It's the new hash syntax introduced in ruby 1.9.
On Oct 23, 2013 11:22 PM, "Jedrin" <jrubia...@gmail.com> wrote:

>
> In mongoid, a ORM mapped database object is like below. The part "type:
> String" seems to me to not fit into any standard ruby syntax and I was
> curious how does mongoid implement that ?
>
>
> class Step
>   include Mongoid::Document
>
>   field :Label, type: String
>   field :Descript, type: String
>   field :ErrorText, type: String
>
>   embedded_in :step_data
>
> end
>
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