Add index for looking up User by username

bookwyrm/migrations/0202_user_bookwyrm_us_usernam_b2546d_idx.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.25 on 2024-04-03 19:14
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookwyrm", "0201_keypair_bookwyrm_ke_remote__472927_idx"),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name="user",
+            index=models.Index(
+                fields=["username"], name="bookwyrm_us_usernam_b2546d_idx"
+            ),
+        ),
+    ]

bookwyrm/models/user.py

@@ -198,6 +198,13 @@ class User(OrderedCollectionPageMixin, AbstractUser):
     hotp_secret = models.CharField(max_length=32, default=None, blank=True, null=True)
     hotp_count = models.IntegerField(default=0, blank=True, null=True)
 
+    class Meta(AbstractUser.Meta):
+        """indexes"""
+
+        indexes = [
+            models.Index(fields=["username"]),
+        ]
+
     @property
     def active_follower_requests(self):
         """Follow requests from active users"""