题目申请说明内容较长时，会导致被申请者收不到消息

app/models/course_message.rb

@@ -15,7 +15,7 @@ class CourseMessage < ActiveRecord::Base
   validates :course_id,presence: true
   validates :course_message_id,presence: true
   validates :course_message_type, presence: true
-  validates_length_of :content, :maximum => 100
+  #validates_length_of :content, :maximum => 100
   after_create :add_user_message
 
   def add_user_message

app/views/users/_apply_homework.html.erb

@@ -1,27 +1,16 @@
 <div>
   <div class="ni_con">
+    <%= form_tag(apply_for_homework_user_path(:id=>User.current.id,:homework_id=>homework.id), :multipart => true,:remote => true,:name=>"apply_for_homework_form",:id=>'apply_for_homework_form') do %>
         <h2>请求分享</h2>
         <p>
           请求说明（可选）：
-      <textarea type="text" id="apply_content" class="apply_content mt10" style="outline:none;"></textarea>
+          <textarea type="text" name="content" id="apply_content" class="apply_content mt10" style="outline:none;"></textarea>
         </p>
         <div class="ni_btn">
-      <a href="javascript:" class="tijiao" onclick="apply_to();" style="margin-bottom: 20px; margin-left: 60px; color: #fff">
+          <a href="javascript:" class="tijiao" onclick="$('#apply_for_homework_form').submit();" style="margin-bottom: 20px; margin-left: 60px; color: #fff">
             确&nbsp;&nbsp;定
           </a>
         </div>
+    <% end %>
   </div>
 </div>
-<script>
-  function apply_to() {
-      url = '/users/<%=User.current.id %>/apply_for_homework?homework_id=<%=homework.id %>&content='+$("#apply_content").val();
-      $.get(
-              url,
-              {
-
-              },
-              function (data) {
-              }
-      );
-  }
-</script>

config/routes.rb

@@ -516,7 +516,7 @@ RedmineApp::Application.routes.draw do
       match 'user_project_activities', :to => 'users#user_project_activities', :via => :get
       match 'user_feedback4show', :to => 'users#user_feedback4show', :via => :get
       match 'user_visitorlist', :to => 'users#user_visitorlist', :via => :get
-      match 'apply_for_homework', :to => 'users#apply_for_homework', :via => :get
+      match 'apply_for_homework', :to => 'users#apply_for_homework', :via => :post
       match 'apply_homework', :to => 'users#apply_homework', :via => :get
       match 'user_homeworks', :to => 'users#user_homeworks', :via => :get
       match 'student_homeworks', :to => 'users#student_homeworks', :via => :get
@@ -583,6 +583,7 @@ RedmineApp::Application.routes.draw do
       get 'user_homework_type'
       get 'user_ref_homework_search'
       get 'show_homework_detail'
+      post 'apply_for_homework'
       # end
     end
     #resources :blogs

db/migrate/20160506104128_change_course_messages_cloumn.rb

@@ -0,0 +1,8 @@
+class ChangeCourseMessagesCloumn < ActiveRecord::Migration
+  def up
+    change_column :course_messages, :content, :text
+  end
+
+  def down
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20160429030819) do
+ActiveRecord::Schema.define(:version => 20160506104128) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false
@@ -485,7 +485,7 @@ ActiveRecord::Schema.define(:version => 20160429030819) do
     t.integer  "viewed"
     t.datetime "created_at",          :null => false
     t.datetime "updated_at",          :null => false
-    t.string   "content"
+    t.text     "content"
     t.integer  "status"
     t.integer  "apply_user_id"
     t.integer  "apply_result"