新手问题 scaffold 生成的页面无法运行
You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.[]
用 sqlite 就可以，mongoid 的话却不行
You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.[]
用 sqlite 就可以，mongoid 的话却不行