I have been learning django for the last few months, and have been working on an ecommerce project to further my learning, but I’ve been absolutely stumped by an issue I’ve been having recently.

I’m using a ForeignKey to add multiple images to each product, and I currently have a form that allows me to create a post and add up to 20 images to it, I found some help online to make that form work and have studied it a lot to make sure I understand it, but when I tried to make it into an editing form I’ve gotten completely lost.

Here is my code

models.py

from django.db import models
from django.template.defaultfilters import slugify

from users.models import User


# Create your models here.

def get_thumbnail_filename(instance, filename):
    title = instance.name
    slug = slugify(title)
    return "post_images/%s-%s" % (slug, filename)  



class Product(models.Model):
    seller = models.ForeignKey(User, on_delete=models.CASCADE, null=True)
    name = models.CharField(max_length=200)
    description = models.TextField()
    created = models.DateTimeField(auto_now_add=True)
    price = models.FloatField()
    thumbnail = models.ImageField(upload_to=get_thumbnail_filename, null=True)
    
    def __str__(self):
        return self.name



def get_image_filename(instance, filename):
    title = instance.product.name
    slug = slugify(title)
    return "post_images/%s-%s" % (slug, filename)  



class Images(models.Model):
    product = models.ForeignKey(Product, default=None, on_delete=models.CASCADE, null=True)
    img = models.ImageField(upload_to=get_image_filename,
                              verbose_name='Image')
    class Meta:
        verbose_name_plural = "Images"

views.py

@login_required
def add_product(request):
 
    ImageFormSet = modelformset_factory(Images,
                                        form=ImageForm, extra=20)
    #'extra' means the number of photos that you can upload   ^
    if request.method == 'POST':
    
        postForm = ProductForm(request.POST, request.FILES)
        formset = ImageFormSet(request.POST, request.FILES,
                               queryset=Images.objects.none())
    
    
        if postForm.is_valid() and formset.is_valid():
            post_form = postForm.save(commit=False)
            post_form.user = request.user
            post_form.save()
    
            for form in formset.cleaned_data:
                #this helps to not crash if the user   
                #do not upload all the photos
                if form:
                    image = form['img']
                    photo = Images(product=post_form, img=image)
                    photo.save()
            # use django messages framework
            messages.success(request,
                             "Yeeew, check it out on the home page!")
            return HttpResponseRedirect("/")
        else:
            print(postForm.errors, formset.errors)
    else:
        postForm = ProductForm()
        formset = ImageFormSet(queryset=Images.objects.none())
    return render(request, 'core/product-form.html',
                  {'postForm': postForm, 'formset': formset})

This is the part that where I can get a queryset to fill a form, but when I go to save the form reloads blank with no images saying the fields are required

@login_required
def edit_product(request, pk):
    pro_in = get_object_or_404(Product, id=pk) 
    ImageFormSet = modelformset_factory(Images, fields='__all__', extra=20, max_num=20)
            #'extra' means the number of photos that you can upload   ^
    
    if request.method == 'GET':
        context = {'postForm': ProductForm(instance=pro_in), 'formset':ImageFormSet(queryset=Images.objects.filter(product_id=pk))}
        return render(request, 'core/product-form.html', context)

    if request.method == 'POST':
    
        postForm = ProductForm(request.POST, request.FILES, instance=pro_in)
        formset = ImageFormSet(request.POST, request.FILES, queryset=Images.objects.filter(product_id=pk))
    
    
        if postForm.is_valid() and formset.is_valid():
            post_form.save()
            fromset.save()
    
            # use django messages framework
            messages.success(request,
                             "Yeeew, check it out on the home page!")
            return HttpResponseRedirect("/")
        else:
            print(postForm.errors, formset.errors)
    else:
        postForm = ProductForm()
        formset = ImageFormSet(queryset=Images.objects.none())
    return render(request, 'core/product-form.html',
                  {'postForm': postForm, 'formset': formset})

If you need to see my forms.py, and or urls.py just ask.

Any help is greatly appreciated!