Fix id default value with sequences

db/migrate/20240911015959_add_missing_sequences.rb

@@ -0,0 +1,43 @@
+class AddMissingSequences < ActiveRecord::Migration[7.1]
+  def up
+    up_sequence('gemmies')
+    up_sequence('compats')
+    up_sequence('github_notifications')
+    up_sequence('lockfiles')
+    up_sequence('rails_releases')
+  end
+
+  def down
+    down_sequence('gemmies')
+    down_sequence('compats')
+    down_sequence('github_notifications')
+    down_sequence('lockfiles')
+    down_sequence('rails_releases')
+  end
+
+  def down_sequence(_table_name)
+    # In case of rollback, remove the sequence and reset the column default
+    execute <<-SQL
+      ALTER TABLE #{_table_name} ALTER COLUMN id DROP DEFAULT;
+    SQL
+
+    execute <<-SQL
+      DROP SEQUENCE IF EXISTS #{_table_name}_id_seq;
+    SQL
+  end
+
+  def up_sequence(_table_name)
+    execute <<-SQL
+      CREATE SEQUENCE IF NOT EXISTS #{_table_name}_id_seq;
+    SQL
+
+    execute <<-SQL
+      ALTER TABLE #{_table_name} ALTER COLUMN id SET DEFAULT nextval('#{_table_name}_id_seq');
+    SQL
+
+    # If you have existing data, set the sequence value to the maximum current id to avoid conflicts
+    execute <<-SQL
+      SELECT setval('#{_table_name}_id_seq', COALESCE((SELECT MAX(id) FROM #{_table_name}), 1));
+    SQL
+  end
+end