Rails rake db:create 不起作用

Question

我拥有计算机科学和编程背景，并且熟悉 *nix CLI。

我是 ruby​​ on rails 的新手，我正在做一个在线训练营。我的一课是让我创建一个新的 Rails 应用程序。它首先使用以下命令来创建一个新的 Rails 应用程序并创建数据库：

$ rails new bloccit -T
$ cd bloccit
$ rake db:create

当我运行rake 命令时，进程只是挂起。我让它运行了 30 分钟，它就坐在那里。当我进行硬中断时，我得到以下堆栈跟踪：

^C/Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/client/run.rb:99:in `gets': Interrupt
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/client/run.rb:99:in `verify_server_version'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/client/run.rb:56:in `run'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/client/run.rb:37:in `warm_run'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/client/run.rb:26:in `call'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/client/command.rb:7:in `call'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/client.rb:26:in `run'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/bin/spring:48:in `<top (required)>'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/binstub.rb:11:in `load'
from /Users/mikekeathley/.rvm/gems/ruby-2.2.1/gems/spring-1.3.4/lib/spring/binstub.rb:11:in `<top (required)>'
from /Users/mikekeathley/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/mikekeathley/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/mikekeathley/code/bloccit/bin/spring:13:in `<top (required)>'
from bin/rake:3:in `load'
from bin/rake:3:in `<main>'

我了解堆栈跟踪：在 run.rb 文件的第 99 行，gets 方法卡住了。我只是对春天一无所知。

我正在运行 Ruby 2.2.1p85、Rails 4.2.1 和 sqlite3 1.3.10。

Answer 1

使用命令停止弹簧

bin/spring stop

然后再次运行 rake 命令。它会解决这个问题。