Module: OptionsModel::Concerns::Attributes::ClassMethods

Defined in:
lib/options_model/concerns/attributes.rb

Instance Method Summary collapse

Instance Method Details

#attribute(name, cast_type, default: nil, array: false) ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 9

def attribute(name, cast_type, default: nil, array: false)
  check_not_finalized!

  name = name.to_sym
  check_name_validity! name

  ActiveModel::Type.lookup(cast_type)

  attribute_defaults[name] = default
  default_extractor =
    case
    when default.respond_to?(:call)
      ".call"
    when default.duplicable?
      ".deep_dup"
    else
      ""
    end

  generated_attribute_methods.synchronize do
    generated_attribute_methods.module_eval "    def \#{name}\n      value = attributes[:\#{name}]\n      return value unless value.nil?\n      attributes[:\#{name}] = self.class.attribute_defaults[:\#{name}]\#{default_extractor}\n      attributes[:\#{name}]\n    end\n    STR\n\n    if array\n      generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1\n      def \#{name}=(value)\n        if value.respond_to?(:to_a)\n          attributes[:\#{name}] = value.to_a.map { |i| ActiveModel::Type.lookup(:\#{cast_type}).cast(i) }\n        elsif value.nil?\n          attributes[:\#{name}] = self.class.attribute_defaults[:\#{name}]\#{default_extractor}\n        else\n          raise ArgumentError,\n                \"`value` should respond to `to_a`, but got \\\#{value.class} -- \\\#{value.inspect}\"\n        end\n      end\n      STR\n    else\n      generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1\n      def \#{name}=(value)\n        attributes[:\#{name}] = ActiveModel::Type.lookup(:\#{cast_type}).cast(value)\n      end\n      STR\n\n      if cast_type == :boolean\n        generated_attribute_methods.send :alias_method, :\"\#{name}?\", name\n      end\n    end\n  end\n\n  self.attribute_names_for_inlining << name\n\n  self\nend\n", __FILE__, __LINE__ + 1

#attribute_defaults ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 138

def attribute_defaults
  @attribute_defaults ||= ActiveSupport::HashWithIndifferentAccess.new
end

#attribute_names ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 154

def attribute_names
  attribute_names_for_nesting + attribute_names_for_inlining
end

#attribute_names_for_inlining ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 150

def attribute_names_for_inlining
  @attribute_names_for_inlining ||= Set.new
end

#attribute_names_for_nesting ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 146

def attribute_names_for_nesting
  @attribute_names_for_nesting ||= Set.new
end

#embeds_one(name, class_name: nil, anonymous_class: nil) ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 93

def embeds_one(name, class_name: nil, anonymous_class: nil)
  check_not_finalized!

  if class_name.blank? && anonymous_class.nil?
    raise ArgumentError, "must provide at least one of `class_name` or `anonymous_class`"
  end

  name = name.to_sym
  check_name_validity! name

  if class_name.present?
    nested_classes[name] = class_name.constantize
  else
    nested_classes[name] = anonymous_class
  end

  generated_attribute_methods.synchronize do
    generated_attribute_methods.module_eval "    def \#{name}\n      nested_attributes[:\#{name}] ||= self.class.nested_classes[:\#{name}].new(attributes[:\#{name}])\n    end\n    STR\n\n    generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1\n    def \#{name}=(value)\n      klass = self.class.nested_classes[:\#{name}]\n      if value.respond_to?(:to_h)\n        nested_attributes[:\#{name}] = klass.new(value.to_h)\n      elsif value.is_a? klass\n        nested_attributes[:\#{name}] = value\n      elsif value.nil?\n        nested_attributes[:\#{name}] = klass.new\n      else\n        raise ArgumentError,\n              \"`value` should respond to `to_h` or \\\#{klass}, but got \\\#{value.class}\"\n      end\n    end\n    STR\n  end\n\n  self.attribute_names_for_nesting << name\n\n  self\nend\n", __FILE__, __LINE__ + 1

#enum_attribute(name, enum, default: nil, allow_nil: false) ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 69

def enum_attribute(name, enum, default: nil, allow_nil: false)
  check_not_finalized!

  unless enum.is_a?(Array) && enum.any?
    raise ArgumentError, "enum should be an Array and can't empty"
  end
  enum = enum.map(&:to_s)

  attribute name, :string, default: default

  pluralized_name = name.to_s.pluralize
  generated_class_methods.synchronize do
    generated_class_methods.module_eval "    def \#{pluralized_name}\n      %w(\#{enum.join(\" \")}).freeze\n    end\n    STR\n\n    validates name, inclusion: {in: enum}, allow_nil: allow_nil\n  end\n\n  self\nend\n", __FILE__, __LINE__ + 1

#finalize!(nested = true) ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 162

def finalize!(nested = true)
  if nested
    nested_classes.values.each(&:finalize!)
  end

  @finalized = true
end

#finalized? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/options_model/concerns/attributes.rb', line 158

def finalized?
  @finalized ||= false
end

#nested_classes ⇒ Object 



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# File 'lib/options_model/concerns/attributes.rb', line 142

def nested_classes
  @nested_classes ||= ActiveSupport::HashWithIndifferentAccess.new
end