Question

我正在尝试使用rails创建一个简单的博客5.我的应用程序有一个帖子，用户，类别和评论模型。一切正常，但我不能让它工作编辑和销毁评论的行动。
这是虔诚的控制者

comments_controller.rb

Class CommentsController < ApplicationController

def new
    @comment=Comment.new
    @post=Post.find(params[:post_id])
end

def create
    @post=Post.find(params[:post_id])
    @comment=Comment.new(params.require(:comment).permit(:body))
    @comment.user_id=current_user.id
    @comment.post_id=@post.id
    if @comment.save
        redirect_to(post_path(@post))
    else
        render('new')
    end
end


def edit
    @post=Post.find(params[:post_id])
end

def update

end

def destroy
    @post=Post.where(id: params[:post_id])
    @comment=Comment.where(post_id: params[:post_id],id: params[:id] )
    @comment.destroy(params[:post_id])
    redirect_to(post_path(@post))
end
end

posts_controller.rb

 class PostsController < ApplicationController
 before_action(:post_find,only: [:show,:edit,:update,:destroy]) 
 before_action(:authenticate_user!,except: [:index,:show])
 before_action(:owner?,only: [:edit,:update,:destroy])
 before_action(:find_categories,only: [:new,:create,:edit,:update])
 def index
    if params[:category].blank?
        @posts=Post.all
    else
        @category_id=Category.find_by(name: params[:category]).id
        @posts=Post.all.where(category_id: "#{@category_id}").order("created_at DESC")
    end
end

def new
    @post=Post.new
end

def create
    @post=Post.new(post_params)
    @post.user_id=current_user.id
    @post.category_id=params[:category_id]
    if @post.save
        redirect_to(root_path)
    else
        render('new')
    end
end

def show
end

def edit
end

def update
    @post.category_id=params[:category_id]
    if @post.update(post_params)
        redirect_to(post_path(@post))
    else
        render('edit')
    end
end

def destroy
    @post.destroy
    redirect_to(posts_path)
end

private
    def post_params
        params.require(:post).permit(:title,:body,:category,:category_id)
    end

    def post_find
        @post=Post.find(params[:id])
    end

    def owner?
        if user_signed_in?
            if @post.user.id!=current_user.id
                redirect_to(root_path)
            end
        end
    end

    def find_categories
        @categories=Category.all.map{|c| [c.name,c.id]}
    end
end

posts / show.html.erb（重要部分）

<h4>
Comments 
<% if user_signed_in? %>
    | <%= link_to("New comment",new_post_comment_path(@post)) %>
<% end %>
</h4>
<ul>
<% @post.comments.each do |f| %>
    <li> 
        <%= f.body %> | 
        by <%= f.user.email %> |
        <%= link_to("Delete",post_comment_path(f),method: :delete) %> 
    </li>
<% end %>
</ul>

任何想法我做错了什么？

Answer 1

您正在传递comment_id代替post_id而您没有在 post_comment_path 链接中传递post_id。

尝试更改link_to 删除操作，如下所示：

<%= link_to("Delete",post_comment_path(@post, f),method: :delete) %>

并且，由于您已经删除了评论，请从destroy函数中删除params[:post_id]，如下所示：

def destroy
    @post = Post.find(params[:post_id])
    @comment = @post.comments.find(params[:id])
    @comment.destroy
    redirect_to(post_path(@post))
end

详细了解路由和网址助手：http://guides.rubyonrails.org/routing.html#creating-paths-and-urls-from-objects

Answer 2

将nested_scaffold gen用于另一个测试应用...从那里你可以了解嵌套资源。

link_to destroy不对嵌套资源起作用的操作

2 个答案: