gistfile1.py

import cgi
from google.appengine.ext import blobstore

from django.contrib import admin
from django import forms

from .models import FileDownload


class DLAdminForm(forms.ModelForm):

    class Meta:
        model = FileDownload
        widgets = {
          'file_blobinfo': forms.FileInput(),
        }


class DownloadAdmin(admin.ModelAdmin):

    form = DLAdminForm

    def render_change_form(self, request, context, add=False, change=False, form_url='', obj=None):
        upload_url = blobstore.create_upload_url(request.get_full_path())
        return super(DownloadAdmin, self).render_change_form(request, context, add=False, change=False, form_url=upload_url, obj=None)

    def save_model(self, request, obj, form, change):
        meta = request.META
        meta['wsgi.input'].seek(0)
        fields = cgi.FieldStorage(meta['wsgi.input'], environ=meta)
        blobkey = fields['file_blobinfo'].type_options['blob-key']
        obj.file_blobinfo = blobkey
        obj.file_name = fields['file_blobinfo'].filename
        obj.save()

admin.site.register(FileDownload, DownloadAdmin)