我正在尝试在heroku中安装ruby脚本。当我尝试将其部署到heroku时，我运行bundle install，rake db:create，rake db:migrate会导致错误，
以下是错误：
Counting objects: 858, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (366/366), done.
Writing objects: 100% (858/858), 1.27 MiB | 158.00 KiB/s, done.
Total 858 (delta 434), reused 858 (delta 434)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.3.4
remote: ###### WARNING:
remote: Removing `Gemfile.lock` because it was generated on Windows.
remote: Bundler will do a full resolve so native gems are handled properly.
remote: This may result in unexpected gem versions being used in your app.
remote: In rare occasions Bundler may not be able to resolve your dependencies at all.
remote: https://devcenter.heroku.com/articles/bundler-windows-gemfile
remote:
remote: -----> Installing dependencies using bundler 1.15.2
remote: Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4
remote: The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
remote: Fetching gem metadata from https://rubygems.org/..........
remote: Fetching version metadata from https://rubygems.org/..
remote: Fetching dependency metadata from https://rubygems.org/.
remote: Resolving dependencies...
remote: Fetching rake 12.3.0
remote: Fetching concurrent-ruby 1.0.5
remote: Fetching minitest 5.11.3
remote: Installing rake 12.3.0
remote: Installing minitest 5.11.3
remote: Installing concurrent-ruby 1.0.5
remote: Fetching thread_safe 0.3.6
remote: Fetching builder 3.2.3
remote: Installing thread_safe 0.3.6
remote: Installing builder 3.2.3
remote: Fetching erubis 2.7.0
remote: Fetching mini_portile2 2.3.0
remote: Fetching crass 1.0.3
remote: Installing erubis 2.7.0
remote: Installing mini_portile2 2.3.0
remote: Installing crass 1.0.3
remote: Fetching rack 2.0.4
remote: Fetching nio4r 2.2.0
remote: Installing rack 2.0.4
remote: Installing nio4r 2.2.0 with native extensions
remote: Fetching websocket-extensions 0.1.3
remote: Fetching mini_mime 1.0.0
remote: Installing websocket-extensions 0.1.3
remote: Fetching coffee-script-source 1.12.2
remote: Installing mini_mime 1.0.0
remote: Installing coffee-script-source 1.12.2
remote: Fetching execjs 2.7.0
remote: Installing execjs 2.7.0
remote: Fetching method_source 0.9.0
remote: Fetching thor 0.20.0
remote: Installing thor 0.20.0
remote: Installing method_source 0.9.0
remote: Fetching formtastic_i18n 0.6.0
remote: Installing formtastic_i18n 0.6.0
remote: Fetching kaminari-core 1.1.1
remote: Fetching arel 7.1.4
remote: Installing kaminari-core 1.1.1
remote: Installing arel 7.1.4
remote: Fetching rb-fsevent 0.10.2
remote: Fetching ffi 1.9.21
remote: Installing rb-fsevent 0.10.2
remote: Fetching bcrypt 3.1.11
remote: Installing bcrypt 3.1.11 with native extensions
remote: Installing ffi 1.9.21 with native extensions
remote: Using bundler 1.15.2
remote: Fetching orm_adapter 0.5.0
remote: Installing orm_adapter 0.5.0
remote: Fetching multi_json 1.13.1
remote: Installing multi_json 1.13.1
remote: Fetching nested_scaffold 1.0.0
remote: Installing nested_scaffold 1.0.0
remote: Fetching pg 1.0.0
remote: Installing pg 1.0.0 with native extensions
remote: Fetching puma 3.11.2
remote: Installing puma 3.11.2 with native extensions
remote: Fetching tilt 2.0.8
remote: Installing tilt 2.0.8
remote: Fetching turbolinks-source 5.1.0
remote: Installing turbolinks-source 5.1.0
remote: Fetching will_paginate 3.1.6
remote: Installing will_paginate 3.1.6
remote: Fetching i18n 0.9.5
remote: Installing i18n 0.9.5
remote: Fetching tzinfo 1.2.5
remote: Installing tzinfo 1.2.5
remote: Fetching nokogiri 1.8.2
remote: Installing nokogiri 1.8.2 with native extensions
remote: Fetching rack-test 0.6.3
remote: Installing rack-test 0.6.3
remote: Fetching sprockets 3.7.1
remote: Installing sprockets 3.7.1
remote: Fetching warden 1.2.7
remote: Installing warden 1.2.7
remote: Fetching websocket-driver 0.6.5
remote: Installing websocket-driver 0.6.5 with native extensions
remote: Fetching mail 2.7.0
remote: Installing mail 2.7.0
remote: Fetching coffee-script 2.4.1
remote: Installing coffee-script 2.4.1
remote: Fetching autoprefixer-rails 8.0.0
remote: Installing autoprefixer-rails 8.0.0
remote: Fetching uglifier 4.1.6
remote: Installing uglifier 4.1.6
remote: Fetching rb-inotify 0.9.10
remote: Installing rb-inotify 0.9.10
remote: Fetching turbolinks 5.1.0
remote: Installing turbolinks 5.1.0
remote: Fetching activesupport 5.0.6
remote: Installing activesupport 5.0.6
remote: Fetching sass-listen 4.0.0
remote: Installing sass-listen 4.0.0
remote: Fetching globalid 0.4.1
remote: Installing globalid 0.4.1
remote: Fetching arbre 1.1.1
remote: Installing arbre 1.1.1
remote: Fetching activemodel 5.0.6
remote: Installing activemodel 5.0.6
remote: Fetching jbuilder 2.7.0
remote: Installing jbuilder 2.7.0
remote: Fetching sass 3.5.5
remote: Installing sass 3.5.5
remote: Fetching activejob 5.0.6
remote: Installing activejob 5.0.6
remote: Fetching activerecord 5.0.6
remote: Installing activerecord 5.0.6
remote: Fetching bootstrap-sass 3.3.7
remote: Installing bootstrap-sass 3.3.7
remote: Fetching kaminari-activerecord 1.1.1
remote: Installing kaminari-activerecord 1.1.1
remote: Fetching polyamorous 1.3.3
remote: Installing polyamorous 1.3.3
remote: Fetching rails-dom-testing 2.0.3
remote: Fetching loofah 2.2.0
remote: Installing rails-dom-testing 2.0.3
remote: Installing loofah 2.2.0
remote: Fetching rails-html-sanitizer 1.0.3
remote: Installing rails-html-sanitizer 1.0.3
remote: Fetching actionview 5.0.6
remote: Installing actionview 5.0.6
remote: Fetching kaminari-actionview 1.1.1
remote: Fetching actionpack 5.0.6
remote: Installing kaminari-actionview 1.1.1
remote: Fetching kaminari 1.1.1
remote: Installing actionpack 5.0.6
remote: Installing kaminari 1.1.1
remote: Fetching actioncable 5.0.6
remote: Fetching actionmailer 5.0.6
remote: Fetching railties 5.0.6
remote: Installing actionmailer 5.0.6
remote: Installing actioncable 5.0.6
remote: Fetching formtastic 3.1.5
remote: Installing railties 5.0.6
remote: Fetching has_scope 0.7.1
remote: Installing formtastic 3.1.5
remote: Installing has_scope 0.7.1
remote: Fetching ransack 1.8.7
remote: Installing ransack 1.8.7
remote: Fetching sprockets-rails 3.2.1
remote: Installing sprockets-rails 3.2.1
remote: Fetching simple_form 3.5.1
remote: Installing simple_form 3.5.1
remote: Fetching coffee-rails 4.2.2
remote: Fetching responders 2.4.0
remote: Installing coffee-rails 4.2.2
remote: Installing responders 2.4.0
remote: Fetching jquery-rails 4.3.1
remote: Fetching rails 5.0.6
remote: Installing rails 5.0.6
remote: Fetching sass-rails 5.0.7
remote: Installing sass-rails 5.0.7
remote: Fetching inherited_resources 1.8.0
remote: Fetching devise 4.4.1
remote: Installing inherited_resources 1.8.0
remote: Installing jquery-rails 4.3.1
remote: Installing devise 4.4.1
remote: Fetching activeadmin 1.2.1
remote: Installing activeadmin 1.2.1
remote: Bundle complete! 18 Gemfile dependencies, 79 gems now installed.
remote: Gems in the groups development and test were not installed.
remote: Bundled gems are installed into ./vendor/bundle.
remote: Bundle completed (30.42s)
remote: Cleaning up the bundler cache.
remote: -----> Installing node-v6.11.1-linux-x64
remote: -----> Detecting rake tasks
remote: -----> Preparing app for Rails asset pipeline
remote: Running: rake assets:precompile
remote: DEPRECATION WARNING: `config.static_cache_control` is deprecated and will be removed in Rails 5.1.
remote: Please use
remote: `config.public_file_server.headers = { 'Cache-Control' => 'public, max-age=2592000' }`
remote: instead.
remote: (called from block in <top (required)> at /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/config/environments/production.rb:28)
remote: intializing git
remote: rake aborted!
remote: Gem::LoadError: Specified 'postgresql' for database adapter, but the gem is not loaded. Add `gem 'pg'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.6/lib/active_record/connection_adapters/connection_specification.rb:176:in `rescue in spec'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.6/lib/active_record/connection_adapters/connection_specification.rb:173:in `spec'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.6/lib/active_record/connection_handling.rb:53:in `establish_connection'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.6/lib/active_record/railtie.rb:125:in `block (2 levels) in <class:Railtie>'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/lazy_load_hooks.rb:69:in `instance_eval'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/lazy_load_hooks.rb:60:in `with_execution_control'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/lazy_load_hooks.rb:65:in `execute_hook'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/lazy_load_hooks.rb:50:in `block in run_load_hooks'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/lazy_load_hooks.rb:49:in `each'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/lazy_load_hooks.rb:49:in `run_load_hooks'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/devise-4.4.1/lib/devise/mapping.rb:78:in `modules'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/devise-4.4.1/lib/devise/mapping.rb:95:in `routes'
remote:
/tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/railties-5.0.6/lib/rails/initializable.rb:55:in `block in run_initializers'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/railties-5.0.6/lib/rails/initializable.rb:54:in `run_initializers'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/railties-5.0.6/lib/rails/application.rb:352:in `initialize!'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/config/environment.rb:5:in `<top (required)>'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:293:in `require'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:293:in `block in require'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:259:in `load_dependency'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:293:in `require'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/railties-5.0.6/lib/rails/application.rb:328:in `require_environment!'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/railties-5.0.6/lib/rails/application.rb:448:in `block in run_tasks_blocks'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:62:in `block (2 levels) in define'
remote: /tmp/build_95d492fa8732a678c298a47e2e3bb8e4/vendor/bundle/ruby/2.3.0/gems/rake-12.3.0/exe/rake:27:in `<top (required)>'
remote: Tasks: TOP => environment
remote: (See full trace by running task with --trace)
remote: !
remote: ! Precompiling assets failed.
remote: !
remote: ! Push rejected, failed to compile Ruby app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to limitless-hamlet-95451.
remote:
To https://git.heroku.com/limitless-hamlet-95451.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/limitless-hamlet-95451.git
” 在localhost中，它运行顺畅..
答案 0 :(得分：3)
使用
创建rails 5应用程序时rails new app-name -d postgresql
默认情况下，它会将postgres gem（pg）设置为0.21。
当您启动项目时，您可能已跳过此步骤，并在后续阶段添加了pg。让我们回顾一下。
rails new without-db #defaults to sqlite3
cd without-db
然后我编辑了我的Gemfile替换
gem 'sqlite3'
到
gem 'pg'
然后
bundle install
现在，postgres gem版本是1.0.0。编辑了我的database.yml连接凭据。然后生成模型，迁移，控制器等的一些东西并将它们推送到heroku。
$ rails g scaffold book title:string author:string genre:string description:string
...
$ rake db:create
...
$ rake db:migrate
...
$ heroku login
...
$ git init
...
$ heroku git:remote -a without-db-sample
...
$ git add .
...
$ git commit -m "initial commit"
...
$ git push heroku master
...
$ heroku run rake db:migrate
...
$ heroku open
虽然我不喜欢这个版本的pg，但它能正常工作。
然后再次编辑Gemfile，替换，
gem 'pg'
到
gem 'pg', '~> 0.18'
然后
$ bundle install
...
$ bundle show pg
/home/ziya/.rvm/gems/ruby-2.4.1/gems/pg-0.21.0
$ git status
...
$ git add .
...
$ git commit -m "change postgres version"
...
$ git push heroku master
答案 1 :(得分：0)
https://github.com/rails/rails/issues/31673
这似乎是一个铁路问题。我会尝试使用gem "pg", "0.21.1"