Define a new column to store the digest of the list of guests included in a simulation

app/models/tables_arrangement.rb

@@ -8,6 +8,7 @@
 #
 #  id            :uuid             not null, primary key
 #  discomfort    :integer
+#  guests_digest :uuid             not null
 #  name          :string           not null
 #  created_at    :datetime         not null
 #  updated_at    :datetime         not null

db/migrate/20250126091823_add_guests_digest_column_to_tables_arrangements.rb

@@ -0,0 +1,5 @@
+class AddGuestsDigestColumnToTablesArrangements < ActiveRecord::Migration[8.0]
+  def change
+    add_column :tables_arrangements, :guests_digest, :uuid, null: false, default: 'gen_random_uuid()'
+  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[8.0].define(version: 2024_12_16_231415) do
+ActiveRecord::Schema[8.0].define(version: 2025_01_26_091823) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
 
@@ -206,6 +206,7 @@ ActiveRecord::Schema[8.0].define(version: 2024_12_16_231415) do
     t.datetime "updated_at", null: false
     t.string "name", null: false
     t.uuid "wedding_id", null: false
+    t.uuid "guests_digest", default: -> { "gen_random_uuid()" }, null: false
     t.index ["wedding_id"], name: "index_tables_arrangements_on_wedding_id"
   end