serialize methods by to_json

rubyonrails-talk
1

I don't believe you can pass params using the methods option. One approach would be to calculate the outcome on the collection before calling to_json.

def calculate_outcome(arg) @outcome = # do calculation with arg end

def outcome   @outcome end

collection.each {|c| c.calculate_outcome(arg)} collection.to_json(:methods => [:income, :outcome])

HTH, Nicholas