'field2', ...]
def __init__(self, *args, **kwargs):
super(PremiumAgentForm, self).__init__(*args, **kwargs)
for visible in self.visible_fields():
visible.field.widget.attrs['class'] = 'form-control'
def clean(self):
cd = super(PremiumAgentForm, self).clean()
a = cd.get('office_street_address')
if a == None:
raise forms.ValidationError("Error")
return cd
html
<form class="row justify-content-center" enctype="multipart/form-data" method="post">
{% csrf_token %}
{% for error in form.non_field_errors %}
<p style="color: red">{{ error }}</p>
{% endfor %}
{% if form.non_field_errors %}
<p style="color: red">there are errors</p>
{% else %}
<p>no errors</p> # This is always displayed.
{% endif %}
<div class="col-sm-4">
{% for field in form %}
<div class="form-group pb-3">
{% for error in field.errors %}
<p style="color: red">{{ error }}</p>
{% endfor %}
{{ field.label_tag }}
{{ field }}
{% if field.help_text %}
<small class="form-text text-muted">{{ field.help_text|safe }}</small>
{% endif %}
</div>
{% endfor %}
<button class="button2"><span>Submit</span></button>
</div>
</form>
views.py
def edit_profile(request):
if request.method == 'POST':
form = PremiumAgentForm(request.POST, request.FILES, instance=agent)
if form.is_valid():
form.save()
return HttpResponseRedirect(request.META['HTTP_REFERER'])
else:
agent = get_object_or_404(Agent, pk=request.user.agent.pk)
form = PremiumAgentForm(instance=agent)
return render(request, 'edit_profile.html', {'form': form})

Answer 1

In your case, you keep the form if it is valid, and after that you do a redirect, even if the form is not valid. This should help:
if not form.is_valid():
return render(request, 'edit_profile.html', {'form': form})
form.save()