debianize-mobilizon/priv/repo/migrations/20211223141104_add_instance_materialized_view.exs
Thomas Citharel e717312de7
Introduce instances admin page
Signed-off-by: Thomas Citharel <tcit@tcit.fr>
2022-01-17 14:41:03 +01:00

65 lines
1.7 KiB
Elixir

defmodule Mobilizon.Storage.Repo.Migrations.AddInstanceMaterializedView do
use Ecto.Migration
def up do
execute("""
CREATE MATERIALIZED VIEW instances AS
SELECT
a.domain,
COUNT(DISTINCT(p.id)) AS person_count,
COUNT(DISTINCT(g.id)) AS group_count,
COUNT(DISTINCT(e.id)) AS event_count,
COUNT(f1.id) AS followers_count,
COUNT(f2.id) AS followings_count,
COUNT(r.id) AS reports_count,
SUM(COALESCE((m.file->>'size')::int, 0)) AS media_size
FROM actors a
LEFT JOIN actors p ON a.id = p.id AND p.type = 'Person'
LEFT JOIN actors g ON a.id = g.id AND g.type = 'Group'
LEFT JOIN events e ON a.id = e.organizer_actor_id
LEFT JOIN followers f1 ON a.id = f1.actor_id
LEFT JOIN followers f2 ON a.id = f2.target_actor_id
LEFT JOIN reports r ON r.reported_id = a.id
LEFT JOIN medias m ON m.actor_id = a.id
WHERE a.domain IS NOT NULL
GROUP BY a.domain;
""")
execute("""
CREATE OR REPLACE FUNCTION refresh_instances()
RETURNS trigger AS $$
BEGIN
REFRESH MATERIALIZED VIEW instances;
RETURN NULL;
END;
$$ LANGUAGE plpgsql;
""")
execute("""
DROP TRIGGER IF EXISTS refresh_instances_trigger ON actors;
""")
execute("""
CREATE TRIGGER refresh_instances_trigger
AFTER INSERT OR UPDATE OR DELETE
ON actors
FOR EACH STATEMENT
EXECUTE PROCEDURE refresh_instances();
""")
create_if_not_exists(unique_index("instances", [:domain]))
end
def down do
drop_if_exists(unique_index("instances", [:domain]))
execute("""
DROP FUNCTION IF EXISTS refresh_instances() CASCADE;
""")
execute("""
DROP MATERIALIZED VIEW IF EXISTS instances;
""")
end
end