Module: LazyRecord::Methods

Defined in:
lib/lazy_record/methods.rb

Overview

Macro for dynamic instance method generation. Best to use for one-liners.

Constant Summary collapse

METHODS_MODULE_NAME = 
:DynamicMethods

Instance Method Summary collapse

Instance Method Details

#lr_method(method_name, method) ⇒ Symbol

Defines an instance method on the calling class. The first agrument is a symbol that names the method. The second argument should be a lambda that defines the method execution. The method argument could technically be any object that responds to #to_proc and returns a Proc, but lambdas with their arity restrictions are preferred.

Example

class Thing < LazyRecord::Base
  lr_method :say_hi, -> { "Hi from #{self}" }
end

thing = Thing.new # => #<Thing>
thing.say_hi      # => "Hi from #<Thing:0x007fb9629c6260>"

Parameters:

  • method_name (Symbol, String)
  • method (Proc)

Returns:

  • (Symbol) 


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# File 'lib/lazy_record/methods.rb', line 28

def lr_method(method_name, method)
  mod = get_or_set_mod(METHODS_MODULE_NAME)

  mod.module_eval do
    define_method(method_name.to_sym, &method)
  end

  include mod unless include?(mod)
end