Django: two forms in one view

Question

How would I write a view with a single form to add a new person, and on that same form, be able to add 0 or 1 or 2 or ... 68757857 images of that same person?

Please refer to the code below.

In models.py:

class Person(models.Model):
    name = models.CharField(max_length=50)

class Image(models.Model):
    person =  models.ForeignKey(Person)
    image = models.ImageField(upload_to='images/')

In forms.py:

class PersonForm(forms.ModelForm):
    class Meta:
        model = Product
        fields = ['name']

class ImageForm(forms.ModelForm):
    class Meta:
        model = Image
        fields = ['person', 'image']

From what I have seen, formsets are used. I have looked at many examples on SO, read the documentation and I am still confused.

I would appreciate it if someone can provide an example of a views.py that fulfils the specification at the beginning of this question.

neverwalkaloner · Accepted Answer · 2016-12-20 01:25:22Z

1

You could use Inline formsets.

In view.py firt of all you have to create a new person instance and then use this instance with formset:

from django.forms import inlineformset_factory
ImageFormSet = inlineformset_factory(Person, Image, fields=('image',))

def my_view(request):
    form = PersonForm(request.POST or None)
    if form.is_valid():
        new_person = form.save()
        formset = ImageFormSet(request.POST or None, request.FILES or None, instance=new_person)
        if formset.is_valid():
            formset.save()
            return redirect('persons:main')
    else:
        formset = ImageFormSet(request.POST or None, request.FILES or None)
    return render(request, 'my_template.html', {'formset': formset, 'form': form})

In my_template.html:

<form action="" method="post" enctype="multipart/form-data">
        {{ form.as_p }}
        {{ formset.management_form }}
        {% for frm in formset %}
            {{ frm.as_p }}
        {% endfor %}   
        <input type="submit" value="Create">
</form>

edited Dec 20, 2016 at 1:25

answered Dec 19, 2016 at 6:16

neverwalkaloner

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4 Comments

Flux Over a year ago

In your code, if the PersonForm is not valid, the view will not return a HttpResponse object. It will return None instead. How do I deal with this case?

neverwalkaloner Over a year ago

@Flux oops, sorry it just mistake with indent. Check updated answer.

Flux Over a year ago

But then, if form.is_valid() returns false, the variable formset may not be defined when you try to render the template.

neverwalkaloner Over a year ago

@Flux to avoid this you could just add else block.

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