Contents

# @see https://www.rubydoc.info/docs/rails/ActiveModel/Type/Value
class Anchormodel::ActiveModelTypeValue < ActiveModel::Type::Value
  def initialize(attribute)
    super()
    @attribute = attribute
  end

  def cast(value)
    serialize value
  end

  # Implementing this instead of cast to force key validation in any case
  def serialize(value)
    value = value.presence
    return case value
           when Symbol, String
             unless @attribute.anchormodel_class.valid_keys.include?(value.to_sym)
               fail("Attempt to set #{@attribute.attribute_name} to unsupported key #{value.inspect}.")
             end
             value.to_s
           when @attribute.anchormodel_class
             value.key.to_s
           when nil
             nil
           else
             fail "Attempt to set #{@attribute.attribute_name} to unsupported type #{value.class}"
           end
  end

  def deserialize(value)
    value = value.presence
    return value if value.is_a?(@attribute.anchormodel_class)
    return @attribute.anchormodel_class.find(value)
  end

  def changed?(old_value, new_value, _new_value_before_type_cast)
    return deserialize(old_value) != deserialize(new_value)
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
anchormodel-0.1.3	lib/anchormodel/active_model_type_value.rb
anchormodel-0.1.2	lib/anchormodel/active_model_type_value.rb