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