Crud 操作"Delete"在我的第一个 Ruby on rail 项目中不起作用

Question

我在我的第一个项目中实现了crud操作"delete"，但系统将该命令视为"get"，出现错误。

这是控制器：

class MoviesController < ApplicationController
def index
    @movies = Movie.all      
end
#GET /movies/:id
def show
    id = params[:id]
    @movie = Movie.find(id)
    #render plain: 'show'+params[:id]
end
#POST /movies/
# skip_before_action :verify_autenticity_token:
def create
    @movie = Movie.create!(params[:movie].permit(:title, :rating, :description, :realease_date))
    flash[:notice] = "#{@movie.title} was successfully created."
    redirect_to movies_path
end
#new
def new
end
def edit
  id = params[:id]
    @movie = Movie.find(id)
end
def update
  id = params[:id]
  @movie = Movie.find(id)
  if @movie.update_attributes!(params[:movie].permit(:title,:rating,:realease_date))   
   flash[:notice] = "#{@movie.title} has been edited."
   redirect_to movies_path
  end
end
def destroy
  id = params[:id]
  @movie = Movie.find(id)
  @movie.destroy
  flash[:notice] = "#{@movie.title} has been deleted."
  redirect_to movies_path
end

end

这是可以调用"删除"操作的视图：

%h2 Details about #{@movie.title}
%ul#details
    %li
        Rating:
        = @movie.rating
    %li
        Released on:
        = @movie.realease_date#.strftime("%B %d, %Y")
%h3 Description:
%p#description= @movie.description
%h4 Reviews:
- if @movie.reviews.empty?
    %p
        No reviews for this movie...
-else 
    - @movie.reviews.each do |r|
        - u = Moviegoer.find(r.moviegoer_id)
        <b>#{r.vote}</b> (<i>#{Moviegoer.find(r.moviegoer_id).name}</i>) #{r.message} <br />

= link_to 'Add review', new_movie_review_path(@movie)
<br/><br/>

#{link_to 'Edit info', edit_movie_path(@movie)} - #{link_to 'Delete', movie_path(@movie), :method => :delete} - #{link_to 'Back to movie list', movies_path}

问题可能出在最后一行，因为在服务器命令行中"删除"不是调用。这是服务器响应(是我在浏览器上按"删除"时执行的最后一个 GET(：

在此处输入图像描述

文件路由.rb：

Rails.application.routes.draw do
resources :movies do
    resources :reviews, only: [:new, :create, :destroy]
end
resources :moviegoers
root :to  => redirect('/movies')
end

命令"耙子路由"的结果：

Prefix Verb   URI Pattern                                                                              Controller#Action
        movie_reviews POST   /movies/:movie_id/reviews(.:format)                                                      reviews#create
     new_movie_review GET    /movies/:movie_id/reviews/new(.:format)                                                  reviews#new
         movie_review DELETE /movies/:movie_id/reviews/:id(.:format)                                                  reviews#destroy
               movies GET    /movies(.:format)                                                                        movies#index
                      POST   /movies(.:format)                                                                        movies#create
            new_movie GET    /movies/new(.:format)                                                                    movies#new
           edit_movie GET    /movies/:id/edit(.:format)                                                               movies#edit
                movie GET    /movies/:id(.:format)                                                                    movies#show
                      PATCH  /movies/:id(.:format)                                                                    movies#update
                      PUT    /movies/:id(.:format)                                                                    movies#update
                      DELETE /movies/:id(.:format)                                                                    movies#destroy
           moviegoers GET    /moviegoers(.:format)                                                                    moviegoers#index
                      POST   /moviegoers(.:format)                                                                    moviegoers#create
        new_moviegoer GET    /moviegoers/new(.:format)                                                                moviegoers#new
       edit_moviegoer GET    /moviegoers/:id/edit(.:format)                                                           moviegoers#edit
            moviegoer GET    /moviegoers/:id(.:format)                                                                moviegoers#show
                      PATCH  /moviegoers/:id(.:format)                                                                moviegoers#update
                      PUT    /moviegoers/:id(.:format)                                                                moviegoers#update
                      DELETE /moviegoers/:id(.:format)                                                                moviegoers#destroy
                 root GET    /                                                                                        redirect(301, /movies)
   rails_service_blob GET    /rails/active_storage/blobs/:signed_id             /*filename(.:format)                               active_storage/blobs#show
rails_blob_representation GET    /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format)    active_storage/representations#show
      rails_disk_service GET    /rails/active_storage/disk/:encoded_key/*filename(.:format)                              active_storage/disk#show
 update_rails_disk_service PUT    /rails/active_storage/disk/:encoded_token(.:format)                                         active_storage/disk#update
      rails_direct_uploads POST   /rails/active_storage /direct_uploads(.:format)                                            active_storage/direct_uploads#create

Answer 1

如果不看到相应的路线，很难确切地说出发生了什么。您可以尝试运行rake routes以查看可用的路由。

根据控制器中的注释，我猜您可能必须执行诸如复数路径link_to 'Delete', movies_path(id: @movie.id), method: :delete之类的操作，但这只有在资源路由配置错误时才可以解决问题。

为了使链接按配置方式工作，路由文件必须包含resources :movies，或者必须包含专门配置的路由以映射到删除操作。