Rails and ancestry - 表格提交'parent_id'空

我跟着Railscast episode #262祖先教程。但是，当我提交表单，铁轨服务器日志说parent_id是空的：Rails and ancestry - 表格提交'parent_id'空

rails server日志：

Started POST "/posts/1/comments" for 127.0.0.1 at 2013-09-26 16:14:59 +0200 
Processing by CommentsController#create as HTML 
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"9+9U/etsazbrJxwWah/eRD9v3fKBnjpy+y5s+g7N/Bw=", "comment"=>{"parent_id"=>"", "author"=>"some name", "author_email"=>"[email protected]", "author_url"=>"", "content"=>"banane"}, "commit"=>"Post Comment", "post_id"=>"1"} 
    Post Load (0.1ms) SELECT "posts".* FROM "posts" WHERE "posts"."id" = ? LIMIT 1 [["id", "1"]] 
    (0.1ms) begin transaction 
    SQL (0.4ms) INSERT INTO "comments" ("author", "author_email", "author_url", "content", "created_at", "post_id", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?) [["author", "some name"], ["author_email", "[email protected]"], ["author_url", ""], ["content", "banane"], ["created_at", Thu, 26 Sep 2013 14:14:59 UTC +00:00], ["post_id", 1], ["updated_at", Thu, 26 Sep 2013 14:14:59 UTC +00:00]] 
    (38.6ms) commit transaction 
    (0.1ms) begin transaction 
    (0.1ms) commit transaction 
Redirected to http://0.0.0.0:3000/posts/1 
Completed 302 Found in 49ms (ActiveRecord: 39.4ms)

comments_controller.rb：

def new 
    @comment = Comment.new 
    @comment.parent_id=params[:parent_id] 
end 

def create 
    @post = Post.find(params[:post_id])  
    @comment = @post.comments.create(params[:comment].permit(:author, :author_email, :author_url, :content, :parent_id)) 

    respond_to do |format| 
    if @comment.save 
     stuff 
    else 
     other stuff 
    end 
    end 
end 

def comment_params 
    params.require(:comment).permit(...some stuff..., :parent_id) 
end

comment.rb：

class Comment < ActiveRecord::Base 
    belongs_to :post 
    has_ancestry 
end

post.rb：

class Post < ActiveRecord::Base 
    belongs_to :user 
    has_many :comments, :dependent => :destroy 
    accepts_nested_attributes_for :comments 
end

views/posts/show.html.erb：

<% @post.comments.each do |comment| %> 
    <%= show some stuff %> 
    <%= link_to (post_path(:anchor => "respond", :parent_id => comment)) do%> 
    <%= "Reply"%> 
    <% end %> 
<% end %> 
<%= render 'comments/comment_form'%>

_comment_form.html.erb：

<%= form_for [@post, @post.comments.build], html: { :id => "commentform"} do |f| %> 
<%= f.hidden_field :parent_id %> 
<%= some fields %> 
<%= f.submit "Post Comment"%>

Rails的调试信息：

--- !ruby/hash:ActionController::Parameters 
parent_id: '17' 
action: show 
controller: posts 
id: '1'

我想有些事情错了我的创建方法CommentsController，但我无法弄清楚缺少的东西。所以，我得到了这个工作。我从我的posts/show视图提交表单，所以我必须在后控制器的show动作中调用@comment = Comment.new(:parent_id => params[:parent_id])。

来源

2013-09-26 beo

这行看起来有点不可思议 - 这里的'comment'变量是什么？ '<％= link_to（post_path（：anchor =>“respond”，：parent_id => comment））do％>' – dax

我在views/posts/show.html.erb中添加了一些行。我认为链接工作正常：“0.0.0.0:3000/posts/1?parent_id=18#respond”我看到不同的评论id不同的 – beo

你如何在你的新行动中获得params [：parent_id]？看来这没有被正确设置。 – BroiSatse

如果您使用Rails> 3.0.0试试这个在您的意见控制器：中

@comment = Comment.new 
@comment.parent_id=params[:parent_id]

代替

@comment = Comment.new(:parent_id => params[:parent_id])

来源

2013-11-28 15:23:02 YvonC

添加:parent_id到comment_params在评论控制器。

来源

2014-06-09 20:25:56 pipator

Rails and ancestry - 表格提交'parent_id'空

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