修改新建topic界面

app/controllers/memos_controller.rb

@@ -22,8 +22,8 @@ class MemosController < ApplicationController
   
   def create
     @memo = Memo.new(params[:memo])
+    @memo.forum_id = params[:forum_id]
     @memo.author_id = User.current.id
-    @back_memo_id = @memo.id
 
     if @memo.parent_id
       @back_memo_id ||= @memo.parent_id
@@ -33,14 +33,11 @@ class MemosController < ApplicationController
 
     respond_to do |format|
       if @memo.save
+        @back_memo_id = @memo.id
         @parent_memo.last_reply_id = @memo.id if @parent_memo
-        if @parent_memo.save
+        @parent_memo.save if @parent_memo
         format.html { redirect_to forum_memo_path(@memo.forum_id, @back_memo_id), notice: 'Memo was successfully created.' }
         format.json { render json: @memo, status: :created, location: @memo }
-        else
-          format.html { redirect_to forum_memo_path(@memo.forum_id, @back_memo_id) }
-          format.json { render json: @memo.errors, status: :unprocessable_entity }
-        end
       else
         format.html { render action: "new" }
         format.json { render json: @memo.errors, status: :unprocessable_entity }

app/views/memos/_topic_form.html.erb

@@ -0,0 +1,18 @@
+<%= labelled_form_for(@memo, :url => forum_memos_path) do |f|  %>
+  <% if @memo.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(@memo.errors.count, "error") %> prohibited this memo from being saved:</h2>
+
+      <ul>
+      <% @memo.errors.full_messages.each do |msg| %>
+        <li><%= msg %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+  <div class="actions">
+    <p><%= f.text_field :subject, :required => true %></p>
+    <p><%= f.text_field :content, :required => true, :size => 80 %></p>
+    <%= f.submit %>
+  </div>
+<% end %>

app/views/memos/new.html.erb

@@ -1,5 +1,5 @@
 <h1>New memo</h1>
 
-<%= render :partial => 'form' %>
+<%= render :partial => 'memos/topic_form' %>
 
 <%= link_to 'Back', forums_path(@forum) %>

db/migrate/20131122132942_create_memos.rb

@@ -6,7 +6,7 @@ class CreateMemos < ActiveRecord::Migration
       t.string :subject, null: false
       t.text :content, null: false
       t.integer :author_id, null: false
-      t.integer :replies_count
+      t.integer :replies_count, default: 0
       t.integer :last_reply_id
       t.boolean :lock, default: false
       t.boolean :sticky, default: false