没有路线匹配{：action =>“ show”，：controller =>“ restaurants”}

问题描述

如果我要转到主页，请单击地图localhost：3000 / maps退出此错误没有路由匹配{：action => show，：controller => restaurants}

controllers / maps_controller.rb

If I want to go with my home page clicking on the map localhost:3000/maps gets out this error No route matches {:action=>"show", :controller=>"restaurants"}
controllers/maps_controller.rb

def index
    @maps = Map.all
    @json = Map.all.to_gmaps4rails do |map, marker|
       marker.infowindow info_for_restaurant(map.restaurant)
    end


    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @maps }
    end
end
def show
    @map = Map.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @map }
    end
end
private
def info_for_restaurant(restaurant)
  link_to restaurant_path do
    content_tag("h2") do
      restaurant.name
    end
  end
end

routes.rb

routes.rb

resources :restaurants
resources :maps

这是我的问题的答案：

controllers / maps_controller.rb

This is answer for my question:
controllers/maps_controller.rb

def index
    @maps = Map.all
    @json = Map.all.to_gmaps4rails do |map, marker|
      marker.infowindow render_to_string(:partial => "/maps/maps_link",
        :layout => false, :locals => { :map => map})
    end


    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @maps }
    end
  end

视图/地图/_maps_link.html.erb

views/maps/_maps_link.html.erb

<div class="map-link">
<h2><%= link_to map.restaurant.title, map.restaurant %></h2>
</div>

推荐答案

您的方法在多个级别上是错误的。让我们一次处理它们：

Your approach is wrong in several levels. Let's work on them, one at a time:

1）您对路由助手的呼叫是错误的：

restaurant_path 是 show 动作的路线帮助器。 show 动作需要一个 id 参数才有效。您的呼叫缺少一个参数。

restaurant_path is the route helper for a show action. A show action needs an id parameter to be valid. Your call is missing a parameter.

因此，您的代码必须是这样的：

So, your code must be something like this:

def info_for_restaurant(restaurant)
  link_to restaurant_path(restaurant) do
    content_tag("h2") do
      restaurant.name
    end
  end
end

要查看每个操作所需的参数，可以运行在控制台上使用耙路。

To see the parameters needed for each action, you can run rake routes on the console.

但是，这并不能解决问题，因为您也是：

However, this does not solve the problem, as you're also:

2）从您的控制器调用视图助手

link_to 和 content_tag 是视图帮助器方法，您不想让控制器麻烦于视图问题。因此，解决此问题的最佳方法是将 info_for_restaurant 方法移动到帮助器，然后从视图中调用它。

link_to and content_tag are view helper methods, and you don't want to bother your controller with view issues. So, the best way to solve this problem is to move your info_for_restaurant method to a helper, and call it from a view instead.

因此，现在，您的控制器将不会为<$​​ c $ c> @json 分配任何内容，并且视图的最后一行将如下所示：

So, now, your controller will not assign anything to @json, and the last line of your view will look like this:

<%= gmaps4rails @maps.to_gmaps4rails {|map, marker| marker.infowindow info_for_restaurant(map.restaurant) } %>

这篇关于没有路线匹配{：action =&gt;“ show”，：controller =&gt;“ restaurants”}的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！