没有路线匹配 [GET] "/users/1/categories/5"答案

【问题标题】：No route matches [GET] "/users/1/categories/5"没有路线匹配 [GET] "/users/1/categories/5"
【发布时间】：2015-11-12 21:22:49
【问题描述】：

我正在尝试从特定类别中查询用户喜欢的所有项目的数据。例如：/users/1/categories/5

我遇到了一点 Rails-101 问题，无法找出服务器告诉我路由不存在的原因。

参数正确。该路线存在于 Routes.rb 中。我唯一能想到的是路线出现的顺序。或者可能是由于路由的 SPA 特性。

Routes.rb:

Rails.application.routes.draw do


  ACCEPTS_JSON = lambda {|request|
    request.accepts.include?(:json)
  }

  get "/users/email" => "users#id"
  get "/items/:id/like" => "items#checkhasliked"
  get "/users/:u_id/categories/:c_id " => "users#categoryitems" // should do the trick?

  scope constraints: ACCEPTS_JSON do
    resources :users
    resources :categories
    resources :items
  end

  get "/*path" => "app#main"

  post "/users" => "users#create"
  post "/items" => "items#create"

  post "/items/:id/like" => "items#like"

  post "/items/:id/unlike" => "items#unlike"

  post "/sessions" => "sessions#create"

  root 'app#main'
end

用户控制器：

    class UsersController < ApplicationController

        ...

        def categoryitems
            render json: {head: :ok}
        end
    end

ajax 调用：

fetchCategoryItems: function(cID){
    var uID = this.props.params.id   // user ID
    var cID = cID   // category ID 

    $.ajax({
        type: "GET",
        url: "/users/" + uID + "/categories/" + cID,
        dataType: 'json',
        success: function(data){
            this.setState({didFetchData: 'true', items: data.items})
        }.bind(this),
        error: function(data){
            alert("error! couldn't fetch user's items-by-category")
        }
    })
}

【问题讨论】：

标签： ruby-on-rails routes

【解决方案1】：

我会在你的路由文件中使用它

  resources :users, only: [:show] do
     resources :categories, only: [:show], to:  'users#categoryitems'
  end

【讨论】：