Ruby on rails Heroku成功部署应用程序，但在浏览器中显示错误页面

当我尝试将我的应用程序部署到Heroku上时，它成功地做到了这一点。但是，当我在浏览器中访问页面时，它显示“我们很抱歉，但出现了一些错误”。我认为这与我作为一个可标记的宝石的行为有关。我已经升级了，但我不知道还能做什么

这是Heroku日志：

-----> Ruby app detected
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-1.9.3
###### WARNING:
       Removing `Gemfile.lock` because it was generated on Windows.
       Bundler will do a full resolve so native gems are handled properly.
       This may result in unexpected gem versions being used in your app.
       In rare occasions Bundler may not be able to resolve your dependencies at all.
       https://devcenter.heroku.com/articles/bundler-windows-gemfile

-----> Installing dependencies using 1.6.3
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4
       Fetching gem metadata from https://rubygems.org/..........
       Resolving dependencies...
       Installing i18n 0.6.11
       Installing rake 10.3.2
       Installing minitest 5.4.2
       Installing thread_safe 0.3.4
       Installing builder 3.2.2
       Installing erubis 2.7.0
       Installing rack 1.5.2
       Installing mime-types 1.25.1
       Installing arel 5.0.1.20140414130214
       Installing polyglot 0.3.5
       Using bundler 1.6.3
       Installing sass 3.2.19
       Installing orm_adapter 0.5.0
       Installing execjs 2.2.2
       Installing coffee-script-source 1.8.0
       Installing hike 1.2.3
       Installing thor 0.19.1
       Installing multi_json 1.10.1
       Installing json 1.8.1
       Installing tilt 1.4.1
       Installing rails_serve_static_assets 0.0.2
       Installing rails_stdout_logging 0.0.3
       Installing tzinfo 1.2.2
       Installing rack-test 0.6.2
       Installing treetop 1.4.15
       Installing bootstrap-sass 3.2.0.2
       Installing coffee-script 2.3.0
       Installing uglifier 2.1.1
       Installing ckeditor 4.1.0
       Installing rdoc 3.12.2
       Installing rails_12factor 0.0.2
       Installing sprockets 2.11.0
       Installing activesupport 4.1.5
       Installing sdoc 0.3.20
       Installing mail 2.5.4
       Installing actionview 4.1.5
       Installing climate_control 0.0.3
       Installing activemodel 4.1.5
       Installing pg 0.17.1
       Installing jbuilder 1.0.2
       Installing cocaine 0.5.4
       Installing actionpack 4.1.5
       Installing activerecord 4.1.5
       Installing actionmailer 4.1.5
       Installing paperclip 4.2.0
       Installing sprockets-rails 2.2.0
       Installing railties 4.1.5
       Installing coffee-rails 4.0.1
       Installing jquery-rails 3.0.4
       Installing acts-as-taggable-on 3.4.2
       Installing turbolinks 1.1.1
       Installing sass-rails 4.0.3
       Installing rails 4.1.5
       Your bundle is complete!
       Gems in the groups development and test were not installed.
       It was installed into ./vendor/bundle
       Post-install message from rdoc:
       Depending on your version of ruby, you may need to install ruby rdoc/ri data:
       <= 1.8.6 : unsupported
       = 1.8.7 : gem install rdoc-data; rdoc-data --install
       = 1.9.1 : gem install rdoc-data; rdoc-data --install
       >= 1.9.2 : nothing to do! Yay!
       Post-install message from acts-as-taggable-on:
       When upgrading
       Re-run the migrations generator
       rake acts_as_taggable_on_engine:install:migrations
       It will create any new migrations and skip existing ones
       ##Breaking changes:
       - ActsAsTaggableOn::Tag is not extend with ActsAsTaggableOn::Utils anymore.
       Please use ActsAsTaggableOn::Utils instead
       Bundle completed (27.01s)
       Cleaning up the bundler cache.
       Detected manifest file, assuming assets were compiled locally

###### WARNING:
       Removing `Gemfile.lock` because it was generated on Windows.
       Bundler will do a full resolve so native gems are handled properly.
       This may result in unexpected gem versions being used in your app.
       In rare occasions Bundler may not be able to resolve your dependencies at all.
       https://devcenter.heroku.com/articles/bundler-windows-gemfile

###### WARNING:
       No Procfile detected, using the default web server (webrick)
       https://devcenter.heroku.com/articles/ruby-default-web-server

-----> Discovering process types
       Procfile declares types -> (none)
       Default types for Ruby  -> console, rake, web, worker

-----> Compressing... done, 24.2MB
-----> Launching... done, v6
       http://dry-plains-8197.herokuapp.com/ deployed to Heroku

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您应该能够看到运行heroku日志的确切错误。它输出什么？确保使用heroku运行rake db:migrate迁移您。如果这不能解决您的问题，那么您应该检查日志，使用命令heroku logs-t实时跟踪日志