update

app/controllers/comments_controller.rb

@@ -1,29 +1,63 @@
+#encoding: utf-8
 class CommentsController < ApplicationController
-  
+  before_filter :article, only: [:create, :edit, :update, :destroy]
+  before_filter :require_login
+  before_filter :get_comment, only: [:edit, :update, :destroy]
 
   def create
-    
+    @result = {status: true, message: ''}
+    @comment = @article.comments.new content: params[:article_comment][:content]
+    @comment.user_id = @current_user.id
+    if @comment.save
+      @result[:status] = true
+    else
+      @result[:message] = '发表评论失败'
+    end
+    respond_to do |format|
+      format.js
+    end
   end
 
   def edit
-    
+    respond_to do |format|
+      format.js
+    end
   end
 
   def update
-    
+    @result = {status: false, message: ''}
+    if params[:article_comment].present? && params[:article_comment][:content].present?
+      @comment.content = params[:article_comment][:content]
+      if @comment.save
+        @result[:status] = true
+      else
+        @result[:message] = '编辑评论失败'
+      end
+    end
+    respond_to do |format|
+      format.js
+    end
   end
 
   def destroy
-    
+    @result = {status: false, message: ''}
+    if @comment.destroy
+      @result[:status] = true
+    else
+      @result[:message] = '删除评论失败'
+    end
+    respond_to do |format|
+      format.js
+    end
   end
 
   protected
 
   def article
-    
+    @article = Article.find params[:article_id]
   end
 
   def get_comment
-    
+    @comment = @article.comments.find params[:id]
   end
 end