Dynamically set default form values in django

I'm trying to find a way to dynamically set default form values. So for example, if I add a facebook login feature on my webpage, and I can get his first name and last name from what the facebook javascript returns, I want to be able to set these values as the new "value" parameter in the given form. (basically so I'm able to put the user in my database) I was hoping that there is some sort of

{{ form.firstname.default = Javascript.return.firstname }}

that I can insert into a template but there isn't... Any ideas? Thank you.

Edit;; Maybe it would be better to first pass in the information into a views.py? But how would I do this? I am just considering hand writing the inputs out in the javascript field, which would be ann开发者_如何学Coying...

You can set the default value of a template variable:

{{ form.firstname|default:Javascript.return.firstname }}

assuming that {{ Javascript.return.firstname }} is valid in that template context.

The code generated by Django is all server-side, its templates can't use anything which isn't available when the page is loaded. You need to use javascript to set the value.

For example, if your form looks like this:

<form id="login">
 <input name="firstname" />
</form>

You could use this javascript (assuming you're using jQuery):

// Do the facebook login, set the var fname to the first name, then:
$('#login [name=firstname]').val(fname);