Add index on comment.user_id (#992)

mwdb/model/comment.py

@@ -16,7 +16,10 @@ class Comment(db.Model):
         index=True,
     )
     user_id = db.Column(
-        db.Integer, db.ForeignKey("user.id", ondelete="SET NULL"), nullable=True
+        db.Integer,
+        db.ForeignKey("user.id", ondelete="SET NULL"),
+        nullable=True,
+        index=True,
     )
 
     author = db.relationship("User", lazy="joined")

mwdb/model/migrations/versions/52bb55f76ef3_add_index_on_comment_user_id.py

@@ -0,0 +1,27 @@
+"""Add index on comment.user_id
+
+Revision ID: 52bb55f76ef3
+Revises: 2c44b2073670
+Create Date: 2024-10-18 10:36:52.350767
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "52bb55f76ef3"
+down_revision = "2c44b2073670"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_index(op.f("ix_comment_user_id"), "comment", ["user_id"], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f("ix_comment_user_id"), table_name="comment")
+    # ### end Alembic commands ###