heroku - sqlite3 和 heroku 的问题

Question

每次我尝试在 Heroku 上获取它时，我的应用程序都会崩溃(学校项目需要)。它在本地完美运行。

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日志是这样说的:

2015-05-23T23:52:47.952635+00:00 heroku[web.1]: State changed from crashed to starting
2015-05-23T23:52:50.499347+00:00 heroku[web.1]: Starting process with command `bundle exec thin start -R config.ru -e $RACK_ENV -p 10414`
2015-05-23T23:52:52.736994+00:00 app[web.1]: /app/vendor/bundle/ruby/2.0.0/gems/dm-core-1.2.1/lib/dm-core/adapters.rb:163:in `require': cannot load such file -- dm-sqlite-adapter (LoadError)
...
2015-05-23T23:53:11.790209+00:00 heroku[run.9012]: Awaiting client
2015-05-23T23:53:11.844408+00:00 heroku[run.9012]: Starting process with command `bundle exec irb`
2015-05-23T23:53:12.025719+00:00 heroku[run.9012]: State changed from starting to up
2015-05-23T23:54:03.317467+00:00 heroku[run.9012]: Process exited with status 0
2015-05-23T23:54:03.336441+00:00 heroku[run.9012]: State changed from up to complete
2015-05-23T23:54:08.767294+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=mysterious-woodland-2551.herokuapp.com request_id=a53bb16e-88e6-4701-857f-bd3319ce8d91 fwd="129.210.115.16" dyno= connect= service= status=503 bytes=
2015-05-23T23:54:09.427490+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=mysterious-woodland-2551.herokuapp.com request_id=8effbba8-b14f-4b8a-bb2f-a7a4eae5e44c fwd="129.210.115.16" dyno= connect= service= status=503 bytes=

我的 Gemfile 看起来像这样

    # A sample Gemfile
    source "https://rubygems.org"
    ruby '2.0.0'

    gem 'sinatra'
    gem 'slim'
    gem 'sass'
    gem 'dm-core'
    gem 'dm-migrations'
    gem 'thin'
    group :development, :test do
      gem 'sqlite3'
    end

    group :production do
      gem 'pg'
    end

主要.rb

#!/user/bin/env ruby

require 'sinatra'
require 'slim'
require 'sass'
require './student'

configure do
  enable :sessions
  set :username, 'kenneth'
  set :password, 'bigler'
end

get('/styles.css'){ scss :styles }

get '/' do
  slim :home
end
...

学生.rb

require 'dm-core'
require 'dm-migrations'

# DataMapper.setup(:default, "sqlite3://#{Dir.pwd}/development.db")
DataMapper::setup(:default, ENV['DATABASE_URL'] || "sqlite3://#{Dir.pwd}/development.db")

class Student
  include DataMapper::Resource
  property :id, Serial
  property :first_name, Text
  property :last_name, Text
  property :year, Integer
end

configure do
  enable :sessions
  set :username, 'kenneth'
  set :password, 'bigler'
end

DataMapper.finalize

get '/students' do
...

当我输入 heroku run console 时

需要'./main'

我得到:

LoadError: cannot load such file -- dm-sqlite-adapter
    from /app/vendor/bundle/ruby/2.0.0/gems/dm-core-1.2.1/lib/dm-core/adapters.rb:163:in `require'
    from /app/vendor/bundle/ruby/2.0.0/gems/dm-core-1.2.1/lib/dm-core/adapters.rb:163:in `load_adapter'
    from /app/vendor/bundle/ruby/2.0.0/gems/dm-core-1.2.1/lib/dm-core/adapters.rb:133:in `adapter_class'
    from /app/vendor/bundle/ruby/2.0.0/gems/dm-core-1.2.1/lib/dm-core/adapters.rb:13:in `new'
    from /app/vendor/bundle/ruby/2.0.0/gems/dm-core-1.2.1/lib/dm-core.rb:230:in `setup'
    from /app/student.rb:5:in `<top (required)>'
    from /app/main.rb:6:in `require'
    from /app/main.rb:6:in `<top (required)>'
    from (irb):1:in `require'
    from (irb):1
    from /app/bin/irb:16:in `<main>'

对我能做什么有什么建议吗？

Answer 1

你收到这个错误是因为 heroku 没有它使用 postgresql 的 Sqlite 适配器。因此，您需要跳过在 Heroku 上使用 Sqlite 适配器。

1. 如果您正在使用 DataMapper，那么请像下面这样使用它-

DataMapper::setup(:default, ENV['DATABASE_URL'] || "sqlite3:你的数据库文件名")

1. 检查您是否按照以下步骤操作。也许您可以从下面完成几步，所以请忽略这些并按照其余步骤进行操作。

<强>1。在 Heroku 网站注册:

https://id.heroku.com/login (链接到外部站点。)

1. 下载工具带

2. 获取 bundler gem:

   gem install bundler

3. 在应用程序目录中创建“Gemfile”:

4. 它将在您的应用程序目录中创建“Gemfile.lock”文件。

bundle install --without production

1. 为 rackup 程序创建“config.ru”文件，包含以下内容

需要'./main'

运行 Sinatra::应用程序

1. 初始化 git 仓库，在你的应用程序文件夹中，运行:

git init

1. 设置 git 身份:

git config user.name "your-name"

git config user.email "yourname@email.com"

1. 将应用程序添加到 git 存储库并提交，在您的应用程序文件夹中，运行:

git add .

git commit -m "my first version"

1. 在 Heroku 上创建应用程序

heroku create myapplication1

1. 将应用程序从 git 存储库推送到 Heroku 服务器

git push heroku master

<强>12。在 Heroku 服务器上创建数据库

heroku run console

irb> 需要 './main'

irb> DataMapper.auto_migrate!

connect to new web site

heroku open