Django validating form data

You would probably want to style this better, or even echo it out in the same page as the form.But for the sake of our tutorial, I want to make it short and concise.The key to the code above is the check for an Ajax request. This is when it’s an Ajax request and we simply echo our error array in JSON format.We will need this to format our inline messages later.

Although the form is always empty from a user data perspective, the form can contain data from as part of its initialization sequence (e.g. To perform this kind of Django form initialization you have three options. Textarea) def __init__(self, *args, **kwargs): # Get 'initial' argument if any initial_arguments = kwargs.get('initial', None) updated_initial = if initial_arguments: # We have initial arguments, fetch 'user' placeholder variable if any user = initial_arguments.get('user', None) # Now update the form's initial values if user if user: updated_initial['name'] = getattr(user, 'first_name', None) updated_initial['email'] = getattr(user, 'email', None) # You can also initialize form fields with hardcoded values # or perform complex DB logic here to then perform initialization updated_initial['comment'] = 'Please provide a comment' # Finally update the kwargs initial reference kwargs.update(initial=updated_initial) super(Contact Form, self).__init__(*args, **kwargs) def contact(request): .... else: # GET, generate blank form form = Contact Form(initial=) # Form is now initialized via the form's __init__ method # Reference form instance (bound/unbound) is sent to template for rendering return render(request,'about/contact.html',) , so what's happening ?Client-side on the other hand, is when Javascript analyses the fields before actually submitting the data to the server.Update 4/2/2016: – The code below is not meant to be a “copy and paste” type of thing.Of course, if there’s no errors – the form does a hard .submit() – to the same processing page and handled accordingly.Of course, we have add our styling so our field will look like our screenshots above. Again, the styles are real basic and you probably want to do better in your own forms. We’ve combined best of both worlds: server side and client side validation in one solution (thanks to Ajax). If a field validation rule has to change – we only need to change it in one place: the server code.

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