Class: Kweerie::BaseObject

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

Class Method Summary collapse

Methods inherited from Base

all, bind, inherited, sql_content, sql_file_location, sql_path

Class Method Details

.cast_definitions ⇒ Object 



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# File 'lib/kweerie/base_object.rb', line 26

def cast_definitions
  @cast_definitions ||= {}
end

.cast_select(field, as: nil) ⇒ Object 



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# File 'lib/kweerie/base_object.rb', line 22

def cast_select(field, as: nil)
  cast_definitions[field] = as if as
end

.generate(attribute_names) ⇒ Object 



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# File 'lib/kweerie/base_object.rb', line 30

def generate(attribute_names)
  cast_definitions = self.cast_definitions
  Class.new(self) do
    include Comparable
    include ObjectMethods::Accessors
    include ObjectMethods::Comparison
    include ObjectMethods::KeyTransformation
    include ObjectMethods::Serialization
    include ObjectMethods::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
      @_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

.with(params = {}) ⇒ Object 



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# File 'lib/kweerie/base_object.rb', line 12

def with(params = {})
  results = super
  return [] if results.empty?

  # Create a unique result class for this query
  result_class = generate(results.first.keys)
  # Map results to objects
  results.map { |row| result_class.new(row) }
end