I use Django for all my web projects.
I like to simplify my applications'forms by nesting them, for example when users can add many photos on a product.
This class will help you to easily create nested forms in your project. I created this for a big project, with many nested forms, and many users love it every days.
Django 1.2+ (should be compatible with 1.1, but not tested)
First of all, insert the nested_forms folder in in project's path.
from nested_forms import ComplexModelFormMake you main form inherit from ComplexModelForm
In Meta subclass of your ComplexModelForm, add :
formsets = {
}This dict has for keys the related objects' names.
For the examples form Django's tutorial, we could write :
def get_choice_form(poll):
class ChoiceForm(forms.ModelForm):
class Meta:
model = Choice
exclude = ['poll']
def save(self, commit=True):
instance = super(ChoiceForm, self).save(commit=False)
instance.poll = poll
if commit:
instance.save()
self.save_m2m()
return instance
return ChoiceForm
class PollForm(ComplexModelForm):
class Meta:
model = Poll
formsets = {
'choice_set': {
'form': lambda instance: get_choice_form(instance),
'extra': 1,
'initial': [
{
'choice': 'A sample choice',
'votes': 0,
}
],
},
}You now have a nested form. Let's start using it in your template.
Considering your nested form instance in a form variable in your context, you can access your access your form fields like any other forms. Your formsets are accessible by {{ form.formsets.[ name of related name of your object] }}. Don't forget to add the management form for each, and each formset is like any formset you would create manually. DON'T FORGET TO IMPLEMENT THE "ADD" TEMPLATE FILTER !
<form method="post">
<fieldset>
<legend>Poll</legend>
{{ form.as_div }}
{% with form.formsets.choice_set as choice_formset %}
{{ choice_formset.management_form }}
{% for choice_form in choice_formset.forms %}
<fieldset>
<legend>Choice {{ forloop.counter }}</legend>
{{ choice_form.as_div }}
</fieldset>
{% endfor %}
<button name="{{ choice_formset.prefix }}-TOTAL_FORMS" value="contact_formset.total_form_count|add:1">
Add a choice
</button>
{% endwith %}
</fieldset>
<input type="submit" value="Save poll"/>
</form>