Class: Kweerie::ResultClassGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/kweerie/result_class_generator.rb

Class Method Summary collapse

Class Method Details

.generate(parent_class, attribute_names) ⇒ Object



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# File 'lib/kweerie/result_class_generator.rb', line 11

def self.generate(parent_class, attribute_names)
  Class.new(parent_class) do
    include Comparable
    include ResultClassComponents::Accessors
    include ResultClassComponents::Comparison
    include ResultClassComponents::KeyTransformation
    include ResultClassComponents::Serialization
    include ResultClassComponents::TypeCasting

    # Define attr_readers for all columns
    attribute_names.each { |name| attr_reader name }

    define_method :initialize do |attrs|
      # Store both raw and casted versions
      cast_definitions = parent_class.cast_definitions

      @_raw_original_attributes = attrs.dup
      @_original_attributes = attrs.each_with_object({}) do |(key, value), hash|
        type_definition = cast_definitions[key.to_sym]
        casted_value = type_cast_value(value, type_definition)
        hash[key.to_s] = casted_value
        instance_variable_set("@#{key}", casted_value)
      end

      super() if defined?(super)
    end

    # Nice inspect output
    define_method :inspect do
      attrs = attribute_names.map do |name|
        "#{name}=#{instance_variable_get("@#{name}").inspect}"
      end.join(" ")
      "#<#{self.class.superclass.name} #{attrs}>"
    end

    # Make attribute_names available to instance methods
    define_method(:attribute_names) { attribute_names }
  end
end