发帖内容验证不通过不会丢失信息了，加上了所有验证

app/controllers/forums_controller.rb

@@ -11,6 +11,42 @@ class ForumsController < ApplicationController
   include SortHelper
 
   PageLimit = 20
+
+  def create_memo
+    @memo = Memo.new(params[:memo])
+    @memo.forum_id = @forum.id
+    @memo.author_id = User.current.id
+
+    @memo.save_attachments(params[:attachments] || (params[:memo] && params[:memo][:uploads]))
+
+    respond_to do |format|
+      if @memo.save
+        format.html { redirect_to (forum_memo_path(@forum, (@memo.parent_id.nil? ? @memo : @memo.parent_id))), notice: "#{l :label_memo_create_succ}" }
+        format.json { render json: @memo, status: :created, location: @memo }
+      else
+        sort_init 'updated_at', 'desc'
+        sort_update 'created_at' => "#{Memo.table_name}.created_at",
+                    'replies' => "#{Memo.table_name}.replies_count",
+                    'updated_at' => "COALESCE (last_replies_memos.created_at, #{Memo.table_name}.created_at)"
+
+        @topic_count = @forum.topics.count
+        @topic_pages = Paginator.new @topic_count, per_page_option, params['page']
+        @memos = @forum.topics.
+                        reorder("#{Memo.table_name}.sticky DESC").
+                        includes(:last_reply).
+                        limit(@topic_pages.per_page).
+                        offset(@topic_pages.offset).
+                        order(sort_clause).
+                        preload(:author, {:last_reply => :author}).
+                        all
+
+        flash.now[:error] = "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}"
+        # back_error_page = @memo.parent_id.nil? ? forum_path(@forum) : forum_memo_path(@forum, @memo.parent_id)
+        format.html { render action: :show, layout: 'base_forums' }#, error: "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}" }
+        format.json { render json: @memo.errors, status: :unprocessable_entity }
+      end
+    end
+  end
   
   def index
     @offset, @limit = api_offset_and_limit({:limit => 10})

app/controllers/memos_controller.rb

@@ -47,7 +47,30 @@ class MemosController < ApplicationController
       else
         flash[:error] = "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}"
         # back_error_page = @memo.parent_id.nil? ? forum_path(@forum) : forum_memo_path(@forum, @memo.parent_id)
-        format.html { redirect_to back_memo_or_forum_url}#, error: "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}" }
+        pre_count = REPLIES_PER_PAGE
+
+        @memo_new = @memo.dup
+        @memo = @memo.root # 取出楼主，防止输入帖子id让回复作为主贴显示
+        @memo.update_column(:viewed_count, (@memo.viewed_count.to_i + 1))
+
+        page = params[:page]
+        if params[:r] && page.nil?
+          offset = @memo.children.where("#{Memo.table_name}.id < ?", params[:r].to_i).count
+          page = 1 + offset / pre_count
+        else
+          
+        end
+        @reply_count = @memo.children.count
+        @reply_pages = Paginator.new @reply_count, pre_count, page
+        @replies = @memo.children.
+                    includes(:author, :attachments).
+                    reorder("#{Memo.table_name}.created_at ASC").
+                    limit(@reply_pages.per_page).
+                    offset(@reply_pages.offset).
+                    all
+
+        format.html { render action: :show }#, error: "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}" }
+        # format.html { redirect_to back_memo_or_forum_url}#, error: "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}" }
         format.json { render json: @memo.errors, status: :unprocessable_entity }
       end
     end
@@ -76,7 +99,7 @@ class MemosController < ApplicationController
                 offset(@reply_pages.offset).
                 all
 
-    @mome_new = Memo.new
+    @memo_new = Memo.new
 
 
     # @memo = Memo.find_by_id(params[:id])

app/models/memo.rb

@@ -4,9 +4,10 @@ class Memo < ActiveRecord::Base
 	belongs_to :author, :class_name => "User", :foreign_key => 'author_id' 
 
 	validates_presence_of :author_id, :forum_id, :subject
-	#validates :content, presence: true
+	# 若是主题帖，则内容可以是空
+	validates :content, presence: true, if: Proc.new{|o| !o.parent_id.nil? }
 	validates_length_of :subject, maximum: 50
-	#validates_length_of :content, maximum: 3072
+	validates_length_of :content, maximum: 3072
 	validate :cannot_reply_to_locked_topic, :on => :create
 
 	acts_as_tree :counter_cache => :replies_count, :order => "#{Memo.table_name}.created_at ASC"

app/views/forums/show.html.erb

@@ -2,7 +2,7 @@
 <div id="add-memo" class='lz' style="display: none; padding: 20px;">
 	<h3><%=l(:label_memo_new)%></h3>
 	<% if User.current.logged? %>
-	<%= labelled_form_for(@memo, :url => forum_memos_path(@forum), :html => {:multipart => true} ) do |f|  %>
+	<%= labelled_form_for(@memo, :url => create_memo_forum_path(@forum), :html => {:multipart => true} ) do |f|  %>
 	<% if @memo.errors.any? %>
 		<div id="error_explanation">
 			<h2><%= pluralize(@memo.errors.count, "error") %> prohibited this memo from being saved:</h2>

app/views/memos/_reply_box.html.erb

@@ -1,4 +1,4 @@
-<%= form_for(@mome_new, url: forum_memos_path, :html => {:multipart => true}) do |f| %>
+<%= form_for(@memo_new, url: forum_memos_path, :html => {:multipart => true}) do |f| %>
 		<%= f.hidden_field :subject, :required => true, value: @memo.subject %>
 		<%= f.hidden_field :forum_id, :required => true, value: @memo.forum_id %>
 		<%= f.hidden_field :parent_id, :required => true, value: @memo.id %>

config/routes.rb

@@ -27,6 +27,7 @@ RedmineApp::Application.routes.draw do
       match 'search_forum', :via => [:get, :post]
     end
     member do
+      post 'create_memo'
       match 'search_memo', :via => [:get, :post]
     end
     resources :memos do