Wsrtjtyk

I'm using python 3.6 and Django 2.0.

I have a square image that I want uploaded to a model. I currently have an image field in a model that I can upload.

avatar             = models.ImageField(path_and_rename, max_length=255, blank=True

I want to resize whatever square image is uploaded to be 750 by 750. I thought of a way to do it, but I don't think I'm saving it as the right type as it is giving me an error.

'Image' object has no attribute '_committed'

How can I resize my square image to meet the new dimensions that I need.

My code (leaving out validation to make it simpler):

forms.py

def clean_avatar(self):

  avatar = self.cleaned_data['avatar']

  try:

    print(len(avatar))

    w, h = get_image_dimensions(avatar)

    max_width = max_height = 750

    image = Image.open(avatar)

    resized_image = image.resize((max_width,max_height), Image.ANTIALIAS)

    print(type(avatar))

    print(type(image))

    print(type(resized_image))

    return resized_image

  except

    ...

the output of the above is

<class 'django.core.files.uploadedfile.InMemoryUploadedFile'>

<class 'PIL.JpegImagePlugin.JpegImageFile'>

<class 'PIL.Image.Image'>

if I return avatar it works, but it doesnt' work when I return resized_image. How can I make the datatype of resized_image that of avatar?

Full error message:

File "C:myapplibsite-packagesdjangocorehandlersexception.py" in inner





35.             response = get_response(request)



File "C:myapplibsite-packagesdjangocorehandlersbase.py" in _get_response

  128.                 response = self.process_exception_by_middleware(e, request)



File "C:myapplibsite-packagesdjangocorehandlersbase.py" in _get_response

  126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)



File "C:myapplibsite-packagesdjangoviewsgenericbase.py" in view

  69.             return self.dispatch(request, *args, **kwargs)



File "C:myapplibsite-packagesdjangocontribauthmixins.py" in dispatch

  52.         return super().dispatch(request, *args, **kwargs)



File "C:myapplibsite-packagesdjangoviewsgenericbase.py" in dispatch

  89.         return handler(request, *args, **kwargs)



File "C:myapplibsite-packagesdjangoviewsgenericedit.py" in post

  194.         return super().post(request, *args, **kwargs)



File "C:myapplibsite-packagesdjangoviewsgenericedit.py" in post

  142.             return self.form_valid(form)



File "C:myapplibsite-packagesdjangoviewsgenericedit.py" in form_valid

  125.         self.object = form.save()



File "C:myapplibsite-packagesdjangoformsmodels.py" in save

  456.             self.instance.save()



File "C:myapplibsite-packagesdjangocontribauthbase_user.py" in save

  73.         super().save(*args, **kwargs)



File "C:myapplibsite-packagesdjangodbmodelsbase.py" in save

  729.                        force_update=force_update, update_fields=update_fields)



File "C:myapplibsite-packagesdjangodbmodelsbase.py" in save_base

  759.             updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)



File "C:myapplibsite-packagesdjangodbmodelsbase.py" in _save_table

  820.                       for f in non_pks]



File "C:myapplibsite-packagesdjangodbmodelsbase.py" in <listcomp>

  820.                       for f in non_pks]



File "C:myapplibsite-packagesdjangodbmodelsfieldsfiles.py" in pre_save

  285.         if file and not file._committed:



Exception Type: AttributeError at /account/details/

Exception Value: 'Image' object has no attribute '_committed'

I have done simillar thing, but not in forms. My approach was like this:

# override Model Save Method



class YourModel(models.Model):

  ...

  def save(self, **kwargs):

     resize = kwargs.pop('resize', False)

     instance = super(YourModel, self).save(**kwargs)

     if resize:

        pil_image = Image.open(self.avatar.path)

        # resize related code

        resized_image = pil_image.resize((max_width,max_height), Image.ANTIALIAS)

        resized_image.save(self.avatar.path)



     return instance

And call this save method from form like this:

 class YourForm(...):

     ...

     def save(self, commit=True):

        instance = super(YourForm, self).save(commit=False)

        instance.save(resize=True)  # call model save method from here

        return instance

Update

Maybe you can try like this:

import io 



# clean method

w, h = get_image_dimensions(avatar)

max_width = max_height = 750

image = Image.open(avatar)

resized_image = image.resize((max_width,max_height), Image.ANTIALIAS)

img_in_memory = io.BytesIO()

resized_image.save(img_in_memory, format="png")

return img_in_memory