load to in-mem using ORM's values_list

care/facility/static_data/medibase.py

@@ -1,20 +1,33 @@
+from django.db.models import CharField, TextField, Value
+from django.db.models.functions import Coalesce
+
 from care.facility.models.prescription import MedibaseMedicine
 
 
 def load_medibase_in_memory():
-    medibase_objects = MedibaseMedicine.objects.all()
-    return tuple(
-        (
-            obj.external_id,
-            obj.name,
-            obj.type,
-            obj.generic or "",
-            obj.company or "",
-            obj.contents or "",
-            obj.cims_class or "",
-            obj.atc_classification or "",
+    return (
+        MedibaseMedicine.objects.all()
+        .annotate(
+            generic_pretty=Coalesce("generic", Value(""), output_field=CharField()),
+            company_pretty=Coalesce("company", Value(""), output_field=CharField()),
+            contents_pretty=Coalesce("contents", Value(""), output_field=TextField()),
+            cims_class_pretty=Coalesce(
+                "cims_class", Value(""), output_field=CharField()
+            ),
+            atc_classification_pretty=Coalesce(
+                "atc_classification", Value(""), output_field=TextField()
+            ),
+        )
+        .values_list(
+            "external_id",
+            "name",
+            "type",
+            "generic_pretty",
+            "company_pretty",
+            "contents_pretty",
+            "cims_class_pretty",
+            "atc_classification_pretty",
         )
-        for obj in medibase_objects
     )