另一个禁止的属性错误 - 找不到我哪里出错了

Question

Rails 的新手。自学。标题几乎概括了我正在构建您的基本博客应用程序并正在开发评论功能。使用了三个不同的表：用户、Post、评论以及每个表之间的标准关联。代码示例如下...

评论控制器

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

def create
   @post = Post.find(params[:post_id])
   @comment = @post.comments.new(params[:comment]) #throwing the attributes error here
   @user = current_user
    if @comment.save
        redirect_to root_path
    else
        render 'new'
    end
end

private

  def comment_params
    params.require(:comment).permit(:user_id, :post_id, :content)
  end

评论_form.html.erb

<%= form_for @comment, :url => post_comments_path(@post) do |f| %>
  <% if @comment.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@comment.errors.count, "error") %> prohibited this post from being saved:</h2>

      <ul>
      <% @comment.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>
  <div class="field-content">
    <%= f.label :content %><br>
    <%= f.text_area :content, size: "60x5" %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

路线

Rails.application.routes.draw do
  root                      'visitors#index'
  get           '/about',   to: 'visitors#about'
  get           '/show',    to: 'visitors#show'
  get           '/login',   to: 'sessions#new'
  post          '/login',   to: 'sessions#create'
  get           '/logout',  to: 'sessions#destroy'

  resources         :visitors, only:[:index]
  resources         :posts
  resources         :users

  resources :posts, :shallow => true do 
    resources :comments
  end
end

错误参数

{"utf8"=>"✓",
 "authenticity_token"=>"wLU6Bv7lBoJZQ1chWgY7kRweok7m/KvylO5zWBXtD3JGr2rz2VFumXSswGuf9thn32uBQU3rT84mTOd6sE5KHQ==",
 "comment"=>{"content"=>"THis is a comment"},
 "commit"=>"Create Comment",
 "post_id"=>"5"}

正如我提到的，它是一个禁止属性错误，我知道这与我在下面拥有的强参数有关，但我被严重难住了。我们将很高兴并真诚地感谢您的帮助。

Answer 1

试试下面的代码。

@comment = @post.comments.new(comments_params)

您应该将强参数方法传递给模型中的 new, create or update 方法。

另一个禁止的属性错误 - 找不到我哪里出错了

Yet another forbidden attributes error - cannot find where I am going wrong with this

ruby

ruby-on-rails

strong-parameters