Question

我正在为每个railscasts第154集构建一个多态评论系统。我似乎无法获得接受正确字段的强参数。在POST操作中，参数如下所示：

{"utf8"=>"✓",
 "authenticity_token"=>"/yVWatJSRY1AmAqgbS4Z9S8kIlfQAKBbUeHc/5coxeM=",
 "comment"=>{"content"=>"Hello"},
 "commit"=>"Create Comment",
 "user_id"=>"1"}

我的MVC我将在下面发布。有没有人知道在这种情况下使用强参数的正确方法？

型号：

class Link < ActiveRecord::Base

    has_many :votes
    belongs_to :user
    has_many :comments, as: :commentable   
end

class Comment < ActiveRecord::Base
    belongs_to :commentable, polymorphic: true
end

控制器

class CommentsController < ApplicationController
  before_action :load_commentable

  def index
    @comments = @commentable.comments
  end

  def new
    @comment = @commentable.comments.new
  end

  def create
    @comment = @commentable.comments.new(params.require(:comment [:content]))
    if @comment.save
        redirect_to [@commentable, :comments], notice: "Comment created."
    else
        render :new
    end
end


  def load_commentable
    resource, id = request.path.split('/')[1,2]
    @commentable = resource.singularize.classify.constantize.find(id)
end
end

查看

<h1>New Comment</h1>


<%= form_for [@commentable, @comment] do |f| %>
<% if @comment.errors.any? %>
<div class="error_messages">

    <h2>Please correct the following errors.</h2>
    <ul><% @comment.errors.full_messages.each do |msg| %>
        <li><%= msg %>
            <% end %>
    </ul>
</div>
<% end %>

<div class="field" >
<%= f.text_area :content, rows: 8 %>
</div>

<div class="actions">
    <%= f.submit %>
</div>
<% end %>

Answer 1

就强大的障碍而言，它应该与任何其他控制器不同。

确实

 @comment = @commentable.comments.new(params.require(:comment).permit(:content))

不行吗？

具有多态关联的强参数

1 个答案: