帶elasticsearch的Select_tag

Question

我嘗試傳遞2個搜索選項。第一個[：q]用於訪問者的輸入文本，另一個來自模型露營「nomdep」（如英文部分）。當我嘗試通過輸入搜索它的作品，但因爲我嘗試添加select_tag我有一個錯誤

錯誤 未定義的方法'地圖」的零：NilClass

我迷路了，做ü有什麼想法？

對不起，我是法國人。

Home_controler.rb

def index 
     if params[:q].nil? 
     "Entrez un mot clef" 
     else 
     @campings = Camping.__elasticsearch__.search params[:q,:nomdep] 
     @camping = Camping.all 
    end 
    end 

def result 
     if params[:q].nil? 
     @campings = [] 
     else 
     @campings = Camping.__elasticsearch__.search(params[:q]).page(params[:page]).per(14).results 
     end 
end 

查看

<div class="search"> 
     <%= form_tag(result_path, method: :get) %> 
     <%= text_field_tag :q, params[:q], class:"search-query form-control" %> 
        <%= select_tag(:nomdep, options_for_select(@camping)) %> 

       <%= submit_tag "Partez", class:"btn btn-danger", name: nil %> 
    </div> 

---

編輯 現在我沒有任何錯誤，但搜索不工作，如果[：Q]空。所以，如果我只select_tag =>沒有結果。

這是怎麼解決的？

我的全home_controller.rb

class HomeController < ApplicationController 
    def index 
     @camping = Camping.all 
     if params[:q].nil? 
     "Entrez un mot clef" 
     else 
     @campings = Camping.__elasticsearch__.search params[:q, :nomdep] 
    end 
    end 

    def result 
     if params[:q].nil? 
     @campings = [] 
     else 
     @campings = Camping.__elasticsearch__.search(params[:q]).page(params[:page]).per(14).results 
     end 

end 
end 

我看來

<div class="search"> 
      <%= form_tag(result_path, method: :get) %> 
         <%= select_tag :nomdep, options_from_collection_for_select(@camping, :id, :nomdep), prompt: "Département" %> 
        <%= text_field_tag :q, params[:q], class:"search-query form-control" %> 
        <%= submit_tag "Partez", class:"btn btn-danger", name: nil %> 
     </div> 

Answer 1

@camping = Camping.all 

這個變量將是零，除非：●在PARAMS索引行動傳遞。 options_for_select（@camping）將嘗試對此變量調用#map，並在未初始化時引發錯誤。

你應該確保它被初始化。例如，嘗試重寫你的動作：

def index 
     @camping = Camping.all 
     if params[:q].nil? 
     "Entrez un mot clef" 
     else 
     @campings = Camping.__elasticsearch__.search params[:q] 
     end 
end 

Answer 2

我想對@Baradzed說一個大的大感謝！我們昨天談到了，他找到了一個完美的解決方案！

home_controller.rb

class HomeController < ApplicationController 
    def index 
     @camping = Departement.all 
     if params[:q].blank? || params[:nomdep].blank? 
     @campings = Camping.__elasticsearch__.search params[:nomdep] 
     else 
     @campings = Camping.__elasticsearch__.search params[:q] 

    end 
    end 



    def result 

    querystring = params.slice(:nomdep, :other_param, :any_params_except_q_because_we_will_process_q_separately) 
    .select{|k,v| v.present?} 
    .map {|key, value| "#{key}:\"#{value.gsub(/([#{Regexp.escape('\\+-&|!(){}[]^~*?:/')}])/, '\\\\\1') }\""} 
    .join(" AND ") 

    freetext = params[:q] 
    freetext.gsub!(/([#{Regexp.escape('\\+-&|!(){}[]^~*?:/')}])/, '\\\\\1') 

    querystring = ["*#{freetext}*",querystring].select{|v| v.present?}.join(" AND ") if params[:q].present? 

    if querystring.blank? 
    flash[:notice] = "Aucune mots clefs" 
    redirect_to action: :index and return 
    else 
    @campings = Camping.__elasticsearch__.search(
    query: { query_string: { 
    query: querystring 
    }}).page(params[:page]).per(14).results 
    end 


     @hash = Gmaps4rails.build_markers(@campings) do |camping, marker| 
      marker.lat camping.latitude 
      marker.lng camping.longitude 
      marker.infowindow render_to_string(:partial => "/campings/infowindow", :locals => { :camping => camping}) 
      marker.picture ({ 
      "url" => "http://avantjetaisriche.com/map-pin.png", 
      "width" => 29, 
      "height" => 32}) 
     end 
end 
end 

視圖

<div class="search"> 
      <%= form_tag(result_path, method: :get) %> 
         <%= select_tag :nomdep, options_from_collection_for_select(@camping, :nomdep, :nomdep), prompt: "Département" %> 
        <%= text_field_tag :q, params[:q], class:"search-query form-control" %> 
        <%= submit_tag "Partez", class:"btn btn-danger", name: nil %>