我有一个嵌套的模型设置,用户有多个制造商,制造商有多条线.当我尝试从行索引中删除该行的实例时,我得到一条错误的路由消息.我不确定我做错了什么,但它可能很简单,希望有人可以在这里省点我的心痛.我已经阅读了hartl的东西,我对嵌套资源和路由仍然非常新.
===模型===
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :manufacturers
end
======
class Manufacturer < ActiveRecord::Base belongs_to :user has_many :lines end
======
class Line < ActiveRecord::Base belongs_to :manufacturer end
======
lines_controller.rb
class LinesController < ApplicationController
before_action :set_line, only: [:show, :edit, :update, :destroy]
before_filter :load_manufacturer
# GET /lines
# GET /lines.json
def index
@lines = Line.all
end
# GET /lines/1
# GET /lines/1.json
def show
end
# GET /lines/new
def new
@manufacturer = Manufacturer.find(params[:manufacturer_id])
@line = @manufacturer.lines.build
end
# GET /lines/1/edit
def edit
end
# POST /lines
# POST /lines.json
def create
@line = @manufacturer.lines.build(line_params)
respond_to do |format|
if @line.save
format.html { redirect_to manufacturer_line_path(@manufacturer, @line), notice: 'Line was successfully created.' }
format.json { render action: 'show', status: :created, location: @line }
else
format.html { render action: 'new' }
format.json { render json: @line.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /lines/1
# PATCH/PUT /lines/1.json
def update
respond_to do |format|
if @line.update(line_params)
format.html { redirect_to manufacturer_line_path(@manufacturer, @line), notice: 'Line was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @line.errors, status: :unprocessable_entity }
end
end
end
# DELETE /lines/1
# DELETE /lines/1.json
def destroy
@manufacturer.line.destroy
respond_to do |format|
format.html { redirect_to lines_url }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_line
@line = Line.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def line_params
params.require(:line).permit(:name, :manufacturer_id)
end
def load_manufacturer
@manufacturer = Manufacturer.find(params[:manufacturer_id])
end
end
=====
Prefix Verb URI Pattern Controller#Action
manufacturer_lines GET /manufacturers/:manufacturer_id/lines(.:format) lines#index
POST /manufacturers/:manufacturer_id/lines(.:format) lines#create
new_manufacturer_line GET /manufacturers/:manufacturer_id/lines/new(.:format) lines#new
edit_manufacturer_line GET /manufacturers/:manufacturer_id/lines/:id/edit(.:format) lines#edit
manufacturer_line GET /manufacturers/:manufacturer_id/lines/:id(.:format) lines#show
PATCH /manufacturers/:manufacturer_id/lines/:id(.:format) lines#update
PUT /manufacturers/:manufacturer_id/lines/:id(.:format) lines#update
DELETE /manufacturers/:manufacturer_id/lines/:id(.:format) lines#destroy
manufacturers GET /manufacturers(.:format) manufacturers#index
POST /manufacturers(.:format) manufacturers#create
new_manufacturer GET /manufacturers/new(.:format) manufacturers#new
edit_manufacturer GET /manufacturers/:id/edit(.:format) manufacturers#edit
manufacturer GET /manufacturers/:id(.:format) manufacturers#show
PATCH /manufacturers/:id(.:format) manufacturers#update
PUT /manufacturers/:id(.:format) manufacturers#update
DELETE /manufacturers/:id(.:format) manufacturers#destroy
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) devise/sessions#destroy
user_password POST /users/password(.:format) devise/passwords#create
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
PATCH /users/password(.:format) devise/passwords#update
PUT /users/password(.:format) devise/passwords#update
cancel_user_registration GET /users/cancel(.:format) devise/registrations#cancel
user_registration POST /users(.:format) devise/registrations#create
new_user_registration GET /users/sign_up(.:format) devise/registrations#new
edit_user_registration GET /users/edit(.:format) devise/registrations#edit
PATCH /users(.:format) devise/registrations#update
PUT /users(.:format) devise/registrations#update
DELETE /users(.:format) devise/registrations#destroy
root GET / pages#home
about GET /about(.:format) pages#about
GET /users/:id(.:format) users#show
all_users GET /users(.:format) users#index
public_profile GET /users/:name(.:format) users#show
======
应用程序/视图/线/ index.html.erb
Listing lines
| Name | Manufacturer | |||
|---|---|---|---|---|
| <%= line.name %> | <%= line.manufacturer_id %> | <%= link_to 'Show', manufacturer_lines_path(line.manufacturer, line) %> | <%= link_to 'Edit', edit_manufacturer_line_path(line.manufacturer, line) %> | <%= link_to 'Destroy', manufacturer_lines_path, method: :delete, data: { confirm: 'Are you sure?' } %> |
Ryan Bigg.. 13
这是试图使用错误的路由助手:
<%= link_to 'Destroy', manufacturer_lines_path, method: :delete, data: { confirm: 'Are you sure?' } %>
它应该是:
<%= link_to 'Destroy', manufacturer_line_path(line.manufacturer, line), method: :delete, data: { confirm: 'Are you sure?' } %>
什么manufacturer_lines_path是做使用路由帮手产生,如路径是/manufacturers/1/lines,这是完全有效的.什么是不合法的是,这个环节作出DELETE该路由请求,如果你在你的样子rake routes输出,你会看到,你不必为这个路线.你可能只有一个GET和另一个POST,但不是DELETE.
因此,解决方案是使用正确的路径助手,manufacturer_line_path它接受一个Manufacturer对象和一个Line对象,并从中生成一个路径,如/manufacturers/1/lines/2.再次,查看输出rake routes,您将看到为此路径定义了几个路由.A GET,a PUT,a PATCH和a DELETE.
这最后的路线是怎么回事进行匹配,当你做出一个DELETE /manufacturers/1/lines/2请求,你的应用程序的路由器将路由到LinesController的destroy动作,传递manufacturer_id=1和id=2在参数.
这是试图使用错误的路由助手:
<%= link_to 'Destroy', manufacturer_lines_path, method: :delete, data: { confirm: 'Are you sure?' } %>
它应该是:
<%= link_to 'Destroy', manufacturer_line_path(line.manufacturer, line), method: :delete, data: { confirm: 'Are you sure?' } %>
什么manufacturer_lines_path是做使用路由帮手产生,如路径是/manufacturers/1/lines,这是完全有效的.什么是不合法的是,这个环节作出DELETE该路由请求,如果你在你的样子rake routes输出,你会看到,你不必为这个路线.你可能只有一个GET和另一个POST,但不是DELETE.
因此,解决方案是使用正确的路径助手,manufacturer_line_path它接受一个Manufacturer对象和一个Line对象,并从中生成一个路径,如/manufacturers/1/lines/2.再次,查看输出rake routes,您将看到为此路径定义了几个路由.A GET,a PUT,a PATCH和a DELETE.
这最后的路线是怎么回事进行匹配,当你做出一个DELETE /manufacturers/1/lines/2请求,你的应用程序的路由器将路由到LinesController的destroy动作,传递manufacturer_id=1和id=2在参数.
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