当我尝试部署时，我在heroku日志中收到此错误：
2013-12-02T22:09:12.276590+00:00 heroku[web.1]: Starting process with command `bin/rails server -p 40810 -e $RAILS_ENV`
2013-12-02T22:09:17.541445+00:00 app[web.1]: /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1.rc1/lib/rails/railtie/configuration.rb:95:in `method_missing': undefined method `active_record' for #<Rails::Application::Configuration:0x007f307be78120> (NoMethodError)
2013-12-02T22:09:17.541445+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1.rc1/lib/rails/commands.rb:71:in `tap'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from /app/config/application.rb:12:in `<top (required)>'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from /app/config/application.rb:54:in `<class:Application>'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from /app/config/application.rb:13:in `<module:SquashSimulator>'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1.rc1/lib/rails/commands.rb:74:in `block in <top (required)>'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1.rc1/lib/rails/commands.rb:74:in `require'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from bin/rails:4:in `<main>'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1.rc1/lib/rails/commands.rb:71:in `<top (required)>'
2013-12-02T22:09:17.541445+00:00 app[web.1]: from bin/rails:4:in `require'
2013-12-02T22:09:19.271123+00:00 heroku[web.1]: State changed from starting to crashed
2013-12-02T22:09:19.258499+00:00 heroku[web.1]: Process exited with status 1
所以我不知道为什么Heroku不认为我有“Active Record”而且我不知道为什么应用程序崩溃......
有关如何解决的任何想法/建议？
当我尝试在本地运行它（并运行'rails server'）时，我得到了这个：
(in /Users/ME/.rvm/gems/ruby-2.0.0-p247/gems/rails-0.9.5)
rake aborted!
ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead.
/Users/ME/.rvm/gems/ruby-2.0.0-p247/gems/rails-0.9.5/Rakefile:3:in `<top (required)>'
(See full trace by running task with --trace)
我不知道如何实施他们推荐的修复程序......
@Mike，
这是我的宝石文件：
1 source 'https://rubygems.org'
2 ruby "2.0.0"
3 gem 'rails'
4 gem 'pg'
5 gem 'jquery-rails'
6 gem 'haml'
7 gem 'bcrypt-ruby', '~>3.0.0'
8 gem 'nokogiri'
9 gem 'protected_attributes'
10 gem 'sass-rails'
11 gem 'coffee-rails'
12 gem 'uglifier'
13 gem 'rails_12factor'
14
15 group :development, :test do
16 gem 'pry-rails'
17 gem 'pry-debugger'
18 gem 'pry-stack_explorer'
19 gem 'annotate'
20 gem 'quiet_assets'
21 gem 'better_errors'
22 gem 'binding_of_caller'
23 gem 'meta_request'
24 end
我的gemfile.lock：
1 GEM
2 remote: https://rubygems.org/
3 specs:
4 actionmailer (0.6.1)
5 actionpack (>= 0.9.5)
6 actionpack (4.0.1.rc1)
7 activesupport (= 4.0.1.rc1)
8 builder (~> 3.1.0)
9 erubis (~> 2.7.0)
10 rack (~> 1.5.2)
11 rack-test (~> 0.6.2)
12 activemodel (4.0.1.rc1)
13 activesupport (= 4.0.1.rc1)
14 builder (~> 3.1.0)
15 activerecord (1.6.0)
16 activesupport (4.0.1.rc1)
17 i18n (~> 0.6, >= 0.6.4)
18 minitest (~> 4.2)
19 multi_json (~> 1.3)
20 thread_safe (~> 0.1)
21 tzinfo (~> 0.3.37)
22 annotate (2.5.0)
23 rake
24 atomic (1.1.14)
25 bcrypt-ruby (3.0.1)
26 better_errors (1.0.1)
27 coderay (>= 1.0.0)
28 erubis (>= 2.6.6)
29 binding_of_caller (0.7.2)
30 debug_inspector (>= 0.0.1)
31 builder (3.1.4)
32 callsite (0.0.11)
33 coderay (1.0.9)
34 coffee-rails (4.0.0)
35 coffee-script (>= 2.2.0)
36 railties (>= 4.0.0.beta, < 5.0)
37 coffee-script (2.2.0)
38 coffee-script-source
39 execjs
40 coffee-script-source (1.6.3)
41 columnize (0.3.6)
42 debug_inspector (0.0.2)
43 debugger (1.6.2)
44 columnize (>= 0.3.1)
45 debugger-linecache (~> 1.2.0)
46 debugger-ruby_core_source (~> 1.2.3)
47 debugger-linecache (1.2.0)
48 debugger-ruby_core_source (1.2.3)
49 erubis (2.7.0)
50 execjs (2.0.2)
51 haml (4.0.3)
52 tilt
53 hike (1.2.3)
54 i18n (0.6.5)
55 jquery-rails (3.0.4)
56 railties (>= 3.0, < 5.0)
57 thor (>= 0.14, < 2.0)
58 meta_request (0.2.8)
59 callsite
60 rack-contrib
61 railties
62 method_source (0.8.2)
63 mini_portile (0.5.1)
64 minitest (4.7.5)
65 multi_json (1.8.2)
66 nokogiri (1.6.0)
67 mini_portile (~> 0.5.0)
68 pg (0.17.0)
69 protected_attributes (1.0.4)
70 activemodel (>= 4.0.1.rc1, < 5.0)
71 pry (0.9.12.2)
72 coderay (~> 1.0.5)
73 method_source (~> 0.8)
74 slop (~> 3.4)
75 pry-debugger (0.2.2)
76 debugger (~> 1.3)
77 pry (~> 0.9.10)
78 pry-rails (0.3.2)
79 pry (>= 0.9.10)
80 pry-stack_explorer (0.4.9.1)
81 binding_of_caller (>= 0.7)
82 pry (>= 0.9.11)
83 quiet_assets (1.0.2)
84 railties (>= 3.1, < 5.0)
85 rack (1.5.2)
86 rack-contrib (1.1.0)
87 rack (>= 0.9.1)
88 rack-test (0.6.2)
89 rack (>= 1.0)
90 rails (0.9.5)
91 actionmailer (>= 0.6.1)
92 actionpack (>= 1.4.0)
93 activerecord (>= 1.6.0)
94 rake (>= 0.4.15)
95 rails_12factor (0.0.2)
96 rails_serve_static_assets
97 rails_stdout_logging
98 rails_serve_static_assets (0.0.1)
99 rails_stdout_logging (0.0.3)
100 railties (4.0.1.rc1)
101 actionpack (= 4.0.1.rc1)
102 activesupport (= 4.0.1.rc1)
103 rake (>= 0.8.7)
104 thor (>= 0.18.1, < 2.0)
105 rake (10.1.0)
106 sass (3.2.12)
107 sass-rails (4.0.1)
108 railties (>= 4.0.0, < 5.0)
109 sass (>= 3.1.10)
110 sprockets-rails (~> 2.0.0)
111 slop (3.4.6)
112 sprockets (2.10.0)
113 hike (~> 1.2)
114 multi_json (~> 1.0)
115 rack (~> 1.0)
116 tilt (~> 1.1, != 1.3.0)
117 sprockets-rails (2.0.1)
118 actionpack (>= 3.0)
119 activesupport (>= 3.0)
120 sprockets (~> 2.8)
121 thor (0.18.1)
122 thread_safe (0.1.3)
123 atomic
124 tilt (1.4.1)
125 tzinfo (0.3.38)
126 uglifier (2.2.1)
127 execjs (>= 0.3.0)
128 multi_json (~> 1.0, >= 1.0.2)
129
130 PLATFORMS
131 ruby
132
133 DEPENDENCIES
134 annotate
135 bcrypt-ruby (~> 3.0.0)
136 better_errors
137 binding_of_caller
138 coffee-rails
139 haml
140 jquery-rails
141 meta_request
142 nokogiri
143 pg
144 protected_attributes
145 pry-debugger
146 pry-rails
147 pry-stack_explorer
148 quiet_assets
149 rails
150 rails_12factor
151 sass-rails
152 uglifier