在 Rails 上使用 Bootstrap 和 Ruby 的博客

Question

我的博客评论系统已经卡住了一段时间。我现在需要你的帮助来解决问题并将我推向正确的方向。我正在使用 Ruby on rails 和 twitter 开源框架引导程序。

show.html.erb：

    <h2>Comments</h2>
 <div id="comments">
         <%= render :partial => @post.comments %>
 </div>

 <%= form_for {@post, Comment.new} do |f| %>
        <p>
                <%= f.label :body, "New comment" %><br/>
                <%= f.text_area :body %>
        </p>
        <p><%= f.submit "Add comment" %></p>
<% end %>

</div>

评论控制器：

class CommentsController < ApplicationController
        def create
                @post = Post.find(params[:post_id])
                @comment = @post.comments.create!(params[:comment])
                redirect_to @post
        end
end

Routes.rb

Blog2::Application.routes.draw do
  resources :posts do
    resources :comments, :only => [:create]
  end

comment.html.erb

<%= div_for comment do %>
        <p>
                <strong>
                        Posted <%= time_ago_in_words(comment.created_at) %> ago
                </strong>
                <br/>
                <%= comment.body %>
        </p>
<% end %>

model/comment.rb

class Comment < ActiveRecord::Base
  belongs_to :post
  attr_accessible :body
end

我的两个 (:body) 符号和 form_for 行在 show.html.erb 中出现错误。

这是我的第一篇博客，我对 RoR 还很陌生，感谢一些帮助 :)

第一个错误：

 SyntaxError in Posts#show

Showing /Users/Jdartland/blog_2/app/views/posts/show.html.erb where line #23 raised:

/Users/Jdartland/blog_2/app/views/posts/show.html.erb:23: syntax error, unexpected '}', expecting tCOLON2 or '[' or '.'
...  form_for {@post, Comment.new} do |f| @output_buffer.safe_c...
...                               ^
/Users/Jdartland/blog_2/app/views/posts/show.html.erb:29: syntax error, unexpected keyword_end, expecting '}'
'); end 
       ^
/Users/Jdartland/blog_2/app/views/posts/show.html.erb:32: syntax error, unexpected keyword_ensure, expecting '}'
/Users/Jdartland/blog_2/app/views/posts/show.html.erb:34: syntax error, unexpected keyword_end, expecting '}'
Extracted source (around line #23):

20:          <%= render :partial => @post.comments %>
21:  </div>
22: 
23:  <%= form_for {@post, Comment.new} do |f| %>
24:         <p>
25:                 <%= f.label :body, "New comment" %><br/>
26:                 <%= f.text_area :body %>
Trace of template inclusion: app/views/posts/show.html.erb

Rails.root: /Users/Jdartland/blog_2

第二次错误

ArgumentError in Posts#show

Showing /Users/Jdartland/blog_2/app/views/posts/show.html.erb where line #23 raised:

wrong number of arguments (1 for 0)
Extracted source (around line #23):

20:          <%= render :partial => @post.comments %>
21:  </div>
22: 
23:  <%= form_for @post, Comment.new do |f| %>
24:         <p>
25:                 <%= f.label :body, "New comment" %><br/>
26:                 <%= f.text_area :body %>
Rails.root: /Users/Jdartland/blog_2

Application Trace | Framework Trace | Full Trace
app/views/posts/show.html.erb:23:in `_app_views_posts_show_html_erb___3910729666325401247_70293324213060'
app/controllers/posts_controller.rb:26:in `show'
Request

Parameters:

{"id"=>"2"}

在听从 zeantsoi 的建议后，我更改了 show.html.erb 和 _comment.html.erb。这是我现在剩下的地方 15/6 22.03 已更新！

更新了 show.html.erb：

<h2>Comments</h2>
 <div id="comments">s
         <%= render :partial => 'posts/comment', :locals => {:comments => @post.comments} %>
         <p>
  </div>
</div>

<%= form_for [@post, Comment.new] do |f| %>
  <p>
                <%= f.label :body, "New comment" %><br/>
                <%= f.text_area :body %>

        <%= f.submit "Add comment" %>
  </p>
<% end %> 

当前错误：

howing /Users/Jdartland/blog_2/app/views/posts/show.html.erb where line #28 raised:

undefined method `body' for #<Comment:0x007f88611a1738>
Extracted source (around line #28):

25: <%= form_for [@post, Comment.new] do |f| %>
26:   <p>
27:                 <%= f.label :body, "New comment" %><br/>
28:                 <%= f.text_area :body %>
29:         
30:         <%= f.submit "Add comment" %>
31:   </p>
Rails.root: /Users/Jdartland/blog_2

Application Trace | Framework Trace | Full Trace
app/views/posts/show.html.erb:28:in `block in _app_views_posts_show_html_erb___3992012847724603598_70111860057680'
app/views/posts/show.html.erb:25:in `_app_views_posts_show_html_erb___3992012847724603598_70111860057680'
app/controllers/posts_controller.rb:26:in `show'

Answer 1

首先，您需要将部分路径传递给您的render :partial，而不是对象：

# app/views/posts/show.html.erb (for a partial located at `app/views/posts/_comments.html.erb`
<%= render :partial => 'posts/comments', :locals => {:comments => @post.comments} %>

# app/views/posts/_comments.html.erb
<% comments.each do |comment| %>
    <%= comment.content %>
<% end %>

其次，为了将您的帖子发送到您的嵌套路由，您需要将您的 form_for 参数括在括号中，而不是花括号：

# app/views/posts/show.html.erb
<%= form_for [@post, Comment.new] do |f| %>

Answer 2

不确定这是否能解决您的所有问题，但在您的情况下，您需要传递这样的数组

 form_for [@post, Comment.new]