Fix duplicated corpora when logged in as a regular user

arkindex/documents/managers.py

@@ -138,7 +138,7 @@ class CorpusManager(models.Manager):
         # * public corpus
         # * private with ACL
         qs = qs.prefetch_related('corpus_right')
-        qs = qs.filter(models.Q(public=True) | models.Q(corpus_right__user=user))
+        qs = qs.filter(models.Q(public=True) | models.Q(corpus_right__user=user)).distinct()
         return qs
 
     def writable(self, user):
@@ -153,4 +153,4 @@ class CorpusManager(models.Manager):
             return qs.all()
 
         # Authenticated users can write only on corpora with ACL
-        return qs.filter(corpus_right__user=user, corpus_right__can_write=True)
+        return qs.filter(corpus_right__user=user, corpus_right__can_write=True).distinct()