How to pass a message from HttpResponseRedirect in Django?

Question

I have a view which does the certain task and return to another view which render hello.html template.

def 1stview(request):    #Do this    #Do that    return HttpResponseRedirect('/success/')  def success(request):     return render_to_response('overview.html', {'overview_files': b, 'total_files':total_files, 'total_size':total_size, 'username': username}, context_instance=RequestContext(request)) 

After successfully completing 1st view I want to pass 'Successful' message in overview.html. There are lots of redirect to success view. I want to transfer message only when going through 1st view. How can I do that?

Answer 1

Adding a more elaborative answer.

1: Configure a message storage in your settings.py:

MESSAGE_STORAGE = 'django.contrib.messages.storage.session.SessionStorage' 

or if you are not using sessions, use CookieStorage:

MESSAGE_STORAGE = 'django.contrib.messages.storage.session.CookieStorage' 

2: In your view, import django.contrib.messages:

from django.contrib import messages 

3: Set the message data before returning the HttpResonse:

messages.success(request, 'Changes successfully saved.') 

which is a shorthand for:

messages.add_message(request, messages.SUCCESS, 'Changes successfully saved.') 

The message tags (messages.SUCCESS in this case) can then be used in your template to i.e. add a corresponding CSS-class or hide debug-messages. Django includes a few by default but if you wish to use this with Bootstrap's default alert classes you will need to add some custom message tags for the missing ones.

4: In your template you can then use the messages like this if you are using Bootstrap alerts:

{% if messages %}     {% for message in messages %}         <div class="alert {% if message.tags %}alert-{{ message.tags }}{% endif %}" role="alert">{{ message }}</div>     {% endfor %} {% endif %} 

For example, Django uses 'error' as the default tag for ERROR while Bootstrap uses danger to indicate errors. The best solution is to use custom tags, but you can also monkeypatch it in your template (ugly solution):

{% if messages %}     {% for message in messages %}             <div class="alert {% if message.tags %}alert-{% if message.level == DEFAULT_MESSAGE_LEVELS.ERROR %}danger{% else %}{{ message.tags }}{% endif %}{% endif %}" role="alert">{{ message }}</div>     {% endfor %} {% endif %}