ruby-on-rails-3 - Bundler每次都安装sqlite3，但是Gemfile里没有sqlite

Question

Bundler 每次都安装 sqlite3，但我没有在我的项目中使用它。我选择了 Postgres，但无法将其部署到 Heroku。 Bundler 就是这样做的原因。为什么？我该怎么办？

我试图为此制作单独的 gem 。我清除并重新安装了所有 gem 。但是每次 sqlite 出现在我的“bundle 安装”日志中时:

.......
Using sqlite3 (1.3.4) 
Using sqlite3-ruby (1.3.3) 
Using taps (0.3.23) 
Using thin (1.2.11) 
Using turn (0.8.2) 
Using uglifier (1.0.3) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.

我的 Gemfile:

source 'http://rubygems.org'

gem 'rails', '3.1.0'

gem "jquery-rails"
gem 'sorcery'
gem 'simple_form'
gem 'cocoon'

gem 'thin'
gem 'heroku'
gem 'taps'
gem 'pg'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails', "  ~> 3.1.0"
  gem 'coffee-rails', "~> 3.1.0"
  gem 'uglifier'
end

group :development do
  gem "cucumber-rails"
  gem "capybara"
  gem "rspec-rails", ">= 2.0.1"
end

group :test do
  gem 'turn', :require => false
  gem "cucumber-rails"
  gem "capybara"
  gem "rspec-rails", ">= 2.0.1"
  gem "database_cleaner"
  gem "factory_girl_rails"
end

请帮忙，怎么了？

更新:
添加了 Gemfile.lock:

GEM
  remote: http://rubygems.org/
  specs:
    actionmailer (3.1.0)
      actionpack (= 3.1.0)
      mail (~> 2.3.0)
    actionpack (3.1.0)
      activemodel (= 3.1.0)
      activesupport (= 3.1.0)
      builder (~> 3.0.0)
      erubis (~> 2.7.0)
      i18n (~> 0.6)
      rack (~> 1.3.2)
      rack-cache (~> 1.0.3)
      rack-mount (~> 0.8.2)
      rack-test (~> 0.6.1)
      sprockets (~> 2.0.0)
    activemodel (3.1.0)
      activesupport (= 3.1.0)
      bcrypt-ruby (~> 3.0.0)
      builder (~> 3.0.0)
      i18n (~> 0.6)
    activerecord (3.1.0)
      activemodel (= 3.1.0)
      activesupport (= 3.1.0)
      arel (~> 2.2.1)
      tzinfo (~> 0.3.29)
    activeresource (3.1.0)
      activemodel (= 3.1.0)
      activesupport (= 3.1.0)
    activesupport (3.1.0)
      multi_json (~> 1.0)
    addressable (2.2.6)
    ansi (1.3.0)
    arel (2.2.1)
    bcrypt-ruby (3.0.1)
    builder (3.0.0)
    capybara (1.1.1)
      mime-types (>= 1.16)
      nokogiri (>= 1.3.3)
      rack (>= 1.0.0)
      rack-test (>= 0.5.4)
      selenium-webdriver (~> 2.0)
      xpath (~> 0.1.4)
    childprocess (0.2.2)
      ffi (~> 1.0.6)
    cocoon (1.0.12)
    coffee-rails (3.1.1)
      coffee-script (>= 2.2.0)
      railties (~> 3.1.0)
    coffee-script (2.2.0)
      coffee-script-source
      execjs
    coffee-script-source (1.1.2)
    cucumber (1.0.6)
      builder (>= 2.1.2)
      diff-lcs (>= 1.1.2)
      gherkin (~> 2.4.18)
      json (>= 1.4.6)
      term-ansicolor (>= 1.0.6)
    cucumber-rails (1.0.5)
      capybara (>= 1.1.1)
      cucumber (~> 1.0.6)
      nokogiri (>= 1.5.0)
    daemons (1.1.4)
    database_cleaner (0.6.7)
    diff-lcs (1.1.3)
    erubis (2.7.0)
    eventmachine (0.12.10)
    execjs (1.2.8)
      multi_json (~> 1.0)
    factory_girl (2.1.2)
      activesupport
    factory_girl_rails (1.2.0)
      factory_girl (~> 2.1.0)
      railties (>= 3.0.0)
    faraday (0.6.1)
      addressable (~> 2.2.4)
      multipart-post (~> 1.1.0)
      rack (< 2, >= 1.1.0)
    ffi (1.0.9)
    gherkin (2.4.21)
      json (>= 1.4.6)
    heroku (2.8.4)
      launchy (>= 0.3.2)
      rest-client (~> 1.6.1)
      rubyzip
      term-ansicolor (~> 1.0.5)
    hike (1.2.1)
    i18n (0.6.0)
    jquery-rails (1.0.14)
      railties (~> 3.0)
      thor (~> 0.14)
    json (1.6.1)
    json_pure (1.6.1)
    launchy (2.0.5)
      addressable (~> 2.2.6)
    mail (2.3.0)
      i18n (>= 0.4.0)
      mime-types (~> 1.16)
      treetop (~> 1.4.8)
    mime-types (1.16)
    multi_json (1.0.3)
    multipart-post (1.1.3)
    nokogiri (1.5.0)
    oauth (0.4.5)
    oauth2 (0.4.1)
      faraday (~> 0.6.1)
      multi_json (>= 0.0.5)
    pg (0.11.0)
    polyglot (0.3.2)
    rack (1.3.3)
    rack-cache (1.0.3)
      rack (>= 0.4)
    rack-mount (0.8.3)
      rack (>= 1.0.0)
    rack-ssl (1.3.2)
      rack
    rack-test (0.6.1)
      rack (>= 1.0)
    rails (3.1.0)
      actionmailer (= 3.1.0)
      actionpack (= 3.1.0)
      activerecord (= 3.1.0)
      activeresource (= 3.1.0)
      activesupport (= 3.1.0)
      bundler (~> 1.0)
      railties (= 3.1.0)
    railties (3.1.0)
      actionpack (= 3.1.0)
      activesupport (= 3.1.0)
      rack-ssl (~> 1.3.2)
      rake (>= 0.8.7)
      rdoc (~> 3.4)
      thor (~> 0.14.6)
    rake (0.9.2)
    rdoc (3.9.4)
    rest-client (1.6.7)
      mime-types (>= 1.16)
    rspec (2.6.0)
      rspec-core (~> 2.6.0)
      rspec-expectations (~> 2.6.0)
      rspec-mocks (~> 2.6.0)
    rspec-core (2.6.4)
    rspec-expectations (2.6.0)
      diff-lcs (~> 1.1.2)
    rspec-mocks (2.6.0)
    rspec-rails (2.6.1)
      actionpack (~> 3.0)
      activesupport (~> 3.0)
      railties (~> 3.0)
      rspec (~> 2.6.0)
    rubyzip (0.9.4)
    sass (3.1.7)
    sass-rails (3.1.2)
      actionpack (~> 3.1.0)
      railties (~> 3.1.0)
      sass (>= 3.1.4)
      sprockets (~> 2.0.0)
      tilt (~> 1.3.2)
    selenium-webdriver (2.7.0)
      childprocess (>= 0.2.1)
      ffi (>= 1.0.7)
      json_pure
      rubyzip
    sequel (3.20.0)
    simple_form (1.5.2)
      actionpack (~> 3.0)
      activemodel (~> 3.0)
    sinatra (1.0)
      rack (>= 1.0)
    sorcery (0.6.1)
      bcrypt-ruby (~> 3.0.0)
      oauth (~> 0.4.4)
      oauth (~> 0.4.4)
      oauth2 (~> 0.4.1)
      oauth2 (~> 0.4.1)
    sprockets (2.0.0)
      hike (~> 1.2)
      rack (~> 1.0)
      tilt (!= 1.3.0, ~> 1.1)
    sqlite3 (1.3.4)
    sqlite3-ruby (1.3.3)
      sqlite3 (>= 1.3.3)
    taps (0.3.23)
      rack (>= 1.0.1)
      rest-client (< 1.7.0, >= 1.4.0)
      sequel (~> 3.20.0)
      sinatra (~> 1.0.0)
      sqlite3-ruby (~> 1.2)
    term-ansicolor (1.0.6)
    thin (1.2.11)
      daemons (>= 1.0.9)
      eventmachine (>= 0.12.6)
      rack (>= 1.0.0)
    thor (0.14.6)
    tilt (1.3.3)
    treetop (1.4.10)
      polyglot
      polyglot (>= 0.3.1)
    turn (0.8.2)
      ansi (>= 1.2.2)
    tzinfo (0.3.29)
    uglifier (1.0.3)
      execjs (>= 0.3.0)
      multi_json (>= 1.0.2)
    xpath (0.1.4)
      nokogiri (~> 1.3)

PLATFORMS
  ruby

DEPENDENCIES
  capybara
  cocoon
  coffee-rails (~> 3.1.0)
  cucumber-rails
  database_cleaner
  factory_girl_rails
  heroku
  jquery-rails
  pg
  rails (= 3.1.0)
  rspec-rails (>= 2.0.1)
  sass-rails (~> 3.1.0)
  simple_form
  sorcery
  taps
  thin
  turn
  uglifier

Answer 1

(即使你已经弄明白了，我还是把它放在这里以防由于某些原因人们不阅读评论)

您在 Gemfile 中需要的“taps” gem (http://rubygems.org/gems/taps) 对“sqlite3-ruby” gem 具有运行依赖。

您通常可以通过查看 Gemfile.lock 来找出奇怪的依赖项来自哪里。文件，正如你在这里看到的......

taps (0.3.23)
  rack (>= 1.0.1)
  rest-client (< 1.7.0, >= 1.4.0)
  sequel (~> 3.20.0)
  sinatra (~> 1.0.0)
  sqlite3-ruby (~> 1.2)

每个 gem 都将列出其运行时依赖项以及它需要的版本。