[backend] Fix environment view

beat/web/backend/models.py

@@ -45,14 +45,14 @@ from guardian.shortcuts import get_perms
 import beat.core.stats
 import beat.core.data
 
-from ..common.models import Shareable
+from ..common.models import Shareable, ShareableManager
 from ..common.texts import Messages
 
 
 #----------------------------------------------------------
 
 
-class EnvironmentManager(models.Manager):
+class EnvironmentManager(ShareableManager):
 
     def get_by_natural_key(self, key):
         name, version = key.rsplit(' ', 1)