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Fedena 安装问题。无法通过 创建数据库rake db:create。所有 gem 似乎都是 fedena 应用程序的正确版本。Config/database.yml显然是正确的。无法在 MySQL 中创建数据库的一个可能原因是为 fedena 指定的 RoR 版本不同。即ver 1.8.7vs ruby 2.5.0p0(2017-12-25 修订版 61468) [x64-mingw32] (后来安装在系统上)

请看下面：

d:\fedena>rake db:create
Traceback (most recent call last):
        13: from C:/Ruby25-x64/bin/rake:23:in `<main>'
        12: from C:/Ruby25-x64/bin/rake:23:in `load'
        11: from C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rake-0.8.7/bin/rake:26:in `<top (required)>'
        10: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
         9: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
         8: from C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rake-0.8.7/lib/rake.rb:41:in `<top (required)>'
         7: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
         6: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
         5: from C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rake-0.8.7/lib/rake/win32.rb:2:in `<top (required)>'
         4: from C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rake-0.8.7/lib/rake/win32.rb:3:in `<module:Rake>'
         3: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
         2: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
         1: from C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rake-0.8.7/lib/rake/alt_system.rb:31:in `<top (required)>'
C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rake-0.8.7/lib/rake/alt_system.rb:32:in `<module:AltSystem>': uninitialized constant Rake::AltSystem::Config (NameError)
Did you mean?  RbConfig

任何建议和指导都会很棒。

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