def f10
    @stock = Stock.find params[:id]

    if @stock.big_broad?
      @f10s = StockF10::BIG_BROAD_F10
    elseif @stock.stock?
      @f10s = StockF10::STOCK_F10s
    elseif @stock.fund?
      @f10s = StockF10::FUND_F10s
    end

    puts @stock.big_broad?
    puts @stock.stock?
    puts StockF10::STOCK_F10s
    puts @f10s
  end

输出结果

false
true
{1=>"最新提示", 2=>"公司概况", 3=>"财务分析", 4=>"股东研究", 5=>"股本股改", 6=>"风险因素", 7=>"公司报导", 8=>"行业分析", 9=>"公司大事", 10=>"港澳分析", 11=>"经营分析", 12=>"主
力追踪", 13=>"分红扩股", 14=>"高层治理", 15=>"百家争鸣", 16=>"关联个股"}

谁能告诉我@f10s为什么是空呢？