validation rules on model members and parameters

[fluxtah]

The grammar could be updated to validate parameters for instance:

params 
    auth_token:string (required), 
    page:long (required),
    range:long (required, 1..50),
    email:string (required, email)

The above is just an idea, would need to flesh out what options would be available for each field.

Required Flag

auth_token:string (required)

Ranges (for numerical types)

Can draw some inspiration from ruby here http://www.ruby-doc.org/core-2.1.2/Range.html

range:long (1..50),
range2:long (5..*),
range3:long (20..30)