rails validate in model that value is inside array

I have a form where i pass a field named :type and i want to check if it's value is inside an array of allowed types so that no one is allowed to post not-allowed types.

the array looks like

@allowed_types = [

i have tried using validates_exclusion_of or validates_inclusion_of but it doesn't seem to work


first, change the attribute from type to something else, type is a reserved attrubute name use for Single Table Inheritance and such.

class Thing < ActiveRecord::Base
   validates :mytype, :inclusion=> { :in => @allowed_types }

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