Ruby on Rails，推送到 Heroku 时出错 - 数据库问题？答案

【问题标题】：Ruby on Rails, error when pushing to Heroku - database issue?Ruby on Rails，推送到 Heroku 时出错 - 数据库问题？
【发布时间】：2014-05-21 01:53:29
【问题描述】：

我是 Ruby on Rails 的新手，一般来说也是编程新手，所以我无法阅读此日志并理解问题所在。我刚刚在 Rails 中创建了一个简单的应用程序，并试图将其推送到 Heroku。我了解 sqlite 和 Heroku 存在问题，因此我将 gem 文件更改为：

 source 'https://rubygems.org'


    gem 'rails', '4.0.2'
    gem 'sass-rails', '~> 4.0.0'
    gem 'uglifier', '>= 1.3.0'
    gem 'coffee-rails', '~> 4.0.0'
    gem 'jquery-rails'
    gem 'turbolinks'
    gem 'jbuilder', '~> 1.2'
    gem 'bootstrap-sass'

    group :development, :test do
    gem 'sqlite3'
    end

    group :production do
    gem 'pg'
    gem 'rails_12factor'
    end

group :doc do  
gem 'sdoc', require: false
end

然后我运行了 bundle install -- 没有生产。然后我通过命令行将它推送到 git 和 heroku。它似乎有效，但是当我转到 heroku 创建的页面时，我收到以下消息：应用程序错误应用程序发生错误，无法提供您的页面。请稍后再试。

如果您是应用程序所有者，请查看您的日志以了解详细信息。

然后我运行了 heroku logs --tail 并收到了这条消息。

我不知道是什么导致了问题。我只有大约两天的时间开始使用编程或 Rails，所以这很令人困惑。谢谢。

    $ git push heroku master
Warning: Permanently added the RSA host key for IP address '50.19.85.154' to the
 list of known hosts.
Enter passphrase for key '/c/Users/Lisa/.ssh/id_rsa':
Fetching repository, done.
To git@heroku.com:tranquil-earth-2932.git
 ! [rejected]        master -> master (non-fast-forward)
error: failed to push some refs to 'git@heroku.com:tranquil-earth-2932.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.

Lisa@LISA-HP /c/users/lisa/desktop/pinteresting (master)
$ heroku logs --tail
←[36m2014-05-20T22:11:18.020685+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `require'
←[36m2014-05-20T22:11:18.020763+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `block in require'
←[36m2014-05-20T22:11:18.020724+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `block (2 levels) in
require'
←[36m2014-05-20T22:11:18.020782+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `each'
←[36m2014-05-20T22:11:18.020801+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `require'
←[36m2014-05-20T22:11:18.020528+00:00 app[web.1]:←[0m /app/vendor/bundle/ruby/2.
0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `require': canno
t load such file -- less-rails (LoadError)
←[36m2014-05-20T22:11:18.020578+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `register
_rails_engine'
←[36m2014-05-20T22:11:18.020953+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
←[36m2014-05-20T22:11:18.020608+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:6:in `load!'
←[36m2014-05-20T22:11:18.020840+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler.rb:131:in `require'
←[36m2014-05-20T22:11:18.020859+00:00 app[web.1]:←[0m   from /app/config/applica
tion.rb:7:in `<top (required)>'
←[36m2014-05-20T22:11:18.020897+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `block in <top (requi
red)>'
←[36m2014-05-20T22:11:18.020916+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
←[36m2014-05-20T22:11:18.020878+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `require'
←[36m2014-05-20T22:11:18.020991+00:00 app[web.1]:←[0m   from bin/rails:4:in `<ma
in>'
←[36m2014-05-20T22:11:18.020973+00:00 app[web.1]:←[0m   from bin/rails:4:in `req
uire'
←[33m2014-05-20T22:11:21.182626+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/ host=tranquil-earth-2932.herokuapp.com request_
id=6b22fce3-ca34-4403-85a4-3ad841ee2d72 fwd="50.143.161.142" dyno= connect= serv
ice= status=503 bytes=
←[33m2014-05-20T22:11:21.409050+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/favicon.ico host=tranquil-earth-2932.herokuapp.c
om request_id=eb61a469-11e0-47b9-bec6-7045bb9e1c1b fwd="50.143.161.142" dyno= co
nnect= service= status=503 bytes=
←[36m2014-05-20T22:11:19.742708+00:00 heroku[web.1]:←[0m State changed from star
ting to crashed
←[36m2014-05-20T22:11:19.735501+00:00 heroku[web.1]:←[0m Process exited with sta
tus 1
←[33m2014-05-20T22:12:40.925333+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/ host=tranquil-earth-2932.herokuapp.com request_
id=cdff1d04-0fb5-471a-b88f-3cc3b450fe27 fwd="50.143.161.142" dyno= connect= serv
ice= status=503 bytes=
←[33m2014-05-20T22:12:41.137018+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/favicon.ico host=tranquil-earth-2932.herokuapp.c
om request_id=15cceead-cbd0-4b89-8111-3e0750e490f5 fwd="50.143.161.142" dyno= co
nnect= service= status=503 bytes=
←[33m2014-05-20T22:41:31.750337+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/ host=tranquil-earth-2932.herokuapp.com request_
id=1bc63ffa-116d-4071-90c2-dfdb232939f4 fwd="50.143.161.142" dyno= connect= serv
ice= status=503 bytes=
←[36m2014-05-20T22:54:59.342657+00:00 heroku[web.1]:←[0m State changed from cras
hed to starting
←[36m2014-05-20T22:55:06.506950+00:00 app[web.1]:←[0m /app/vendor/bundle/ruby/2.
0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `require': canno
t load such file -- less-rails (LoadError)
←[36m2014-05-20T22:55:06.507015+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:6:in `load!'
←[36m2014-05-20T22:55:06.506994+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `register
_rails_engine'
←[36m2014-05-20T22:55:06.507035+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:41:in `<top (re
quired)>'
←[36m2014-05-20T22:55:06.507056+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font-awesome-less.rb:1:in `require'
←[36m2014-05-20T22:55:06.507097+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font-awesome-less.rb:1:in `<top (req
uired)>'
←[36m2014-05-20T22:55:06.507117+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `require'
←[36m2014-05-20T22:55:06.507137+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `block (2 levels) in
require'
←[36m2014-05-20T22:55:06.507157+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `each'
←[36m2014-05-20T22:55:06.507177+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `block in require'
←[36m2014-05-20T22:55:06.507211+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `each'
←[36m2014-05-20T22:55:06.507249+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler.rb:131:in `require'
←[36m2014-05-20T22:55:06.507231+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `require'
←[36m2014-05-20T22:55:06.507268+00:00 app[web.1]:←[0m   from /app/config/applica
tion.rb:7:in `<top (required)>'
←[36m2014-05-20T22:55:06.507286+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `require'
←[36m2014-05-20T22:55:06.507322+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `block in <top (requi
red)>'
←[36m2014-05-20T22:55:06.507341+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
←[36m2014-05-20T22:55:06.507359+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
←[36m2014-05-20T22:55:06.507378+00:00 app[web.1]:←[0m   from bin/rails:4:in `req
uire'
←[36m2014-05-20T22:55:06.507396+00:00 app[web.1]:←[0m   from bin/rails:4:in `<ma
in>'
←[36m2014-05-20T22:55:07.928729+00:00 heroku[web.1]:←[0m State changed from star
ting to crashed
←[36m2014-05-20T22:55:03.863011+00:00 heroku[web.1]:←[0m Starting process with c
ommand `bin/rails server -p 13720 -e production`
←[36m2014-05-20T22:55:07.816698+00:00 heroku[web.1]:←[0m Process exited with sta
tus 1
←[33m2014-05-20T23:06:39.203070+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/ host=tranquil-earth-2932.herokuapp.com request_
id=28c91df1-e7e8-4e69-9657-08c4a37b428c fwd="50.143.161.142" dyno= connect= serv
ice= status=503 bytes=
←[33m2014-05-20T23:06:39.348326+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/favicon.ico host=tranquil-earth-2932.herokuapp.c
om request_id=53206354-ff5c-4f71-86e1-035adf6f2221 fwd="50.143.161.142" dyno= co
nnect= service= status=503 bytes=
←[33m2014-05-20T23:06:43.830039+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/ host=tranquil-earth-2932.herokuapp.com request_
id=de4cf78f-6912-480f-82f7-87c6c6fd66a6 fwd="50.143.161.142" dyno= connect= serv
ice= status=503 bytes=
←[33m2014-05-20T23:06:44.000423+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/favicon.ico host=tranquil-earth-2932.herokuapp.c
om request_id=d9b27929-a7cf-412f-a749-1ea8e75ea8c3 fwd="50.143.161.142" dyno= co
nnect= service= status=503 bytes=
←[36m2014-05-20T23:40:11.750892+00:00 heroku[web.1]:←[0m State changed from cras
hed to starting
←[36m2014-05-20T23:40:16.537318+00:00 app[web.1]:←[0m /app/vendor/bundle/ruby/2.
0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `require': canno
t load such file -- less-rails (LoadError)
←[36m2014-05-20T23:40:16.537362+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `each'
←[36m2014-05-20T23:40:16.537340+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `register
_rails_engine'
←[36m2014-05-20T23:40:16.537365+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `require'
←[36m2014-05-20T23:40:16.537343+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:6:in `load!'
←[36m2014-05-20T23:40:16.537369+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler.rb:131:in `require'
←[36m2014-05-20T23:40:16.537345+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:41:in `<top (re
quired)>'
←[36m2014-05-20T23:40:16.537372+00:00 app[web.1]:←[0m   from /app/config/applica
tion.rb:7:in `<top (required)>'
←[36m2014-05-20T23:40:16.537346+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font-awesome-less.rb:1:in `require'
←[36m2014-05-20T23:40:16.537410+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `require'
←[36m2014-05-20T23:40:16.537348+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font-awesome-less.rb:1:in `<top (req
uired)>'
←[36m2014-05-20T23:40:16.537415+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `block in <top (requi
red)>'
←[36m2014-05-20T23:40:16.537351+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `require'
←[36m2014-05-20T23:40:16.537417+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
←[36m2014-05-20T23:40:16.537353+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `block (2 levels) in
require'
←[36m2014-05-20T23:40:16.537420+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
←[36m2014-05-20T23:40:16.537426+00:00 app[web.1]:←[0m   from bin/rails:4:in `<ma
in>'
←[36m2014-05-20T23:40:16.537355+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `each'
←[36m2014-05-20T23:40:16.537423+00:00 app[web.1]:←[0m   from bin/rails:4:in `req
uire'
←[36m2014-05-20T23:40:16.537358+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `block in require'
←[36m2014-05-20T23:40:17.653829+00:00 heroku[web.1]:←[0m State changed from star
ting to crashed
←[36m2014-05-20T23:40:14.432603+00:00 heroku[web.1]:←[0m Starting process with c
ommand `bin/rails server -p 30369 -e production`
←[36m2014-05-20T23:40:17.640831+00:00 heroku[web.1]:←[0m Process exited with sta
tus 1
←[36m2014-05-21T01:02:44.418153+00:00 heroku[web.1]:←[0m State changed from cras
hed to starting
←[36m2014-05-21T01:02:51.071476+00:00 app[web.1]:←[0m /app/vendor/bundle/ruby/2.
0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `require': canno
t load such file -- less-rails (LoadError)
←[36m2014-05-21T01:02:51.071501+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:6:in `load!'
←[36m2014-05-21T01:02:51.071499+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `register
_rails_engine'
←[36m2014-05-21T01:02:51.071504+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font-awesome-less.rb:1:in `require'
←[36m2014-05-21T01:02:51.071503+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:41:in `<top (re
quired)>'
←[36m2014-05-21T01:02:51.071506+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/font-awesome-less-4.1.0/lib/font-awesome-less.rb:1:in `<top (req
uired)>'
←[36m2014-05-21T01:02:51.071508+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `require'
←[36m2014-05-21T01:02:51.071513+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `each'
←[36m2014-05-21T01:02:51.071518+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `require'
←[36m2014-05-21T01:02:51.071519+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler.rb:131:in `require'
←[36m2014-05-21T01:02:51.071509+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `block (2 levels) in
require'
←[36m2014-05-21T01:02:51.071516+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `each'
←[36m2014-05-21T01:02:51.071515+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `block in require'
←[36m2014-05-21T01:02:51.071521+00:00 app[web.1]:←[0m   from /app/config/applica
tion.rb:7:in `<top (required)>'
←[36m2014-05-21T01:02:51.071528+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
←[36m2014-05-21T01:02:51.071525+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `require'
←[36m2014-05-21T01:02:51.071526+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:74:in `block in <top (requi
red)>'
←[36m2014-05-21T01:02:51.071529+00:00 app[web.1]:←[0m   from /app/vendor/bundle/
ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
←[36m2014-05-21T01:02:51.071531+00:00 app[web.1]:←[0m   from bin/rails:4:in `req
uire'
←[36m2014-05-21T01:02:51.071534+00:00 app[web.1]:←[0m   from bin/rails:4:in `<ma
in>'
←[36m2014-05-21T01:02:52.463039+00:00 heroku[web.1]:←[0m State changed from star
ting to crashed
←[36m2014-05-21T01:02:48.872619+00:00 heroku[web.1]:←[0m Starting process with c
ommand `bin/rails server -p 5886 -e production`
←[36m2014-05-21T01:02:52.444507+00:00 heroku[web.1]:←[0m Process exited with sta
tus 1
←[33m2014-05-21T01:32:39.536275+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/ host=tranquil-earth-2932.herokuapp.com request_
id=8dba47fb-5f6d-4cc4-8c99-cf0733f69306 fwd="50.143.161.142" dyno= connect= serv
ice= status=503 bytes=
←[33m2014-05-21T01:32:39.743826+00:00 heroku[router]:←[0m at=error code=H10 desc
="App crashed" method=GET path=/favicon.ico host=tranquil-earth-2932.herokuapp.c
om request_id=2b9f8656-9258-49cf-b376-ef6b076d58b8 fwd="50.143.161.142" dyno= co
nnect= service= status=503 bytes=

【问题讨论】：

你跑heroku run rake db:migrate了吗？
首先在本地提交所有内容，然后您需要从 heroku 存储库中提取代码。 “git pull heroku master”
那你需要再次提交，然后在heroku上推送更新的代码。
如果它不起作用，则删除 gemfile.lock 并更新一个包，然后将其推送到 heroku

标签： ruby-on-rails ruby sqlite heroku

【解决方案1】：

这行看起来很可疑：

/app/vendor/bundle/ruby/2.
0.0/gems/font-awesome-less-4.1.0/lib/font_awesome/less.rb:33:in `require': canno
t load such file -- less-rails (LoadError)

font-awesome-less 似乎不在您的 gemfile 中，您应该将其添加为依赖项。

gem 'font-awesome-less'

有关使用详情，请参阅this。

顺便说一句，less 和 sass 或多或少是等价的，我可能会选择一个并坚持使用它（font-awesome-less 取决于 less，而您的 gemfile 中已经有 sass-rails）。 font-awesome-rails 是 font-awesome-less 的 sass 等价物。

【讨论】：

不错的发现 - 我没看到这个
我什至没有意识到这可能是个问题。非常感谢您指出这一点！再次感谢，非常感谢。

【解决方案2】：

除了hjing 发布的精彩答案之外，这是阻止您推送到Heroku 的主要错误：

错误：未能将一些引用推送到 'git@heroku.com:tranquil-earth-2932.git' 提示：更新被拒绝因为您当前分支的尖端在提示后面：它的远程对方。集成远程更改（例如提示：'git pull ...'）在再次推动之前。

该错误基本上表明您的remote git repo 领先于本地。为了解决这个问题，如 cmets 中所述，我会：

$ git add .
$ git commit -a -m "Heroku"
$ git pull heroku master # -> this will just merge any of the "ahead" files
$ git add .
$ git commit -a -m "Heroku"
$ git push heroku master

SASS

那么你就需要处理 SASS 错误

要解决此问题，您需要能够使用 font-awesome-less gem 来纠正问题。下面的答案应该对您有所帮助

【讨论】：

哇，谢谢你，我从你的回答中学到了很多。我很感激你的时间。 :)