我正在尝试使用 heroku 使用的免费托管。我尝试了很多选项，但仍然在 heroku 日志上收到此错误“请安装 postgresql 适配器：`gem install ...”。
首先，我在大约 1 年前遇到了同样的错误，我期待 heroku 现在能解决这个问题。
我必须做些什么才能让它发挥作用？
这是我的 GEMFILE：
1 source 'https://rubygems.org'
2
3 gem 'rails', '3.2.14'
4
5 # Bundle edge Rails instead:
6 # gem 'rails', :git => 'git://github.com/rails/rails.git'
7
8 gem 'activerecord-postgresql-adapter'
9 gem 'typhoeus'
10
11 # Gems used only for assets and not required
12 # in production environments by default.
13 group :assets do
14 gem 'sass-rails', '~> 3.2.3'
15 gem 'coffee-rails', '~> 3.2.1'
16 gem "twitter-bootstrap-rails"
17 # See https://github.com/sstephenson/execjs#readme for more supported runtimes
18 # gem 'therubyracer', :platforms => :ruby
19
20 gem 'uglifier', '>= 1.0.3'
21 end
22
23 group :development do
24 gem 'debugger'
25 end
26
27 group :development, :test do
28 gem 'capybara'
29 gem 'rspec-rails', '~> 2.0'
30 gem 'factory_girl'
31 gem 'mysql2'
32 end
33
34 group :test do
35 gem 'vcr'
36 end
37
38 group :production do
39 gem 'pg'
40 end
41
42 gem 'proxylocal'
43
44 gem 'devise'
45 gem 'jquery-rails'
46 gem 'turbolinks'
和我的 config/database.yml 文件：
1 # MySQL. Versions 4.1 and 5.0 are recommended.
2 #
3 # Install the MYSQL driver
4 # gem install mysql2
5 #
6 # Ensure the MySQL gem is defined in your Gemfile
7 # gem 'mysql2'
8 #
9 # And be sure to use new-style password hashing:
10 # http://dev.mysql.com/doc/refman/5.0/en/old-client.html
11 development:
12 adapter: postgresql
13 encoding: utf8
14 reconnect: false
15 database: resource-management_development
16 pool: 5
17 username: root
18 password:
19 socket: /tmp/mysql.sock
20
21 # Warning: The database defined as "test" will be erased and
22 # re-generated from your development database when you run "rake".
23 # Do not set this db to the same as development or production.
24 test: &test
25 adapter: postgresql
26 encoding: utf8
27 reconnect: false
28 database: resource-management_test
29 pool: 5
30 username: root
31 password:
32 socket: /tmp/mysql.sock
33
34 production:
35 adapter: postgresql
36 encoding: utf8
37 reconnect: false
38 database: resource-management_production
39 pool: 5
40 username: root
41 password:
42 socket: /tmp/mysql.sock
43
44 cucumber:
45 <<: *test
这是完整的错误：
/app/vendor/bundle/ruby/2.0.0/gems/bundler-1.3.2/lib/bundler/rubygems_integration.rb:214:in `block in replace_gem': Please install the postgresql adapter: `gem install activerecord-postgresql-a
dapter` (pg is not part of the bundle. Add it to Gemfile.) (LoadError)
有人可以解决它，所以我和很多人可以部署在这个被上帝遗弃的平台 heroku 上吗？
PS：你可能会注意到我在开发中有一个“gem 'mysql2'”，那是因为我从这里的另一个解决方案中得到了这个。无论如何，没有它它是行不通的。