Django - How to Create a File and Save It to a Model's Filefield

Django - how to create a file and save it to a model's FileField?

You want to have a look at FileField and FieldFile in the Django docs, and especially FieldFile.save().

Basically, a field declared as a FileField, when accessed, gives you an instance of class FieldFile, which gives you several methods to interact with the underlying file. So, what you need to do is:

self.license_file.save(new_name, new_contents)

where new_name is the filename you wish assigned and new_contents is the content of the file. Note that new_contents must be an instance of either django.core.files.File or django.core.files.base.ContentFile (see given links to manual for the details).

The two choices boil down to:

from django.core.files.base import ContentFile, File

# Using File
with open('/path/to/file') as f:
    self.license_file.save(new_name, File(f))

# Using ContentFile
self.license_file.save(new_name, ContentFile('A string with the file content'))

Django : generate a file then save it in a FileField

When running self.contract.save(filename, f) add the save parameter through as shown below.

This will not run the Contract instance save method, which is causing your recursion.

self.contract.save(filename, f, save=False)

I would also recommend using with ... when opening files so they don't stay open. Shown below:

def save(self, *args, **kwargs):
    filename = self.generate_contract()
    with open(filename, "r") as f:
        self.contract.save(filename, f)
    return super().save(*args, **kwargs)

Django - How to automatically create a .docx file and save it to a model's FileField?

I am assuming you are using docxtpl and python docx. docx can save in byte like objects.

Something like this should work:

import io
def populate_docx(self, template_path, context):
        
        draft_lease = DocxTemplate(template_path) /// Gets the template
        draft_lease.render(context) /// Populates the template
        file_bytes = io.BytesIO()
        draft_lease.save(file_bytes)
        file_bytes.seek(0)
        self.lease_draft.save('Lease #12345', ContentFile(file_bytes.read()))

How to Create and Save File in Django Model

It seems like your view is quite close to doing what you want. In your model, add a FileField for order_file:

class Orders(models.Model):

    ...
    order_file = models.FileField(upload_to='path/to/storage/', null=True, blank=True)

Then in your view, save the BytesIO object you've created to the order_file field in the Orders object with the correct reference_id by wrapping it in a File object:

from django.core.files import File

def docjawn(request):

    reference = request.POST.get('Reference_IDs')
    manifest = Manifests.objects.all().filter(reference__reference=reference)
    order = Orders.objects.get(reference=reference)

    # Generate doc file
    ...

    doc_io = io.BytesIO()
    doc.save(doc_io)
    doc_io.seek(0)

    # Save the BytesIO to the field here
    order.order_file.save("generated_doc.docx", File(doc_io))

    response = HttpResponse(doc_io.read())
    response["Content-Disposition"] = "attachment; filename=generated_doc.docx"
    response["Content-Type"] = "application/vnd.openxmlformats-officedocument.wordprocessingml.document"

    return response

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