How to Manually Create Django-Filer Files

2014-04-07 | #python, #solution, #webdev

Django-Filer has a sublime admin integration, but tells us nothing about possibilities to manually create files from a frontend for example, which is a somewhat strange omission. After some fiddling with the source I came up wiht the following lines of code to achieve this arcane magic:

from filer.models.imagemodels import Image
from filer.models.foldermodels import Folder
from filer import settings as filer_settings
from filer.utils.loader import load_object
def create_filer_image(upload, folder=None, owner=None):
  filename = upload.name
  for filer_class in filer_settings.FILER_FILE_MODELS:
    FileSubClass = load_object(filer_class)
    if FileSubClass.matches_file_type(filename, upload, None):
      FileForm = modelform_factory(
          model = FileSubClass,
          fields = ('original_filename', 'owner', 'file')
      )
      break
  uploadform = FileForm({'original_filename': filename, 'owner': owner}, {'file': upload})
  if uploadform.is_valid():
    file_obj = uploadform.save(commit=False)
    if not isinstance(file_obj, Image):
      raise ValidationError('the given file was no image')
    if folder is not None:
      folder_chain = []
      for index, folder_part in enumerate(filter(None, '{folder}'.format(folder=folder).split('/'))):
        parent_id = None if index == 0 else folder_chain[-1:][0].pk
        if folder_part in ('1', '2', '3', '4', '5', '6', '7', '8', '9',):
            folder_part = '0{part}'.format(part=folder_part)
        try:
          folder_obj = Folder.objects.get(name=folder_part, parent_id=parent_id, level=index)
        except Folder.DoesNotExist:
          folder_obj = Folder()
          folder_obj.name = folder_part
          folder_obj.level = index
          folder_obj.owner_id = owner
          folder_obj.parent_id = parent_id
          folder_obj.save()
        folder_chain.append(folder_obj)
      file_obj.folder_id = None if len(folder_chain) == 0 else folder_chain[-1:][0].pk
    else:
      file_obj.folder_id = None
    file_obj.is_public = filer_settings.FILER_IS_PUBLIC_DEFAULT
    file_obj.save()
    render_icons = file_obj.icons
    render_thumnails = file_obj.thumbnails
  else:
    raise ValidationError('file info didn\'t validate')
  return file_obj