Question

我目前有这个哈希，

{ "meal"         => "Bomb mi ",
  "meal_type "   => "Bombwiches",
  "times_served" => "8AM to 3PM",
  "days_served"  => "Tuesday - Sunday",
  "notes"        => "Hoisin glazed shredded pork or tofu, fresh jalapenos, house-made pickled daikon & carrots, pickles, fresh cilantro, sriracha and a fried egg. ",
  "price"        => "13.25" }

我可以通过@menu_items[i]

访问irb

数据来自我正在使用Sinatra加载的csv

get "/menu" do
  data_file = 'rabbit-sinatra.csv'
  @menu_items = []
  CSV.foreach(data_file, headers: true, :encoding => 'utf-8') do |row|
    @menu_items << row.to_hash
  end
  erb :menu
end

然后我循环遍历这个并在erb中提取所有必要的值。

<% for i in 0..70 do %>
          <% if @menu_items[i]["meal_type"] == "Bombwiches" %>
            <div class="menu">
                <div class="foo"> <%= @menu_items[i]["meal"]%> </div>
                <div class="times_served"> <%= @menu_items[i]["times_served"]%> </div>
                <div class="days_served"> <%= @menu_items[i]["days_served"]%> </div>
                <div class="notes"> <%= @menu_items[i]["notes"]%> </div>
                <div class="price"> <%= @menu_items[i]["price"]%> </div>
            </div>
            <% end %>
          <% end %>

虽然@menu_items[i]["notes"]和所有其他哈希解析命令都有效，但由于某些原因，当我运行

时，初始的“用餐”值没有被提取

@menu_items[i]["meal"]

不返回用餐"meal" => "Bomb mi "的值，而是返回任何内容。

不确定我错过了什么。

Answer 1

无法重现。

i = 1
@menu_items[i] = 
    { "meal"         => "Bomb mi ",
      "meal_type "   => "Bombwiches",
      "times_served" => "8AM to 3PM",
      "days_served"  => "Tuesday - Sunday",
      "notes"        => "Hoisin glazed shredded pork or tofu, fresh jalapenos, house-made pickled daikon & carrots, pickles, fresh cilantro, sriracha and a fried egg. ",
      "price"        => "13.25" }

puts @menu_items[i]["price"] #=> "13.25"
puts @menu_items[i]["meal"] #=> "Bomb mi "

显然，它并不包含您的想法。

在ERB中通过CSV访问哈希时无法获得价值

1 个答案: