OpenConceptLab/ocl_issues#1035 Slow concepts select

Author: rkorytkowski

core/concepts/migrations/0020_auto_20211012_1025.py

@@ -0,0 +1,21 @@
+# Generated by Django 3.2.7 on 2021-10-12 10:25
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('concepts', '0019_auto_20210914_1420'),
+    ]
+
+    operations = [
+        migrations.RemoveIndex(
+            model_name='concept',
+            name='concepts_is_acti_7190c6_idx',
+        ),
+        migrations.AddIndex(
+            model_name='concept',
+            index=models.Index(fields=['is_active', 'retired', 'is_latest_version', 'public_access', 'updated_at'], name='concepts_is_acti_ee42ab_idx'),
+        ),
+    ]

core/concepts/models.py

@@ -143,7 +143,7 @@ class Meta:
         db_table = 'concepts'
         unique_together = ('mnemonic', 'version', 'parent')
         indexes = [
-            models.Index(fields=['is_active', 'retired', 'is_latest_version', 'public_access']),
+            models.Index(fields=['is_active', 'retired', 'is_latest_version', 'public_access', 'updated_at']),
         ] + VersionedModel.Meta.indexes
 
     external_id = models.TextField(null=True, blank=True)