diff --git a/app/helpers/main_helper.rb b/app/helpers/main_helper.rb
index f7708db..6a720a3 100644
--- a/app/helpers/main_helper.rb
+++ b/app/helpers/main_helper.rb
@@ -81,6 +81,9 @@ module MainHelper
 
   def joinded_activity(micropost_id,name)
     engage_people, engage_people_names = get_engaged_people micropost_id
+    if engage_people_names.nil?
+      return false
+    end
     engage_people_names = engage_people_names.split(',')
     return engage_people_names.include?(name)
   end
diff --git a/db/development.sqlite3 b/db/development.sqlite3
index cc6acc6..2b0068d 100644
Binary files a/db/development.sqlite3 and b/db/development.sqlite3 differ
diff --git a/herokulog.txt b/herokulog.txt
new file mode 100644
index 0000000..cad7a37
--- /dev/null
+++ b/herokulog.txt
@@ -0,0 +1,101 @@
+2016-12-27T14:26:30.434989+00:00 app[web.1]: I, [2016-12-27T14:26:30.434940 #4]  INFO -- : [bab85abb-1e49-4592-a08e-17e303e12337]   Rendered layouts/_refer.html.erb (0.0ms)
+2016-12-27T14:26:30.435224+00:00 app[web.1]: I, [2016-12-27T14:26:30.435180 #4]  INFO -- : [bab85abb-1e49-4592-a08e-17e303e12337] Completed 200 OK in 84ms (Views: 3.7ms | ActiveRecord: 3.2ms)
+2016-12-27T14:26:30.437771+00:00 heroku[router]: at=info method=POST path="/users" host=se-guoren-test.herokuapp.com request_id=bab85abb-1e49-4592-a08e-17e303e12337 fwd="121.195.114.11" dyno=web.1 connect=1ms service=91ms status=200 bytes=8670
+2016-12-27T14:26:30.952100+00:00 heroku[router]: at=info method=GET path="/stylesheets/jquery.fancybox.css" host=se-guoren-test.herokuapp.com request_id=0372c738-9a6f-4b5d-a68b-3ee8b70ef463 fwd="121.195.114.11" dyno=web.1 connect=1ms service=1ms status=304 bytes=48
+2016-12-27T14:26:43.970062+00:00 heroku[router]: at=info method=POST path="/users" host=se-guoren-test.herokuapp.com request_id=54f81ac3-fc75-47c7-8073-e8a0fe4aabeb fwd="121.195.114.11" dyno=web.1 connect=1ms service=88ms status=302 bytes=828
+2016-12-27T14:26:43.886254+00:00 app[web.1]: I, [2016-12-27T14:26:43.886205 #4]  INFO -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb] Processing by UsersController#create as HTML
+2016-12-27T14:26:43.885608+00:00 app[web.1]: I, [2016-12-27T14:26:43.885530 #4]  INFO -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb] Started POST "/users" for 121.195.114.11 at 2016-12-27 14:26:43 +0000
+2016-12-27T14:26:43.886317+00:00 app[web.1]: I, [2016-12-27T14:26:43.886276 #4]  INFO -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb]   Parameters: {"utf8"=>"✓", "authenticity_token"=>"icK/M7hdBHuCBWyWPM3N6Rw2RjeZrxQHPwwc6GTvdZnKOmYM8GstjCvGhbey5je6TZOa/EJQzSSMgMz8izhGfg==", "user"=>{"name"=>"张大于", "email"=>"zxy@ucas.com", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "commit"=>"注册"}
+2016-12-27T14:26:43.960358+00:00 app[web.1]: D, [2016-12-27T14:26:43.960262 #4] DEBUG -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb]    (0.6ms)  BEGIN
+2016-12-27T14:26:43.962468+00:00 app[web.1]: D, [2016-12-27T14:26:43.962418 #4] DEBUG -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb]   User Exists (0.9ms)  SELECT  1 AS one FROM "users" WHERE LOWER("users"."name") = LOWER($1) LIMIT $2  [["name", "张大于"], ["LIMIT", 1]]
+2016-12-27T14:26:43.966355+00:00 app[web.1]: D, [2016-12-27T14:26:43.966304 #4] DEBUG -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb]   SQL (0.9ms)  INSERT INTO "users" ("name", "email", "picurl", "created_at", "updated_at", "password_digest") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"  [["name", "张大于"], ["email", "zxy@ucas.com"], ["picurl", "images/avatars/default/avatar.png"], ["created_at", 2016-12-27 14:26:43 UTC], ["updated_at", 2016-12-27 14:26:43 UTC], ["password_digest", "$2a$10$NbxhrvZAJnin7CynJIpWWu7lFpR2wqZaG6e7UPpwMMfpIRPpoQUvi"]]
+2016-12-27T14:26:43.963732+00:00 app[web.1]: D, [2016-12-27T14:26:43.963669 #4] DEBUG -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb]   User Exists (0.8ms)  SELECT  1 AS one FROM "users" WHERE "users"."email" = $1 LIMIT $2  [["email", "zxy@ucas.com"], ["LIMIT", 1]]
+2016-12-27T14:26:43.968484+00:00 app[web.1]: D, [2016-12-27T14:26:43.968433 #4] DEBUG -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb]    (1.5ms)  COMMIT
+2016-12-27T14:26:43.968946+00:00 app[web.1]: I, [2016-12-27T14:26:43.968897 #4]  INFO -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb] Redirected to http://se-guoren-test.herokuapp.com/main
+2016-12-27T14:26:43.969092+00:00 app[web.1]: I, [2016-12-27T14:26:43.969050 #4]  INFO -- : [54f81ac3-fc75-47c7-8073-e8a0fe4aabeb] Completed 302 Found in 83ms (ActiveRecord: 4.7ms)
+2016-12-27T14:26:44.457630+00:00 app[web.1]: I, [2016-12-27T14:26:44.457541 #4]  INFO -- : [aea6357e-ec23-41ea-aeed-4192484c6e92] Started GET "/main" for 121.195.114.11 at 2016-12-27 14:26:44 +0000
+2016-12-27T14:26:44.459049+00:00 app[web.1]: I, [2016-12-27T14:26:44.458997 #4]  INFO -- : [aea6357e-ec23-41ea-aeed-4192484c6e92] Processing by MainController#show as HTML
+2016-12-27T14:26:44.466723+00:00 app[web.1]: D, [2016-12-27T14:26:44.466667 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   User Load (0.8ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 4], ["LIMIT", 1]]
+2016-12-27T14:26:44.473385+00:00 app[web.1]: D, [2016-12-27T14:26:44.473325 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]    (1.0ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."post_type" IN (1, 2, 3)
+2016-12-27T14:26:44.475919+00:00 app[web.1]: D, [2016-12-27T14:26:44.475869 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   MicroPost Load (1.1ms)  SELECT  "micro_posts".* FROM "micro_posts" WHERE "micro_posts"."post_type" IN (1, 2, 3) ORDER BY "micro_posts"."post_time" DESC LIMIT $1 OFFSET $2  [["LIMIT", 10], ["OFFSET", 0]]
+2016-12-27T14:26:44.497013+00:00 app[web.1]: D, [2016-12-27T14:26:44.496933 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   User Load (1.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 3], ["LIMIT", 1]]
+2016-12-27T14:26:44.499218+00:00 app[web.1]: D, [2016-12-27T14:26:44.499115 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   User Load (0.8ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
+2016-12-27T14:26:44.500171+00:00 app[web.1]: D, [2016-12-27T14:26:44.500121 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
+2016-12-27T14:26:44.502057+00:00 app[web.1]: D, [2016-12-27T14:26:44.502007 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   User Load (0.8ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:26:44.503174+00:00 app[web.1]: D, [2016-12-27T14:26:44.503115 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:26:44.504166+00:00 app[web.1]: D, [2016-12-27T14:26:44.504114 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:26:44.505148+00:00 app[web.1]: D, [2016-12-27T14:26:44.505100 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:26:44.506694+00:00 app[web.1]: I, [2016-12-27T14:26:44.506634 #4]  INFO -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   Rendering main/main.html.erb within layouts/application
+2016-12-27T14:26:44.509447+00:00 app[web.1]: I, [2016-12-27T14:26:44.509384 #4]  INFO -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   Rendered layouts/_nav.html.erb (0.5ms)
+2016-12-27T14:26:44.521463+00:00 app[web.1]: D, [2016-12-27T14:26:44.521398 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]    (1.1ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 7]]
+2016-12-27T14:26:44.523387+00:00 app[web.1]: D, [2016-12-27T14:26:44.523325 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]    (0.8ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 6]]
+2016-12-27T14:26:44.525175+00:00 app[web.1]: D, [2016-12-27T14:26:44.525121 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]    (0.8ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 5]]
+2016-12-27T14:26:44.526840+00:00 app[web.1]: D, [2016-12-27T14:26:44.526785 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]    (0.8ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 4]]
+2016-12-27T14:26:44.527609+00:00 app[web.1]: D, [2016-12-27T14:26:44.527563 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]    (0.6ms)  BEGIN
+2016-12-27T14:26:44.529719+00:00 app[web.1]: D, [2016-12-27T14:26:44.529663 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   MicroPost Load (0.8ms)  SELECT  "micro_posts".* FROM "micro_posts" WHERE "micro_posts"."id" = $1 LIMIT $2 FOR UPDATE  [["id", 4], ["LIMIT", 1]]
+2016-12-27T14:26:44.531628+00:00 app[web.1]: D, [2016-12-27T14:26:44.531560 #4] DEBUG -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]    (1.6ms)  COMMIT
+2016-12-27T14:26:44.532749+00:00 app[web.1]: I, [2016-12-27T14:26:44.532686 #4]  INFO -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   Rendered main/main.html.erb within layouts/application (25.9ms)
+2016-12-27T14:26:44.532962+00:00 app[web.1]: I, [2016-12-27T14:26:44.532910 #4]  INFO -- : [aea6357e-ec23-41ea-aeed-4192484c6e92] Completed 500 Internal Server Error in 74ms (ActiveRecord: 16.0ms)
+2016-12-27T14:26:44.533988+00:00 app[web.1]: F, [2016-12-27T14:26:44.533939 #4] FATAL -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   
+2016-12-27T14:26:44.534039+00:00 app[web.1]: F, [2016-12-27T14:26:44.533991 #4] FATAL -- : [aea6357e-ec23-41ea-aeed-4192484c6e92] ActionView::Template::Error (undefined method `split' for nil:NilClass):
+2016-12-27T14:26:44.534252+00:00 app[web.1]: F, [2016-12-27T14:26:44.534209 #4] FATAL -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]     35:                     <% if micro_post_belong_to_user(micro_post["postid"], @user) == false %>
+2016-12-27T14:26:44.534253+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92]     36:                         <% if micro_post["type"] == "组团信息" %>
+2016-12-27T14:26:44.534254+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92]     37:                             <div class="social-button">
+2016-12-27T14:26:44.534254+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92]     38:                               <% if joinded_activity(micro_post["postid"], @user.name) %>
+2016-12-27T14:26:44.534255+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92]     39:                                   <button class="btn btn-lg btn-success-outline activity">取消报名</button>
+2016-12-27T14:26:44.534255+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92]     40:                                   <div class="activity-detail text-center"></div>
+2016-12-27T14:26:44.534256+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92]     41:                               <% else %>
+2016-12-27T14:26:44.534595+00:00 app[web.1]: F, [2016-12-27T14:26:44.534293 #4] FATAL -- : [aea6357e-ec23-41ea-aeed-4192484c6e92] app/helpers/main_helper.rb:84:in `joinded_activity'
+2016-12-27T14:26:44.534285+00:00 app[web.1]: F, [2016-12-27T14:26:44.534249 #4] FATAL -- : [aea6357e-ec23-41ea-aeed-4192484c6e92]   
+2016-12-27T14:26:44.534597+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92] app/views/main/main.html.erb:38:in `block in _app_views_main_main_html_erb___4319673276589869370_70143703684160'
+2016-12-27T14:26:44.534598+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92] app/views/main/main.html.erb:9:in `each'
+2016-12-27T14:26:44.534598+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92] app/views/main/main.html.erb:9:in `_app_views_main_main_html_erb___4319673276589869370_70143703684160'
+2016-12-27T14:26:44.534599+00:00 app[web.1]: [aea6357e-ec23-41ea-aeed-4192484c6e92] app/controllers/main_controller.rb:20:in `show'
+2016-12-27T14:26:44.535884+00:00 heroku[router]: at=info method=GET path="/main" host=se-guoren-test.herokuapp.com request_id=aea6357e-ec23-41ea-aeed-4192484c6e92 fwd="121.195.114.11" dyno=web.1 connect=1ms service=80ms status=500 bytes=1669
+2016-12-27T14:26:45.223095+00:00 heroku[router]: at=info method=GET path="/favicon.ico" host=se-guoren-test.herokuapp.com request_id=0d25c158-b1da-4546-a322-e48a2230ab61 fwd="121.195.114.11" dyno=web.1 connect=1ms service=2ms status=304 bytes=48
+2016-12-27T14:29:29.932926+00:00 heroku[router]: at=info method=GET path="/" host=se-guoren-test.herokuapp.com request_id=18e46fba-6a36-458f-9843-5dba1ac4b9e5 fwd="121.195.114.11" dyno=web.1 connect=0ms service=7ms status=302 bytes=828
+2016-12-27T14:29:29.930708+00:00 app[web.1]: I, [2016-12-27T14:29:29.930627 #4]  INFO -- : [18e46fba-6a36-458f-9843-5dba1ac4b9e5] Started GET "/" for 121.195.114.11 at 2016-12-27 14:29:29 +0000
+2016-12-27T14:29:29.931476+00:00 app[web.1]: I, [2016-12-27T14:29:29.931414 #4]  INFO -- : [18e46fba-6a36-458f-9843-5dba1ac4b9e5] Processing by LoginController#init as HTML
+2016-12-27T14:29:29.936110+00:00 app[web.1]: I, [2016-12-27T14:29:29.935669 #4]  INFO -- : [18e46fba-6a36-458f-9843-5dba1ac4b9e5] Redirected to http://se-guoren-test.herokuapp.com/main
+2016-12-27T14:29:29.935213+00:00 app[web.1]: D, [2016-12-27T14:29:29.935144 #4] DEBUG -- : [18e46fba-6a36-458f-9843-5dba1ac4b9e5]   User Load (1.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 4], ["LIMIT", 1]]
+2016-12-27T14:29:29.936286+00:00 app[web.1]: I, [2016-12-27T14:29:29.936233 #4]  INFO -- : [18e46fba-6a36-458f-9843-5dba1ac4b9e5] Completed 302 Found in 5ms (ActiveRecord: 1.0ms)
+2016-12-27T14:29:30.436680+00:00 app[web.1]: I, [2016-12-27T14:29:30.436607 #4]  INFO -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] Started GET "/main" for 121.195.114.11 at 2016-12-27 14:29:30 +0000
+2016-12-27T14:29:30.437590+00:00 app[web.1]: I, [2016-12-27T14:29:30.437541 #4]  INFO -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] Processing by MainController#show as HTML
+2016-12-27T14:29:30.440124+00:00 app[web.1]: D, [2016-12-27T14:29:30.440073 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   User Load (1.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 4], ["LIMIT", 1]]
+2016-12-27T14:29:30.443043+00:00 app[web.1]: D, [2016-12-27T14:29:30.442991 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]    (1.1ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."post_type" IN (1, 2, 3)
+2016-12-27T14:29:30.444967+00:00 app[web.1]: D, [2016-12-27T14:29:30.444886 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   MicroPost Load (0.9ms)  SELECT  "micro_posts".* FROM "micro_posts" WHERE "micro_posts"."post_type" IN (1, 2, 3) ORDER BY "micro_posts"."post_time" DESC LIMIT $1 OFFSET $2  [["LIMIT", 10], ["OFFSET", 0]]
+2016-12-27T14:29:30.448145+00:00 app[web.1]: D, [2016-12-27T14:29:30.448090 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   User Load (0.9ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 3], ["LIMIT", 1]]
+2016-12-27T14:29:30.451687+00:00 app[web.1]: D, [2016-12-27T14:29:30.451150 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   User Load (1.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
+2016-12-27T14:29:30.453803+00:00 app[web.1]: D, [2016-12-27T14:29:30.453735 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
+2016-12-27T14:29:30.456533+00:00 app[web.1]: D, [2016-12-27T14:29:30.456469 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   User Load (0.9ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:29:30.458003+00:00 app[web.1]: D, [2016-12-27T14:29:30.457946 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:29:30.459203+00:00 app[web.1]: D, [2016-12-27T14:29:30.459148 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:29:30.460470+00:00 app[web.1]: D, [2016-12-27T14:29:30.460401 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
+2016-12-27T14:29:30.461628+00:00 app[web.1]: I, [2016-12-27T14:29:30.461556 #4]  INFO -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   Rendering main/main.html.erb within layouts/application
+2016-12-27T14:29:30.461986+00:00 app[web.1]: I, [2016-12-27T14:29:30.461928 #4]  INFO -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   Rendered layouts/_nav.html.erb (0.1ms)
+2016-12-27T14:29:30.464536+00:00 app[web.1]: D, [2016-12-27T14:29:30.464473 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]    (0.9ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 7]]
+2016-12-27T14:29:30.466248+00:00 app[web.1]: D, [2016-12-27T14:29:30.466190 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]    (0.8ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 6]]
+2016-12-27T14:29:30.467999+00:00 app[web.1]: D, [2016-12-27T14:29:30.467925 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]    (0.7ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 5]]
+2016-12-27T14:29:30.469758+00:00 app[web.1]: D, [2016-12-27T14:29:30.469701 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]    (0.9ms)  SELECT COUNT(*) FROM "micro_posts" WHERE "micro_posts"."user_id" = $1 AND "micro_posts"."id" = $2  [["user_id", 4], ["id", 4]]
+2016-12-27T14:29:30.474100+00:00 app[web.1]: D, [2016-12-27T14:29:30.474038 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]    (4.1ms)  BEGIN
+2016-12-27T14:29:30.475980+00:00 app[web.1]: D, [2016-12-27T14:29:30.475926 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   MicroPost Load (1.1ms)  SELECT  "micro_posts".* FROM "micro_posts" WHERE "micro_posts"."id" = $1 LIMIT $2 FOR UPDATE  [["id", 4], ["LIMIT", 1]]
+2016-12-27T14:29:30.477880+00:00 app[web.1]: D, [2016-12-27T14:29:30.477830 #4] DEBUG -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]    (1.6ms)  COMMIT
+2016-12-27T14:29:30.479027+00:00 app[web.1]: I, [2016-12-27T14:29:30.478976 #4]  INFO -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   Rendered main/main.html.erb within layouts/application (17.3ms)
+2016-12-27T14:29:30.479182+00:00 app[web.1]: I, [2016-12-27T14:29:30.479139 #4]  INFO -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] Completed 500 Internal Server Error in 41ms (ActiveRecord: 16.1ms)
+2016-12-27T14:29:30.480397+00:00 app[web.1]: F, [2016-12-27T14:29:30.480330 #4] FATAL -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   
+2016-12-27T14:29:30.480471+00:00 app[web.1]: F, [2016-12-27T14:29:30.480409 #4] FATAL -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] ActionView::Template::Error (undefined method `split' for nil:NilClass):
+2016-12-27T14:29:30.481135+00:00 app[web.1]: F, [2016-12-27T14:29:30.481086 #4] FATAL -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]     35:                     <% if micro_post_belong_to_user(micro_post["postid"], @user) == false %>
+2016-12-27T14:29:30.481136+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]     36:                         <% if micro_post["type"] == "组团信息" %>
+2016-12-27T14:29:30.481137+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]     37:                             <div class="social-button">
+2016-12-27T14:29:30.481137+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]     38:                               <% if joinded_activity(micro_post["postid"], @user.name) %>
+2016-12-27T14:29:30.481138+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]     39:                                   <button class="btn btn-lg btn-success-outline activity">取消报名</button>
+2016-12-27T14:29:30.481139+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]     40:                                   <div class="activity-detail text-center"></div>
+2016-12-27T14:29:30.481139+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]     41:                               <% else %>
+2016-12-27T14:29:30.481185+00:00 app[web.1]: F, [2016-12-27T14:29:30.481134 #4] FATAL -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca]   
+2016-12-27T14:29:30.481258+00:00 app[web.1]: F, [2016-12-27T14:29:30.481202 #4] FATAL -- : [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] app/helpers/main_helper.rb:84:in `joinded_activity'
+2016-12-27T14:29:30.481259+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] app/views/main/main.html.erb:38:in `block in _app_views_main_main_html_erb___4319673276589869370_70143703684160'
+2016-12-27T14:29:30.481260+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] app/views/main/main.html.erb:9:in `each'
+2016-12-27T14:29:30.481260+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] app/views/main/main.html.erb:9:in `_app_views_main_main_html_erb___4319673276589869370_70143703684160'
+2016-12-27T14:29:30.481261+00:00 app[web.1]: [eae3fb5a-320d-4195-90cf-49a09fc7b6ca] app/controllers/main_controller.rb:20:in `show'
+2016-12-27T14:29:30.477775+00:00 heroku[router]: at=info method=GET path="/main" host=se-guoren-test.herokuapp.com request_id=eae3fb5a-320d-4195-90cf-49a09fc7b6ca fwd="121.195.114.11" dyno=web.1 connect=0ms service=47ms status=500 bytes=1669
+2016-12-27T14:29:31.399894+00:00 heroku[router]: at=info method=GET path="/favicon.ico" host=se-guoren-test.herokuapp.com request_id=b29e3681-6702-4e54-812e-f17760fa4d4a fwd="121.195.114.11" dyno=web.1 connect=0ms service=3ms status=304 bytes=48