Module: Shamu::Attributes::Equality

Included in:

Entities::Entity, Events::Message

Defined in:

lib/shamu/attributes/equality.rb

Overview

Override equality methods to support shallow comparison of attribute values for equality.

Add ignore_equality: true to any Attributes::DSL#attribute that shouldn’t be included in equality comparisons.

Instance Method Summary

• #==(other) ⇒ Boolean (also: #eql?)

  True if the two objects are of the same type and attributes are all eql? to each other.

• #hash ⇒ Integer

  A hash computed from the attributes of the object.

Instance Method Details

#==(other) ⇒ Boolean Also known as: eql?

Returns true if the two objects are of the same type and attributes are all eql? to each other.

Parameters:

• other (Attributes) —

  object to compare with.

Returns:

• (Boolean) —

  true if the two objects are of the same type and attributes are all eql? to each other.

# File 'lib/shamu/attributes/equality.rb', line 14

def ==( other )
  return true if other.object_id == object_id
  return false unless other.is_a?( self.class ) || is_a?( other.class )
  attributes_eql?( other )
end

#hash ⇒ Integer

Returns a hash computed from the attributes of the object.

Returns:

• (Integer) —

  a hash computed from the attributes of the object.

# File 'lib/shamu/attributes/equality.rb', line 22

def hash
  self.class.attributes.map do |key, _|
    send( key )
  end.hash
end