修改加入按钮失败后变为加入课程按钮

app/helpers/watchers_helper.rb

@@ -100,13 +100,12 @@ module WatchersHelper
     return '' if user.id == course.tea_id
     joined = user.member_of_course?(course)
     text = joined ? l(:label_exit_course) : l(:label_new_join)
-    url_t = join_path(:object_id => course.id)
-    url_f = try_join_path(:object_id => course.id)
+    url = joined ? join_path(:object_id => course.id) : try_join_path(:object_id => course.id)
     method = joined ? 'delete' : 'post'
     if joined
-      link_to text, url_t, :remote => true, :method => method, :id => "#{course.id}", :confirm => l(:text_are_you_sure_out), :class => []+options
+      link_to text, url, :remote => true, :method => method, :id => "#{course.id}", :confirm => l(:text_are_you_sure_out), :class => []+options
     else
-      link_to text, url_f, :remote => true, :method => method, :id => "#{course.id}", :class => []+options
+      link_to text, url, :remote => true, :method => method, :id => "#{course.id}", :class => []+options
     end       
   end
 

app/views/courses/_set_join.js.erb

@@ -1,5 +1,5 @@
 <% if object_id%>
-    $("#<%=object_id%>").replaceWith('<%= escape_javascript join_in_course_for_list(course, user) %>');
+    $("#<%=object_id%>").replaceWith('<%= escape_javascript join_in_course(course, user) %>');
 <% end %>
 <% if @state %>
 	<% if @state == 0 %>

config/locales/zh.yml

@@ -1899,7 +1899,7 @@ zh:
     other: 成员
     
   label_bids_task_list: 作业列表
-  label_join_course: 加入课程
+  label_join_course: 加入
   label_exit_course: 退出
   label_new_join: 加入
   label_new_course_password: 课程密码