You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: rdb_taskboard_controller.rb
    path of file: ./repos/redmine_dashboard/app/controllers
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class RdbTaskboardController < RdbDashboardController
  menu_item :dashboard

  def boa
    
  def move
    return flash_error(:rdb_flash_invalid_request) unless (column = @board.columns[params[:column].to_s])

    # Get all status the user is allowed to assign and that are in the target column
    @statuses = @issue.new_statuses_allowed_to(User.current) & column.statuses

    if @statuses.empty?
      return flash_error :rdb_flash_illegal_workflow_action,
        issue: @issue.subject, source: @issue.status.name, target: column.title
    end