Refactor sequencer database task method

lib/active_record/sharding/database_tasks.rb

@@ -190,45 +190,43 @@ def drop_sequencer_database(args)
         end
 
         def create_table_sequencer_database(args)
-          sequencer_name = sequencer_name_or_error "create_table", args
-          sequencer = sequencer_or_error sequencer_name
-
+          sequencer = sequencer_or_error "create_table", args
           create_table_sql = "CREATE TABLE #{sequencer.table_name} (id BIGINT unsigned NOT NULL DEFAULT 0) ENGINE=MyISAM"
           execute sequencer.connection_name.to_s, create_table_sql
         end
 
         def insert_initial_record_sequencer_database(args)
-          sequencer_name = sequencer_name_or_error "insert_initial_record", args
-          sequencer = sequencer_or_error sequencer_name
-
+          sequencer = sequencer_or_error "insert_initial_record", args
           insert_initial_record_sql = "INSERT INTO #{sequencer.table_name} VALUES (0)"
           execute sequencer.connection_name.to_s, insert_initial_record_sql
         end
 
         private
 
         def exec_task_for_sequencer_database(task_name, args)
-          sequencer_name = sequencer_name_or_error task_name, args
-          sequencer = sequencer_or_error sequencer_name
+          sequencer = sequencer_or_error task_name, args
           __send__ task_name, sequencer.connection_name.to_s
         end
 
-        def sequencer_name_or_error(name, args)
+        def sequencer_or_error(task_name, args)
+          sequencer_name = sequencer_name_or_error task_name, args
+          fetch_sequencer_config sequencer_name.to_sym
+        rescue KeyError
+          $stderr.puts %(sequencer name "#{sequencer_name}" not found.)
+          exit
+        end
+
+        def sequencer_name_or_error(task_name, args)
           unless sequencer_name = args[:sequencer_name]
+            # rubocop:disable Metrics/LineLength
             $stderr.puts <<-MSG
-Missing sequencer_name. Find sequencer_name via `rake active_record:sharding:info` then call `rake "active_record:sharding:sequencer#{name}[$sequencer_name]"`.
+Missing sequencer_name. Find sequencer_name via `rake active_record:sharding:info` then call `rake "active_record:sharding:sequencer#{task_name}[$sequencer_name]"`.
           MSG
             exit
+            # rubocop:enable Metrics/LineLength
           end
           sequencer_name
         end
-
-        def sequencer_or_error(sequencer_name)
-          fetch_sequencer_config sequencer_name.to_sym
-        rescue KeyError
-          $stderr.puts %(sequencer name "#{sequencer_name}" not found.)
-          exit
-        end
       end
       extend TasksForSingleSequencerTask
     end # module DatabaseTasks