def execute
  @issues = case params[:f]
            when issues_filter[:all] then @project.issues
            when issues_filter[:closed] then @project.issues.closed
            when issues_filter[:to_me] then @project.issues.opened.assigned(current_user)
            else @project.issues.opened
            end
  @issues = @issues.tagged_with(params[:label_name]) if params[:label_name].present?
  @issues = @issues.includes(:author, :project).order("updated_at")
  
  if params[:assignee_id].present?
    @issues = @issues.where(assignee_id: (params[:assignee_id] == '0' ? nil : params[:assignee_id]))
  end
  
  if params[:milestone_id].present?
    @issues = @issues.where(milestone_id: (params[:milestone_id] == '0' ? nil : params[:milestone_id]))
  end
  @issues
end