Redmine

I'm writing a redmine plugin using: IssueQuery
where when I want to use :
myquery.add_filter("issue_id" , "=", ["123", "124","125"])
I got only the first issue.
finally i find the function:sql_for_issue_id_field

  def sql_for_issue_id_field(field, operator, value)
    if operator == "=" 
      # accepts a comma separated list of ids
      ids = value.first.to_s.scan(/\d+/).map(&:to_i)
      if ids.present?
        "#{Issue.table_name}.id IN (#{ids.join(",")})" 
      else
        "1=0" 
      end
    else
      sql_for_field("id", operator, value, Issue.table_name, "id")
    end
  end

I seems that the "first" is a error?

BTW: i'm new to ruby and redmine.