As mentioned in my last entry on ModelForms, i was playing around with ModelForms in Django. I found something interesting in using both the get and post method.

I have 2 pages – one for forms. the other is to confirm values / pay. However, based on the last entry, I didnt really want to save the values in the form after i click submit.

to retract how the form looks like, here is it below:

def sample(request):
if request.method == “POST”:
form = SampleForm(request.POST)
if form.is_valid():
new_Sample = form.save(commit=False)
new_Sample.label = ‘Sample01′
new_Sample.save()
return HttpResponseRedirect(’/contact/thanks/’)
else:
print “no sell request”
form = SampleForm()
return render_to_response(’Sample.htm’, {’form’: form})

So, in order to change it to 2 pages. i changed the form page so it goes to the next page.

<form action=”sample2” method=”GET”>
<dl>
<dt><label for=”id_user”>user:</label>{% if user.errors %} <span class=”error”>{{ user.errors|join:”, ” }}</span>{% endif %}</dt>
<dd><input type=”text” name=”user” value=”{{ user }}” size=”6″></dd>
<dt><label for=”id_number”>number:</label>{% if number.errors %} <span class=”error”>{{ number.errors|join:”, ” }}</span>{% endif %}</dt>
<dd>  <input type=”text” name=”number” value=”{{ number  }}” size=”6″></dd>
<dt><input type=”submit” value=”Submit” /></dt>

and the views is a simple printing of form

def sample(request):
print “no sell request”
form = SampleForm()
return render_to_response(’Sample.htm’, {’form’: form})

Thus, when click on the button submit: it goes to the next page where all the values in the form is sent there. the url should show something like localhost:8000/sample2/?user=weiyang&number=10

and then for sample 2

def sample2(request):
if request.method == “POST”:
form = SampleForm(request.POST)
if form.is_valid():
new_Sample = form.save(commit=False)
new_Sample.label = ‘Sample01′
new_Sample.save()
return HttpResponseRedirect(’/contact/thanks/’)
else:
print “no sell request”
form = SampleForm()
return render_to_response(’Sample2.htm’, {’form’: form})

and my sample2.htm is shown as

<form action=”.” method=”POST”>

<input type=”hidden” size=”10″ name=”user” value=”{{ user }}”  />
<input type=”hidden” size=”10″ name=”number” value=”{{ number }}”  />
…..posting of values to be seen….

</form>

hope this helps.

I was supposed to create a form for entry into the database and I found a simple ModelForms way as listed in the Django documents.

I made use of 4 files – forms.py, models.py, views.py and the html

1. Starting off with models.py and database is assume to be validated and syncdb is used to create the db.

from django.db import models
from django.contrib.auth.models import User

Class Sample (models.Model):

user = models.ForeignKey(User)

number  = models.FloatField()

label = models.CharField(max_length=30)

2. Once Db is setup properly, forms.py is setup

from django import newforms as forms

from models import Sample
from django.forms import ModelForm

Class SampleForm(ModelForm):

class Meta:
model = Sample
fields = (‘number’, ‘user’ )

Thus, in here, the forms will make use of the models.py and those fields indicated will be popluted in the Form

3. Next, We setup the views.py

def sample(request):
if request.method == “POST”:
form = SampleForm(request.POST)
if form.is_valid():
new_Sample = form.save(commit=False)
new_Sample.label = ‘Sample01′
new_Sample.save()
return HttpResponseRedirect(‘/contact/thanks/’)
else:
print “no sell request”
form = SampleForm()
return render_to_response(‘Sample.htm’, {‘form’: form})

Urls.py is assumed to setup properly.

4. and lastly, the sample.htm is done

<form action=”.” method=”POST”>
<dl>
<dt><label for=”id_user”>user:</label>{% if user.errors %} <span class=”error”>{{ user.errors|join:”, ” }}</span>{% endif %}</dt>
<dd><input type=”text” name=”user” value=”{{ user }}” size=”6″></dd>
<dt><label for=”id_number”>number:</label>{% if number.errors %} <span class=”error”>{{ number.errors|join:”, ” }}</span>{% endif %}</dt>
<dd>  <input type=”text” name=”number” value=”{{ number  }}” size=”6″></dd>
<dt><input type=”submit” value=”Submit” /></dt>

and done.. thats all you need to do to create a form in Django using database and some manipulation.