array_usage.md

Usage with Array

For more details on basic setup, visit Basic Composer Page

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Arrays are treated special with the composed methods. ClassComposer will inject a custom method << so that it can be treated as a regular array with the added benefit of validation still occurring.

class CustomArrayClass
  include ClassComposer::Generator

  add_composer :array, allowed: Array, default: [], validator: ->(val) { val.sum < 40 }, invalid_message: ->(val) { "Array sum of [#{val.sum}] must be less than 40" }
end

instance = CustomArrayClass.new
instance.array << 1
instance.array << 2
instance.array
=> [1, 2]
instance.array << 50
ClassComposer::ValidatorError: CustomArrayClass.array failed validation. array is expected to be Array. Array sum of [53] must be less than 40