javascript - Rails - 如何在发出请求之前修改 http 参数？

Question

我正在做一个汽车销售网站，我应用了一些过滤器。

对于用户体验，我自动添加了符号 € 和一些空格。

但现在我想要的是，当用户按下提交按钮时，在发出请求之前删除空格和符号(在这种特殊情况下，参数 price_start 将是 price_start =2500 而不是 price_start=2+500+EUR)

我想用 Jquery 做到这一点，但我真的不知道如何......我感谢任何帮助!谢谢:)

这是我的 html:

<%= form_tag(filter_vehicles_path, method: 'get') do %>
 <h4><strong>

  <span>Fabricante</span>
  <%= collection_select :manufacturer, :manufacturer_id, Manufacturer.joins(:vehicles).uniq, :id, :name, {include_blank: true}, {class: "manufacturer_dropdown"} %>

  <span>Modelo</span>
  <%= grouped_collection_select :model, :model_id, Manufacturer.order(:name), :models, :name,  :id, :name, {include_blank: true}, {class: "model_dropdown", data: {models: @models}} %>

  <span>Preço</span>
  <%= select_tag :price_start, options_for_select([ "250 €", "500 €", "1000 €", "2 000 €", "3 000 €", "4 000 €", "5 000 €", "6 000 €", "7 000 €", "8 000 €", "9 000 €", "10 000 €", "12 000 €", "14 000 €", "16 000 €", "18 000 €", "20 000 €", "22 000 €", "24 000 €", "26 000 €", "28 000 €", "30 000 €", "32 000 €", "34 000 €", "36 000 €", "38 000 €", "40 000 €", "50 000 €", "60 000 €", "70 000 €", "80 000 €", "90 000 €", "100 000 €", "150 000 €", "200 000 €"]), include_blank: true, class:"select2PriceFrom" %>
  <%= select_tag :price_ending, options_for_select([ "250 €", "500 €", "1000 €", "2 000 €", "3 000 €", "4 000 €", "5 000 €", "6 000 €", "7 000 €", "8 000 €", "9 000 €", "10 000 €", "12 000 €", "14 000 €", "16 000 €", "18 000 €", "20 000 €", "22 000 €", "24 000 €", "26 000 €", "28 000 €", "30 000 €", "32 000 €", "34 000 €", "36 000 €", "38 000 €", "40 000 €", "50 000 €", "60 000 €", "70 000 €", "80 000 €", "90 000 €", "100 000 €", "150 000 €", "200 000 €"]), include_blank: true, class:"select2PriceTo" %>

  <span>Ano</span>
  <%= select_tag :year_start, options_for_select((1990..Date.today.year).to_a.reverse + ["1980", "1970", "1960", "1950", "1940", "1930", "1920", "1910", "1900"]), include_blank: true, class:"select2From" %>
  <%= select_tag :year_start, options_for_select((1990..Date.today.year).to_a.reverse + ["1980", "1970", "1960", "1950", "1940", "1930", "1920", "1910", "1900"]), include_blank: true, class:"select2To" %>

  <span>Quilómetros</span>
  <%= select_tag :kms_start, options_for_select([ "5 000 km", "10 000 km", "15 000 km", "20 000 km", "25 000 km", "30 000 km", "35 000 km", "50 000 km", "75 000 km", "100 000 km", "125 000 km", "150 000 km", "200 000 km", "250 000 km", "300 000 km", "350 000 km", "400 000 km", "450 000 km", "500 000 km"]), include_blank: true, class:"select2From" %>
  <%= select_tag :kms_end, options_for_select([ "5 000 km", "10 000 km", "15 000 km", "20 000 km", "25 000 km", "30 000 km", "35 000 km", "50 000 km", "75 000 km", "100 000 km", "125 000 km", "150 000 km", "200 000 km", "250 000 km", "300 000 km", "350 000 km", "400 000 km", "450 000 km", "500 000 km"]), include_blank: true, class:"select2To" %>

  <%= submit_tag "Pesquisar" %>
 </strong></h4>
<% end %>

Answer 1

options_for_select helper 允许您使用数组数组指定与格式化输出不同的值:

<%= select_tag :price_start, options_for_select([ ["250 €","250"], ["500 €", "500"], ["1000 €", "1000"] ]) %>

您甚至可以为此编写一个助手来简化重写大量条目:

module ApplicationHelper

  def option(value)
    ["#{value} €", "#{value}"]
  end
end

<%= select_tag :price_start, options_for_select([ option(250), option(500), option(1000) ]) %>