[common][utils] Move annotation method here

beat/web/common/utils.py

@@ -31,6 +31,8 @@ Reusable help functions
 from django.core.exceptions import ValidationError
 from django.utils.encoding import force_text
 from django.utils import six
+from django.db.models import CharField, Value as V
+from django.db.models.functions import Concat
 
 from docutils import utils
 from docutils.nodes import Element
@@ -145,3 +147,21 @@ def py3_cmp(a, b):
       https://docs.python.org/3.0/whatsnew/3.0.html#ordering-comparisons
     """
     return (a > b) - (a < b)
+
+
+def annotate_full_name(db_class):
+    """
+    Annotate a query with the asset full name so that it can be more easily
+    filtered.
+    """
+
+    return db_class.objects.annotate(
+        full_name=Concat(
+            "author__username",
+            V("/"),
+            "name",
+            V("/"),
+            "version",
+            output_field=CharField(),
+        )
+    )