評論

Question

評價模型

belongs_to :post 
    validates_presence_of :username 
    validates_presence_of :body 

Post模型

has_many :comments 

posts_controller

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

comments_controler

def create 
@comment = Comment.new(params[:comment]) 
if @comment.save 
    @comments = @comment.post.comments 
    respond_to do |format| 
     format.js 
    end 
else 
    #what to do in here 
end 
end 

個

create.js

$("#comments").html("<%= escape_javascript(render :partial => "comments", :collections => @comments) %>"); 

帖子show.html

<div id="comments"> 
<%= render :partial => "comments", :collection => @comments %> 
</div> 
<div id="comment-form"> 
<%= form_for(@comment, :method => :put, :remote => true) do |f| %> 

<% if @comment.errors.any? %> 
<div id="error_explanation"> 
<% @comment.errors.full_messages.each do |msg| %> 
<%= msg %> 
<% end %> 
</div> 
<% end %> 

<%= f.text_field :username %> 
<%= f.text_area :body %> 
<%= f.hidden_field :post_id, :value => @post.id %> 
<%= f.submit %> 

<% end %> 
</div> 

我想在評論寫的東西是在創建行動comments_controller，這樣我可以無需重新加載頁面顯示的驗證錯誤。任何幫助將不勝感激。如果有另一種解決方案來進行基於Ajax的評論，我還可以更改所有代碼。

Answer 1

你能做到這一點是這樣的：

else 
    respond_to do |format| 
    format.js { 
     render :text => "oops" 
     # or 
     render :partial => "/comments/error_message", :locals => {:comment => @comment} # @comment.errors would contain the validation errors 
    } 
    end 
end