CODEWITHSUNDEEP
djangodjango-formspython-imaging-library
tester
tester

Reputation: 23159

Django Form validate PIL Image as ImageField

Say I have a model and form that support file uploads:

class Foo(Document):
    name = StringField()
    file = FileField()


class FooForm(Form):
    name = CharField()
    file = ImageField()

    def save(self):
        Foo(name=self.cleaned_data['name'], file=self.cleaned_data['file']).save()

When POSTing from the actual browser form.is_valid() returns True, so we can call save()

When I go to use FooForm to take a PIL Image (specifically a <PIL.Image._ImageCrop image mode=RGB size=656x677 at 0x10F6812D8>), is_valid() is False because form.errors says: 

load a valid image. The file you uploaded was either not an image or a corrupted image.

Here's what I'm trying to do to save the form:

img = ... our PIL image ...
post = {'name': name}
file = {'file': img}
form = FooForm(post, file)
if form.is_valid():
    form.save()

See what I'm doing wrong that's causing is_valid() to be False?

Edit: I think this issue is more about coercing PIL Image to something BaseForm's files parameter accepts.

Upvotes: 1

Views: 732

Answers (2)

tester
tester

Reputation: 23159

This ended up being my solution to get the FooForm to properly validate. I'm sure there's a better method.

img = ... our PIL image ...
buffer = StringIO()
img.save(buffer, 'png')
buffer.seek(0)
image_file = SimpleUploadedFile('foo.png', buffer.read(), content_type="image/png")
buffer.close()
post = {'name': name}
file = {'file': image_file}
form = FooForm(post, file)
if form.is_valid():
    form.save()

Upvotes: 1

arocks
arocks

Reputation: 2882

I would recommend changing the form initialisation to use a simple dictionary like this:

img = ... our PIL image ...
form = FooForm({'name': name, 'file': img})
if form.is_valid():
    form.save()

Upvotes: 0

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