Ruby on rails 如何在win 7上安装caldecott？

我已经创建了一个，我想上传到phpfog上，但是在第一步上传我的数据库时遇到了麻烦，我赢得了7 x64，我用ruby下载并安装了命令提示符，同时创建了一个隧道：

 C:\Ruby200\devkit>gem install caldecott --platform=ruby
    Temporarily enhancing PATH to include DevKit...
    Building native extensions.  This could take a while...
    ERROR:  Error installing caldecott:
            ERROR: Failed to build gem native extension.

        C:/Ruby200/bin/ruby.exe extconf.rb
    creating Makefile

    make
    generating generator-i386-mingw32.def
    compiling generator.c
    generator.c: In function 'cState_aref':
    generator.c:632:5: warning: variable 'state' set but not used [-Wunused-but-set-
    variable]
    generator.c: In function 'isArrayOrObject':
    generator.c:867:5: warning: suggest parentheses around '&&' within '||' [-Wparen
    theses]
    linking shared-object json/ext/generator.so

    make install
    /usr/bin/install -c -m 0755 generator.so C:/Ruby200/lib/ruby/gems/2.0.0/gems/jso
    n-1.6.8/ext/json/ext/json/ext
    /usr/bin/install: cannot create regular file `C:/Ruby200/lib/ruby/gems/2.0.0/gem
    s/json-1.6.8/ext/json/ext/json/ext': No such file or directory
    make: *** [install-so] Error 1


    Gem files will remain installed in C:/Ruby200/lib/ruby/gems/2.0.0/gems/json-1.6.
    8 for inspection.
    Results logged to C:/Ruby200/lib/ruby/gems/2.0.0/gems/json-1.6.8/ext/json/ext/ge
    nerator/gem_make.out

    C:\Ruby200\devkit>gem install caldecott --platform=ruby


`

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Ruby 2.0.0版本出现此错误。降级到Ruby 1.9.3

我有Win7 x64、Ruby 2.0.0、DevKit（DevKit-mingw64-32-4.7.2-20130224-1151）

我也面临同样的问题。我的解决方案：

从github下载gem源代码-

解压缩到C:\caldecott（例如）

打开文件caldecott.gempec并将json依赖项的版本更改为“~>1.7”

打开命令提示符，移动到gem源目录并执行以下操作：

gem build caldecott.gemspec

gem安装caldecott-0.0.5.gem

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以上就是你所说的

4是什么意思。打开命令提示符，移动到gem源目录并执行：

。