Replace custom 'load_backend' with Django's 'import_string'.

mayan/apps/common/runtime.py

@@ -1,5 +1,5 @@
-from common.utils import load_backend
+from django.utils.module_loading import import_string
 
 from .settings import SHARED_STORAGE
 
-shared_storage_backend = load_backend(SHARED_STORAGE)()
+shared_storage_backend = import_string(SHARED_STORAGE)()

mayan/apps/common/utils.py

@@ -209,17 +209,6 @@ def copyfile(source, destination, buffer_size=1024 * 1024):
     destination_descriptor.close()
 
 
-def load_backend(backend_string):
-    logger.debug('loading: %s', backend_string)
-    module_name, klass = backend_string.rsplit('.', 1)
-
-    try:
-        return getattr(import_module(module_name), klass)
-    except ImportError as exception:
-        logger.debug('error importing: %s; %s', backend_string, exception)
-        raise
-
-
 def fs_cleanup(filename, suppress_exceptions=True):
     """
     Tries to remove the given filename. Ignores non-existent files

mayan/apps/converter/runtime.py

@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 import logging
 
-from common.utils import load_backend
+from django.utils.module_loading import import_string
 
 from .exceptions import OfficeBackendError
 from .office_converter import OfficeConverter
@@ -20,4 +20,4 @@ else:
     logger.debug('office_backend initialized')
 
 
-backend = load_backend(GRAPHICS_BACKEND)()
+backend = import_string(GRAPHICS_BACKEND)()

mayan/apps/documents/runtime.py

@@ -1,5 +1,5 @@
-from common.utils import load_backend
+from django.utils.module_loading import import_string
 
 from .settings import STORAGE_BACKEND
 
-storage_backend = load_backend(STORAGE_BACKEND)()
+storage_backend = import_string(STORAGE_BACKEND)()

mayan/apps/dynamic_search/classes.py

@@ -7,9 +7,9 @@ import re
 from django.core.exceptions import PermissionDenied
 from django.db.models import Q
 from django.db.models.loading import get_model
+from django.utils.module_loading import import_string
 
 from acls.models import AccessEntry
-from common.utils import load_backend
 from permissions.models import Permission
 
 from .settings import LIMIT
@@ -24,7 +24,7 @@ class SearchModel(object):
     def get(cls, full_name):
         result = cls.registry[full_name]
         if not hasattr(result, 'serializer'):
-            result.serializer = load_backend(result.serializer_string)
+            result.serializer = import_string(result.serializer_string)
 
         return result
 

mayan/apps/ocr/api.py

@@ -6,10 +6,11 @@ import tempfile
 
 import sh
 
+from django.utils.module_loading import import_string
 from django.utils.translation import ugettext_lazy as _
 
 from common.settings import TEMPORARY_DIRECTORY
-from common.utils import fs_cleanup, load_backend
+from common.utils import fs_cleanup
 from converter.api import convert
 from documents.models import DocumentPage
 
@@ -87,7 +88,7 @@ def ocr_cleanup(language, text):
     cleanup filter
     """
     try:
-        language_backend = load_backend('.'.join(['ocr', 'lang', language, 'LanguageBackend']))()
+        language_backend = import_string('.'.join(['ocr', 'lang', language, 'LanguageBackend']))()
     except ImportError:
         language_backend = None
 

mayan/apps/ocr/runtime.py

@@ -1,5 +1,5 @@
-from common.utils import load_backend
+from django.utils.module_loading import import_string
 
 from .settings import BACKEND
 
-ocr_backend = load_backend(BACKEND)()
+ocr_backend = import_string(BACKEND)()

mayan/apps/rest_api/classes.py

@@ -2,8 +2,7 @@ from __future__ import unicode_literals
 
 from django.conf.urls import include, patterns, url
 from django.conf import settings
-
-from common.utils import load_backend
+from django.utils.module_loading import import_string
 
 
 class APIEndPoint(object):
@@ -24,7 +23,7 @@ class APIEndPoint(object):
         self.name = name
         self.endpoints = []
         try:
-            api_urls = load_backend('{0}.urls.api_urls'.format(app_name or name))
+            api_urls = import_string('{0}.urls.api_urls'.format(app_name or name))
         except Exception:
             if settings.DEBUG:
                 raise