Module: HashAccessor::ClassMethods

Defined in:
lib/hash_accessor/class_methods.rb

Instance Method Summary collapse

Instance Method Details

#hash_accessor(hash_name, method_name, options = {}) ⇒ Object

valid options: :default - if undefined, this plugin will create an empty instance of the defined type or null :type - defaults to :string. Can also be :integer, :float, :boolean, or :array

for arrays only: :collects - only runs on arrays. Calls the lambda method on each item in the array before saving :reject_blanks - removes all blank elements after the collect method



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# File 'lib/hash_accessor/class_methods.rb', line 17

def hash_accessor(hash_name, method_name, options = {})
  begin
    method_name = method_name.to_sym

    # Define getter
    define_method(method_name) do
      send("#{hash_name}=", {}) if send(hash_name).blank?
      if send(hash_name)[method_name].nil?
        send(hash_name)[method_name] = hash_accessor_default(options)
      end
      send(hash_name)[method_name]
    end

    # Define setter
    define_method("#{method_name}=") do |new_val|
      send("#{hash_name}=", {}) if send(hash_name).blank?
      method_modifier = hash_accessor_method_modifier(method_name, options)
      new_val = method_modifier.call(new_val)
      if send(hash_name)[method_name] != new_val
        instance_variable_set("@#{method_name}_changed", true)
      end
      send(hash_name)[method_name] = new_val
    end

    # Define changed?
    define_method("#{method_name}_changed?") do
      !!instance_variable_get("@#{method_name}_changed")
    end

    # Define special boolean accessor
    if options[:type]==:boolean or options[:type]==:bool
      define_method("#{method_name}?") do
        !!send(method_name)
      end
    end

  rescue Exception => e
    puts "\n\nError adding hash_accessor:\n#{e.message}\n#{e.backtrace}\n\n"
  end
end