Question

当我运行rake db：migrate时，我收到以下错误。请让我知道原因。

环境 - Windows 7家庭高级版 Rails

F:/ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
F:/ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
F:/ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require'
F:/ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in'
F:/ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require'
F:/example/ROR//vendor/plugins/savage-beast/lib/tasks/savage_beast.rake:2
F:/ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:145:in `load_without_new_constant_marking'
F:/ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:145:in `load'
F:/ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in'
F:/ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:145:in `load'
F:/ruby187/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/tasks/rails.rb:13
F:/ruby187/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/tasks/rails.rb:13:in `each'
F:/ruby187/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/tasks/rails.rb:13
F:/ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
F:/ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
F:/example/ROR/Rakefile:10
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2383:in `load'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2383:in `raw_load_rakefile'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2017:in `load_rakefile'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2016:in `load_rakefile'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2000:in `run'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
F:/ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
F:/Ruby187/bin/rake:19:in `load'
F:/Ruby187/bin/rake:19

Answer 1

似乎没有正确安装Rails gem，因为Rake：db create是一个Rails方法，在你的情况下似乎它没有正常运行。

您可以参考this

Step By Step安装程序

Answer 2

您可以尝试以下命令rake db:create:all后跟rake db:migrate如果没有为项目设置数据库，则可能会出现此错误。你的app / config文件夹中有database.yml个文件吗？

rake db：在rails上创建ruby

2 个答案: