ruby-on-rails - Rails 4 搜索多个参数

Question

如果存在两个参数，我正在寻找搜索和查找结果，但我被发送到 car_show_path，但应该有结果。

模型

class Car < ActiveRecord::Base
  def self.search(car_number, car_model) 
    where(['car_number = ? AND car_model = ?', "%#{car_number}%", "%#{car_model}%"])
  end
end

Controller 展示

 @search = Car.search(params[:car_number], params[:car_model])
   if @search.present?
       @search
    else
     redirect_to car_path, notice: "Not a valid combination"
    end

形式

<%= simple_form_for :search, url: car_show_path do |f| %>
  <%= f.input :car_number, :collection => @car.collect {|c| [c.number]}, :include_blank => false %>
  <%= f.input :car_model, placeholder: "Car Model" %>
  <%= f.button :submit, 'Generate', class: 'btn' %>
<% end %>

Answer 1

你做错了。如果您查看服务器日志中生成的 params 哈希，您可以看到类似这样的内容 :search => {:car_model => "value", :car_number => "Value"} .这意味着 :car_model 的值和 :car_number无法使用 params[:car_model] 检索和 params[:car_number] , 而你应该使用 params[:search][:car_model]和 params[:search][:car_number]

@search = Car.search(params[:search][:car_number], params[:search][:car_model])
if @search.present?
  @search
else
  redirect_to car_path, notice: "Not a valid combination"
end