how is mongoid syntax implemented ?

[Jedrin]

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

[Dheeraj Kumar]

It's the new hash syntax introduced in ruby 1.9.

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[Josh Jordan]

That is valid hash syntax. You're call a method with a signature like:

def field(field_name, options = {})

  ...

end

field_name is a symbol, options is a hash where the keys are symbols and the values are constants (class objects).