Model (PDF to Image)

Using Django
1

Hello!

In my app, via post form I receive a PDF file.

models.py

class UploadFiles(models.Model):
    pdf = models.FileField(upload_to='pdf/')

In my views I’ve been able to convert the PDF file to images using the pdf2image library and storing the converted images in any folder I want. Now, I want to make the conversion in models so that I can store the path of the converted image in database and the images in “media/pdf/” (for further loop calls in templates).

But I’m confused about how to do this. What I’ve tried so far has been this:

#views.py

def converter(request):
    
    if request.method == 'POST':
        form = UploadFilesForm(request.POST ,request.FILES )
        
        if form.is_valid():
            pdf = form.save()
            pdf.convert()
          
    else:
        form = UploadFilesForm()
    
    context = {'form':form}
    return render(request, 'converter.html',context)

I’m having trouble specifically in the models.py section.

models.py

class UploadFiles(models.Model):                                  
    pdf = models.FileField(upload_to='pdf/')

    def convert(self):                              
        
      # Convert pdf to an image ( filename = converted image)
       
        UploadFiles.create(filename,'JPEG')
        self.save()

How should I save the converted images in my models? Is this the correct way to do it or should I save the converted images in other model somehow?

Thanks.

2

Are you keeping both the image and the original uploaded pdf? Or are you looking to keep only the image file?

If you’re only keeping the image file, I would recommend doing that processing in the view, working with the temporary file created by the upload process. (Django doesn’t automatically “clean up” unreferenced files uploaded into the media directory.)

4

I would like to keep only the image file. I think I’m working now with the temporary file since I am not saving the form yet but I’m able to convert the PDF to a PNG image and store it. However, I’m still confused about uploading the converted image into my models. Here’s what I’ve done:

models.py

class Files(models.Model):
    archivo = models.FileField(upload_to='pdf/')

views.py

from django.core.files.storage import default_storage
from django.core.files.base import ContentFile

def converter(request):
    
    if request.method == 'POST':
        form = UploadFilesForm(request.POST ,request.FILES )
        if form.is_valid():
            new_pdf = request.FILES['archivo']
            path = default_storage.save("file.pdf", ContentFile(new_pdf.read()))   
            path = settings.MEDIA_ROOT  + '/' + "file.pdf"
            images = convert_from_path(path,fmt='png',dpi=300,grayscale=True)
            image = images[0]
            image.save("imagen.png")
            
            # form.save(image)   How can I save the image in my models? 
    else:
        form = UploadFilesForm()
    
    context = {'form':form}
    return render(request, 'converter.html',context)

What could I be missing?

Thank you Sr.