AO3-5995 Add boolean column named spam to comments table (#4499)

* add spam column to comments table

* hound

* default: 0 to default:false

db/migrate/20230418074141_add_spam_to_comments.rb

@@ -0,0 +1,49 @@
+class AddSpamToComments < ActiveRecord::Migration[6.0]
+  def up
+    if Rails.env.staging? || Rails.env.production?
+      database = Comment.connection.current_database
+
+      puts <<~PTOSC
+        Schema Change Command:
+
+        pt-online-schema-change D=#{database},t=comments \\
+          --alter "ADD COLUMN spam BOOLEAN NOT NULL DEFAULT 0" \\
+          --no-drop-old-table \\
+          -uroot --ask-pass --chunk-size=5k --max-flow-ctl 0 --pause-file /tmp/pauseme \\
+          --max-load Threads_running=15 --critical-load Threads_running=100 \\
+          --set-vars innodb_lock_wait_timeout=2 --alter-foreign-keys-method=auto \\
+          --execute
+
+        Table Deletion Command:
+
+        DROP TABLE IF EXISTS `#{database}`.`_comments_old`;
+      PTOSC
+    else
+      add_column :comments, :spam, :boolean, default: false, null: false
+    end
+  end
+
+  def down
+    if Rails.env.staging? || Rails.env.production?
+      database = Comment.connection.current_database
+
+      puts <<~PTOSC
+        Schema Change Command:
+
+        pt-online-schema-change D=#{database},t=comments \\
+          --alter "DROP COLUMN spam" \\
+          --no-drop-old-table \\
+          -uroot --ask-pass --chunk-size=5k --max-flow-ctl 0 --pause-file /tmp/pauseme \\
+          --max-load Threads_running=15 --critical-load Threads_running=100 \\
+          --set-vars innodb_lock_wait_timeout=2 --alter-foreign-keys-method=auto \\
+          --execute
+
+        Table Deletion Command:
+
+        DROP TABLE IF EXISTS `#{database}`.`_comments_old`;
+      PTOSC
+    else
+      remove_column :comments, :spam
+    end
+  end
+end