rake db:reset 抛出错误

Question

我正在关注napa api framework tutorial，了解如何创建 API。但是在运行rake db:reset 时会引发以下错误

WARN: Unresolved specs during Gem::Specification.reset:
  minitest (~> 4.2)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.
rake aborted!
NameError: uninitialized constant Virtus::Configuration::Coercible
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/virtus-1.0.5/lib/virtus/configuration.rb:40:in `initialize'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/virtus-1.0.5/lib/virtus/builder.rb:28:in `new'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/virtus-1.0.5/lib/virtus/builder.rb:28:in `call'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/virtus-1.0.5/lib/virtus.rb:152:in `model'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/representable-1.8.5/lib/representable/coercion.rb:5:in `<class:Coercer>'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/representable-1.8.5/lib/representable/coercion.rb:4:in `<module:Coercion>'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/representable-1.8.5/lib/representable/coercion.rb:3:in `<top (required)>'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/roar-0.12.9/lib/roar/representer/feature/coercion.rb:2:in `require'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/roar-0.12.9/lib/roar/representer/feature/coercion.rb:2:in `<top (required)>'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/napa-0.4.3/lib/napa/output_formatters/representer.rb:3:in `require'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/napa-0.4.3/lib/napa/output_formatters/representer.rb:3:in `<top (required)>'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/napa-0.4.3/lib/napa.rb:27:in `require'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/napa-0.4.3/lib/napa.rb:27:in `<top (required)>'
/home/jay/AppService/app.rb:6:in `require'
/home/jay/AppService/app.rb:6:in `<top (required)>'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:126:in `require'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:126:in `require'
/home/jay/AppService/Rakefile:6:in `<top (required)>'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/rake_module.rb:28:in `load'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/rake_module.rb:28:in `load_rakefile'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:689:in `raw_load_rakefile'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:94:in `block in load_rakefile'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:93:in `load_rakefile'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:77:in `block in run'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:75:in `run'
/home/jay/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rake-10.4.2/bin/rake:33:in `<top (required)>'
/home/jay/.rbenv/versions/2.0.0-p576/bin/rake:23:in `load'
/home/jay/.rbenv/versions/2.0.0-p576/bin/rake:23:in `<main>'

任何帮助将不胜感激。

Answer 1

一年后，我遇到了类似的问题。我已经解决了。在尝试在 Mac OS El Capitan 上运行 Napa 快速入门时，我注意到它正在提取不兼容的 napa 0.5.1。我做的第一件事是更改为 napa 0.5.0。

接下来的事情是将活动记录 4.2.0 从 4.0.0 更改为摆脱了 minitest gem 问题。

我希望这可以帮助任何第一次访问纳帕但无法让 quicstart 工作的人。

另外，我尝试了 MySQl 的快速入门，而不是本教程使用的 Postgres。