Add a view for cut conversion rates by id.

.gitignore

@@ -23,7 +23,6 @@ cobra_test
 # Ignore db dumps
 *.data
 *.data.gz
-*.sql
 *.sql.gz
 
 public/scoop.png

Gemfile

@@ -26,6 +26,7 @@ gem 'pundit'
 gem 'rails', '~> 7'
 gem 'rqrcode'
 gem 'sassc-rails'
+gem 'scenic'
 gem 'simple_form'
 gem 'slim-rails'
 gem 'turbolinks', '~> 5'

Gemfile.lock

@@ -370,6 +370,9 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
+    scenic (1.8.0)
+      activerecord (>= 4.0.0)
+      railties (>= 4.0.0)
     securerandom (0.4.1)
     simple_form (5.3.1)
       actionpack (>= 5.2)
@@ -481,6 +484,7 @@ DEPENDENCIES
   rubocop-rspec
   rubocop-rspec_rails
   sassc-rails
+  scenic
   simple_form
   simplecov
   simplecov-cobertura

db/migrate/20250217212451_create_cut_conversion_rates.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class CreateCutConversionRates < ActiveRecord::Migration[7.2]
+  def change
+    create_view :cut_conversion_rates
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2025_02_17_194837) do
+ActiveRecord::Schema[7.2].define(version: 2025_02_17_212451) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -253,4 +253,77 @@
   add_foreign_key "standing_rows", "players"
   add_foreign_key "standing_rows", "stages"
   add_foreign_key "tournaments", "users"
+
+  create_view "cut_conversion_rates", sql_definition: <<-SQL
+      WITH corps AS (
+           SELECT s_1.tournament_id,
+              s_1.number AS stage_number,
+              s_1.id AS stage_id,
+              'corp'::text AS side,
+              COALESCE(id.name, 'Unspecified'::character varying) AS identity,
+              COALESCE(id.faction, 'Unspecified'::character varying) AS faction
+             FROM (((stages s_1
+               JOIN registrations r ON ((s_1.id = r.stage_id)))
+               JOIN players p ON ((r.player_id = p.id)))
+               LEFT JOIN identities id ON ((p.corp_identity_ref_id = id.id)))
+          ), runners AS (
+           SELECT s_1.tournament_id,
+              s_1.number AS stage_number,
+              s_1.id AS stage_id,
+              'runner'::text AS side,
+              COALESCE(id.name, 'Unspecified'::character varying) AS identity,
+              COALESCE(id.faction, 'Unspecified'::character varying) AS faction
+             FROM (((stages s_1
+               JOIN registrations r ON ((s_1.id = r.stage_id)))
+               JOIN players p ON ((r.player_id = p.id)))
+               JOIN identities id ON ((p.runner_identity_ref_id = id.id)))
+          ), combined AS (
+           SELECT corps.tournament_id,
+              corps.stage_number,
+              corps.stage_id,
+              corps.side,
+              corps.identity,
+              corps.faction
+             FROM corps
+          UNION ALL
+           SELECT runners.tournament_id,
+              runners.stage_number,
+              runners.stage_id,
+              runners.side,
+              runners.identity,
+              runners.faction
+             FROM runners
+          ), swiss AS (
+           SELECT combined.tournament_id,
+              combined.stage_id,
+              combined.stage_number,
+              combined.side,
+              combined.identity,
+              combined.faction,
+              count(*) AS num_players
+             FROM combined
+            WHERE (combined.stage_number = 1)
+            GROUP BY combined.tournament_id, combined.stage_id, combined.stage_number, combined.side, combined.identity, combined.faction
+          ), cut AS (
+           SELECT combined.tournament_id,
+              combined.stage_id,
+              combined.stage_number,
+              combined.side,
+              combined.identity,
+              combined.faction,
+              count(*) AS num_players
+             FROM combined
+            WHERE (combined.stage_number = 2)
+            GROUP BY combined.tournament_id, combined.stage_id, combined.stage_number, combined.side, combined.identity, combined.faction
+          )
+   SELECT s.tournament_id,
+      s.side,
+      s.identity,
+      sum(s.num_players) AS num_swiss_players,
+      sum(COALESCE(c.num_players, (0)::bigint)) AS num_cut_players,
+      ((sum(COALESCE(c.num_players, (0)::bigint)) / sum(s.num_players)) * (100)::numeric) AS cut_conversion_percentage
+     FROM (swiss s
+       LEFT JOIN cut c USING (tournament_id, side, identity))
+    GROUP BY s.tournament_id, s.side, s.identity;
+  SQL
 end

db/views/cut_conversion_rates_v01.sql

@@ -0,0 +1,77 @@
+WITH corps AS (
+    SELECT s.tournament_id,
+        s.number AS stage_number,
+        s.id AS stage_id,
+        'corp' AS side,
+        COALESCE(id.name, 'Unspecified') as identity,
+        COALESCE(id.faction, 'Unspecified') as faction
+    FROM stages s
+        JOIN registrations r ON s.id = r.stage_id
+        JOIN players p ON r.player_id = p.id
+        LEFT JOIN identities AS id ON p.corp_identity_ref_id = id.id
+),
+runners AS (
+    SELECT s.tournament_id,
+        s.number AS stage_number,
+        s.id AS stage_id,
+        'runner' AS side,
+        COALESCE(id.name, 'Unspecified') as identity,
+        COALESCE(id.faction, 'Unspecified') as faction
+    FROM stages s
+        JOIN registrations r ON s.id = r.stage_id
+        JOIN players p ON r.player_id = p.id
+        JOIN identities AS id ON p.runner_identity_ref_id = id.id
+),
+combined AS (
+    SELECT *
+    FROM corps
+    UNION ALL
+    SELECT *
+    FROM runners
+),
+swiss AS (
+    SELECT tournament_id,
+        stage_id,
+        stage_number,
+        side,
+        identity,
+        faction,
+        COUNT(*) AS num_players
+    FROM combined
+    WHERE stage_number = 1
+    GROUP BY 1,
+        2,
+        3,
+        4,
+        5,
+        6
+),
+cut AS (
+    SELECT
+        tournament_id,
+        stage_id,
+        stage_number,
+        side,
+        identity,
+        faction,
+        COUNT(*) AS num_players
+    FROM combined
+    WHERE stage_number = 2
+    GROUP BY
+        tournament_id,
+        stage_id,
+        stage_number,
+        side,
+        identity,
+        faction
+)
+SELECT
+    s.tournament_id,
+    s.side,
+    s.identity,
+    SUM(s.num_players) AS num_swiss_players,
+    SUM(COALESCE(c.num_players, 0)) AS num_cut_players,
+    (SUM(COALESCE(c.num_players, 0)) / SUM(s.num_players)) * 100 AS cut_conversion_percentage
+FROM swiss s
+    LEFT JOIN cut c USING (tournament_id, side, identity)
+GROUP BY s.tournament_id, s.side, s.identity;