增加修改昵称功能以及昵称是否重复的判断

app/controllers/my_controller.rb

@@ -54,6 +54,7 @@ class MyController < ApplicationController
       @user.safe_attributes = params[:user]
       @user.pref.attributes = params[:pref]
       @user.pref[:no_self_notified] = (params[:no_self_notified] == '1')
+      @user.login = params[:login]
       unless @user.user_extensions.nil?
         if @user.user_extensions.identity == 2
           @user.firstname = params[:enterprise_name]

app/views/my/account.html.erb

@@ -55,12 +55,17 @@
     <legend onclick="toggleFieldset(this);">
       <%= l(:label_information_plural) %>
     </legend>
-    <div>
-        <span id='name' style='display:none'>
+
+    <!-- 昵称 -->
     <p style="width:630px;padding-left: 26px;">
-            <%= f.text_field :login, :required => true %>
+      <%= f.text_field :login, :required => true, :name => "login"%>
       <span class='font_lighter'><%= l(:label_max_number) %></span>
+      <br/>
     </p>
+
+    <div>
+        <span id='name' style='display:none'>
+
             <p style="width:530px;padding-left: 26px;">
               <%= f.text_field :lastname, :required => true %>
               <span class='font_lighter'><%= l(:field_lastname_eg) %></span>