I have 2 models Product and Image:
class Image(models.Model):
product = models.ForeignKey(Product, related_name='images', on_delete=
models.CASCADE)
parent = models.ForeignKey('self', blank=True, null=True,
verbose_name='original
image', on_delete=models.CASCADE)
image = models.ImageField(upload_to=file_upload_to)
image_type = models.CharField(max_length=50)
parent is a Foreign Key to the original image
I use the Image Model in a formset:
ImageFormSet = inlineformset_factory(parent_model=Product, model=Image,
form=ImageModelForm, min_num=1, max_num=4, can_delete=True)
Steps:
Set the Product Form with the inlineformset for Image
Show and submit the creation form
save the original image(s)
after the original image is saved, create multiple image by cropping
the original image, using a task
Edit/Update Form, show as image one of the cropped image (instead of
original) by modifying(filter by image_type) the Formset queryset
An here appear the issue:
The {{form.id}} value in case of update, is the pk(id) of the cropped
image, instead of the original image:
<input name="product-image-0-id" value="15" type="hidden">
and when the image is updated, is replacing the cropped image in database
instead of the original image, and the 'cropped' tasks after and insertion
in database is wrong.
I tried to replace the value(using a custom widget) instead of the cropped
image with the pk(id) of the original(parent_id).
but if I do, this, on updating/replacing an older image, the new replacing
image, is ignored; the form submit with no errors, but the replace image is
not replaced; the other new images are ok.
So I think is a mechanism that compares the value in the the input with
what was passed to the form, and if doesn't correspond is jut ignoring.
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