Module: Coatepec::Introspection::SafeOptions

Defined in:
lib/coatepec/introspection/safe_options.rb

Overview

Filters an ActiveRecord validator's options hash down to genuinely primitive values before it's serialized as rails_model output. Validator options can carry arbitrary Ruby objects (Proc for if:/ unless:, Regexp for with:, etc.) that must never be JSON-serialized as-is -- Proc#to_s leaks the target app's absolute source file path and line number. Only genuinely primitive values pass through; anything else is silently dropped.

Class Method Summary collapse

Class Method Details

.array_value_for(value) ⇒ Object

Symbol elements are stringified exactly as a bare Symbol value is above: inclusion: { in: %i[draft published] } is one of the most common option shapes in Rails, and dropping the whole in: key for it while keeping the single-Symbol equivalent would be arbitrary. An array still holding anything non-primitive after that is dropped whole -- a mixed array's non-primitive members can't be silently elided without misrepresenting the option.



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# File 'lib/coatepec/introspection/safe_options.rb', line 40

def array_value_for(value)
  stringified = value.map { |element| element.is_a?(Symbol) ? element.to_s : element }
  stringified.all? { |element| element.is_a?(String) || element.is_a?(Numeric) } ? stringified : nil
end

.call(options) ⇒ Object 



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# File 'lib/coatepec/introspection/safe_options.rb', line 15

def call(options)
  options.filter_map do |key, value|
    safe_value = value_for(value)
    [key.to_s, safe_value] unless safe_value.nil? && !value.nil?
  end.to_h
end

.value_for(value) ⇒ Object 



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# File 'lib/coatepec/introspection/safe_options.rb', line 22

def value_for(value)
  case value
  when String, Numeric, TrueClass, FalseClass, NilClass
    value
  when Symbol
    value.to_s
  when Array
    array_value_for(value)
  end
end