Ruby on rails 在我的应用程序中添加注释时出现路由错误

我已经完成了Michael Hartl的《Ruby on教程》一书，现在我尝试向MicroPost添加评论，但当我尝试发布评论时，我出现了一个错误：

No route matches [POST]

我找不到哪里出了问题

我还想知道我的模型之间的关联是否正确？（我想在帖子上创建类似Facebook的评论）

财务主任评论

class CommentsController < ApplicationController
  before_action :logged_in_user, only: [:create, :destroy]
  before_action :correct_user,   only: :destroy

  def create
    user = User.find_by(params[:id])
    micropost = user.microposts.build(params[:micropost])

    @comment = Comment.new(params[:comment])
    @comment.micropost_id = micropost_id
    @comment.user = current_user

    if @comment.save
      flash[:success] = "Comment created!"
      redirect_to root_url
    else
      render 'static_pages/home'
    end
  end
end

---

您可以将的

表单更改为

<%= form_for([micropost, micropost.comments.build]) do |f| %>

这是如何创建的示例
我希望这对您有所帮助
这似乎过于复杂了。创建嵌套资源的方法很简单，如下所示：

<%= form_for([micropost, micropost.comments.build]) do |f| %>

在Rails中嵌套资源路由时，不应使用
member do
member
和
collection
用于向标准CRUD谓词之外的资源添加其他方法<代码>浅层：true

意味着rails不会嵌套作用于单个资源的“单独”路由，如show、edit、destroy

然后，我们清理控制器：

class CommentsController < ApplicationController

  before_action :set_micropost, only: [:index, :new, :create]

  # POST /microposts/:micropost_id/comments
  def create
    @comment = @micropost.comments.build(comment_params) do |c|
      c.user = current_user
    end

    if @micropost.save
      # ...
    else
      # ...
    end
  end

  def comment_params
    params.require(:comment).permit(:comment_comment, :picture)
  end

  def set_micropost
    @micropost = Micropost.find(params[:micropost_id])
  end
end

class CommentsController

谢谢@max的回答。我试过你的答案，但现在我在_comment.html.erb中遇到另一个问题，系统无法找到“

”检查你的

模式.rb

，如果你的

comments

表有

comment

列。否则，您可以通过

railsgmigration AddCommentToComments comment:text

创建一个，然后运行

rake db:migrate

。我会使用其他名称，因为

comment.comment

像

comment.body

或者甚至

comment.text

。感谢您的链接@Muhamad Akbar Bin Wida。。。那我就试试，我会回到你身边。

class CreateComments < ActiveRecord::Migration
  def change
    create_table :comments do |t|
      t.text :comment
      t.references :user, index: true, foreign_key: true
      t.references :micropost, index: true, foreign_key: true
      t.timestamps null: false
    end
    add_index :comments, [:user_id, :micropost_id, :created_at]
  end
end

class Comment < ActiveRecord::Base
  belongs_to :user
  belongs_to :micropost
end

class Micropost < ActiveRecord::Base
  belongs_to :user
  has_many :comments
end

class User < ActiveRecord::Base
  has_many :microposts, dependent: :destroy
  has_many :comments
end

resources :microposts, only: [:create, :destroy] do
  member do
    resources :comments, only: [:create, :destroy] 
  end
end

<%= form_for([micropost, micropost.comments.build]) do |f| %>

<%= form_for(@comment, :url => micropost_comments_path(micropost.id)) do |f| %>

resources :microposts, only: [:create, :destroy] do
  resources :comments, only: [:create, :destroy]
end

<%= form_for([micropost, micropost.comments.build]) do |f| %>

resources :microposts, shallow: true, only: [:create, :destroy] do
  resources :comments, only: [:create, :destroy]
end

class CommentsController < ApplicationController

  before_action :set_micropost, only: [:index, :new, :create]

  # POST /microposts/:micropost_id/comments
  def create
    @comment = @micropost.comments.build(comment_params) do |c|
      c.user = current_user
    end

    if @micropost.save
      # ...
    else
      # ...
    end
  end

  def comment_params
    params.require(:comment).permit(:comment_comment, :picture)
  end

  def set_micropost
    @micropost = Micropost.find(params[:micropost_id])
  end
end