Question

我正在尝试使用 Rails 3 环境创建 Ruby 脚本。

但是，每当我使用 Rails Runner 运行此rubyscript时，我都会收到此错误：

require 'rubygems'
require 'json'

@payload = {
"message" => "helloworld",
"station" => {"id"=>12345}
}.to_json

puts @payload

错误：

/usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:212:in `require': no such file to load -- json (LoadError)
 from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:212:in `require'
 from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:198:in `load_dependency'
 from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:554:in `new_constants_in'
 from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:198:in `load_dependency'
 from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:212:in `require'
 from createflags.rb:2
 from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands.rb:39:in `eval'
 from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands/runner.rb:47
 from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands.rb:39:in `require'
 from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands.rb:39
 from script/rails:6:in `require'
 from script/rails:6

有人可以告诉我，我可以做些什么来解决这个问题？

Answer 1

我并不完全熟悉Bundler的内部结构，但它可能不允许require其他gem不在Gemfile中。也许添加gem 'json'可以解决这个问题。

当然，ActiveSupport有自己的JSON模块，因此不需要引入另一个gem。

Answer 2

删除需要“json”然后尝试。我相信ActiveSupport已经内置了to_json。

Rails 3 runner没有检测到JSON gem？

2 个答案: