From 94ce34d9aad35dac6079b3a2e61fbe8bd4a5df27 Mon Sep 17 00:00:00 2001
From: ds283 <D.Seery@sussex.ac.uk>
Date: Wed, 27 Mar 2024 15:37:10 +0000
Subject: [PATCH] Add index to liveproject_id in PopularityRecord

- attempting to speed up queries that involve joins to PopularityRecord
---
 app/models.py                                 |  2 +-
 ...84579fb_add_index_to_liveproject_id_in_.py | 32 +++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 migrations/versions/12c4584579fb_add_index_to_liveproject_id_in_.py

diff --git a/app/models.py b/app/models.py
index 6e033d69..7c320bbe 100644
--- a/app/models.py
+++ b/app/models.py
@@ -12349,7 +12349,7 @@ class PopularityRecord(db.Model):
     id = db.Column(db.Integer(), primary_key=True)
 
     # tag LiveProject to which this record applies
-    liveproject_id = db.Column(db.Integer(), db.ForeignKey("live_projects.id"))
+    liveproject_id = db.Column(db.Integer(), db.ForeignKey("live_projects.id"), index=True)
     liveproject = db.relationship(
         "LiveProject", uselist=False, backref=db.backref("popularity_data", lazy="dynamic", cascade="all, delete, delete-orphan")
     )
diff --git a/migrations/versions/12c4584579fb_add_index_to_liveproject_id_in_.py b/migrations/versions/12c4584579fb_add_index_to_liveproject_id_in_.py
new file mode 100644
index 00000000..1c539cb3
--- /dev/null
+++ b/migrations/versions/12c4584579fb_add_index_to_liveproject_id_in_.py
@@ -0,0 +1,32 @@
+"""Add index to liveproject_id in PopularityRecord
+
+Revision ID: 12c4584579fb
+Revises: 95dce27755c3
+Create Date: 2024-03-27 15:35:47.978259
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '12c4584579fb'
+down_revision = '95dce27755c3'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('popularity_record', schema=None) as batch_op:
+        batch_op.create_index(batch_op.f('ix_popularity_record_liveproject_id'), ['liveproject_id'], unique=False)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('popularity_record', schema=None) as batch_op:
+        batch_op.drop_index(batch_op.f('ix_popularity_record_liveproject_id'))
+
+    # ### end Alembic commands ###