Why I cannot see a error message from ValidationError Django? - django

Question

I have done what is written on Django Documentation and I have tried several Youtube tutorials, including Stackoverflow's advice. However, I could not make the message "Validation Error" appear on the template. When I click the button to create a post with bad_word, I redirect to the same page, the post isn't saved but the form doesn't show me the message. I tried to save in a print( form.errors ) in the view and the terminal showed the message that I want to see in the template. So I don't know what I'm doing wrong...
view.py
if request.method == "POST":
form = PostForm(request.POST)
if form.is_valid():
title = form.cleaned_data['title']
content = form.cleaned_data['content']
username = User.objects.get(username=f"{request.user}")
new_post = Post(user=username, title=title, content=content, datetime=timezone.now())
new_post.writeOnChain()
cache.expire("cache", timeout=0)
return HttpResponseRedirect("/")
else:
form = PostForm()
return render(request, "api/homepage.html", {'form': form, 'postList': postList})
forms.py
class PostForm(forms.ModelForm):
class Meta:
model = Post
fields = ('title', 'content',)
def clean_title(self):
title = self.cleaned_data['title']
if "bad_word" in title:
raise forms.ValidationError("Error")
return title
def clean_content(self):
content = self.cleaned_data['content']
if "bad_word" in content:
raise forms.ValidationError("Error")
return content
template
<div class="p-3 forms m-3">
<form class="crispy" action="{% url 'homepage' %}" method="post">
{% csrf_token %}
{{ form|crispy }}
<input type="submit" class="btn buttons" value="Create Post">
</form>
</div>
terminal print
<ul class="errorlist"><li>content<ul> class="errorlist"><li>Error</li></ul> </li></ul>

Answer 1

If your form is invalid you always redirect to "/" without form information. Your return redirect needs to be indented with the rest of the "valid" form code.
if request.method == "POST":
form = PostForm(request.POST)
if form.is_valid():
title = form.cleaned_data['title']
content = form.cleaned_data['content']
username = User.objects.get(username=f"{request.user}")
new_post = Post(user=username, title=title, content=content, datetime=timezone.now())
new_post.writeOnChain()
cache.expire("cache", timeout=0)
return HttpResponseRedirect("/") # this line here
else: