将应用部署到Heroku

Question

当我想要将我的应用部署到heroku (使用git push heroku master)时，它给我一个错误，并告诉我安装sqlite3 -v '1.3.6‘。所以在成功安装了这个gem之后，我再次尝试将它部署到heroku上，它仍然给我同样的错误！！但是，我已经安装了它。现在我甚至不能在本地运行我的rails项目(rails服务器)。我可以知道这可能是什么原因吗？

以下是我在database.yml文件中的内容：

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
development:
  adapter: sqlite3
  database: db/development.sqlite3
  pool: 5
  timeout: 5000

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: sqlite3
  database: db/test.sqlite3
  pool: 5
  timeout: 5000

production:
  adapter: sqlite3
  database: db/production.sqlite3
  pool: 5
  timeout: 5000

Answer 1

Heroku不适用于SQLite3

打开Gemfile并替换该行：

gem 'sqlite3'

为

group :production do
  gem 'pg'
end

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

我还建议你阅读heroku的说明：https://devcenter.heroku.com/articles/rails3

Answer 2

让你的gemfile看起来像这样

      group :production do
         gem 'pg'
      end
      group :development, :test do
         gem 'sqlite3-ruby', :require => 'sqlite3'
      end