Initial populating on Django Forms

Question

I decide to learn Django Forms. For awhile now been using HTML forms because its hard for me to come terms with django forms.

How could i populate initial data to django forms? Example:

Consider if these models are populated. Contain data.

models.py

class Game(models.Model):
   title = models.CharField()
   genre = models.CharField()

so if i have

view.py

Game_list = Game.objects.all()
return render_to_response('template',locals())

so in template.html i could just:

{% for game in game_list %}
<p> game.title <p> <br /> <p> game.genre <p>

if i wanna populate an initial data on html forms which i usually use:

    {% for game in game_list %}
    <form action= '/add/' method='POST'>
    <input="text" name="title" value="{{game.title}}" />
    <input="text" name="genre" value="{{game.genre}}" />
    <input type="submit" />

How can i do this in Django Forms? By reading article online,they do this by overriding using forms.init

class Anyforms(forms.Form):
   super(Anyforms, self).__init__(*args,**kwargs)

I cant get a hold of how to populate using super. What/How data that forms get during runtime? Any good links that i could read to get me up & running on wrangling django forms?

Does:

<input="text" name="title" value="{{game.title}}" /> 
<input="text" name="genre" value="{{game.genre}}" /> 

are the same as this ?

data = {'title':'{{game.title}}','genre':'{{game.genre}}'} 
form(data) 

Are the variable gonna be replace in template?

Answer 1

http://docs.djangoproject.com/en/1.2/ref/forms/api/#ref-forms-api-bound-unbound

To bind data to a form, pass the data as a dictionary as the first parameter to your Form class constructor:

>>> data = {'subject': 'hello',
...         'message': 'Hi there',
...         'sender': '[email protected]',
...         'cc_myself': True}
>>> f = ContactForm(data)

Answer 2

S. Lott's answer tells you how to initialize the form with some data in your view. To render your form in a template, see the following section of the django docs which contain a number of examples:

• Outputting forms as HTML

Although the examples show the rendering working from a python interpreter, it's the same thing when performed in a template.

For example, instead of print f, your template would simply contain: {{ f }} assuming you pass your form through the context as f. Similarly, f.as_p() is written in the template as {{ f.as_p }}. This is described in the django template docs under the Variables section.

Update (responding to the comments)

Not exactly, the template notation is only for template. Your form and associated data are initialized in the view.

So, using your example, your view would contain something like:

def view(request):
    game = Game.objects.get(id=1) # just an example
    data = {'id': game.id, 'position': game.position}
    form = UserQueueForm(initial=data)
    return render_to_response('my_template.html', {'form': form})

Then your template would have something like:

{{ form }}

Or if you wanted to customize the HTML yourself:

{{ form.title }} <br />
{{ form.genre }} <br />

and so on.

I recommend trying it and experimenting a little. Then ask a question if you encounter a problem.

Answer 3

just change

data = {'title':'{{game.title}}','genre':'{{game.genre}}'} 
form(data) 

to

data = {'title':'{{game.title}}','genre':'{{game.genre}}'} 
form(initial=data)