Module: LazyLoadAttributes::ClassMethods

Defined in:
lib/lazy_load_attributes.rb

Instance Method Summary collapse

Instance Method Details

#all_lazy_attributes ⇒ Object 



20
21
22
23
24
 
# File 'lib/lazy_load_attributes.rb', line 20

def all_lazy_attributes
  ancestors.select { |ancestor| ancestor.singleton_class.include?(::LazyLoadAttributes) }
           .map(&:lazy_attributes)
           .reduce(&:|)
end

#lazy_attr_accessor(attribute, &initializer) ⇒ Object 



26
27
28
29
30
31
32
33
34
35
 
# File 'lib/lazy_load_attributes.rb', line 26

def lazy_attr_accessor(attribute, &initializer)
  accessor = [
    *lazy_attr_reader(attribute, &initializer),
    *attr_writer(attribute)
  ]

  return nil if Gem.ruby_version < RUBY_3

  accessor
end

#lazy_attr_reader(attribute, &initializer) ⇒ Object

rubocop:disable Metrics/MethodLength

Raises:

  • (NameError) 


37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/lazy_load_attributes.rb', line 37

def lazy_attr_reader(attribute, &initializer) # rubocop:disable Metrics/MethodLength
  raise NameError, "bad attribute name '#{attribute}' (use a-z, 0-9, _)" unless attribute.match? ATTR_NAME_REGEX
  raise ArgumentError, "no initializer block given in lazy-loaded attribute definition" if initializer.nil?

  lazy_attributes.add(attribute)

  define_method(attribute) do
    instance_variable = :"@#{attribute}"
    if instance_variable_defined?(instance_variable)
      instance_variable_get(instance_variable)
    else
      instance_variable_set(instance_variable, instance_eval(&initializer))
    end
  end

  return nil if Gem.ruby_version < RUBY_3

  [attribute]
end

#lazy_attributes ⇒ Object 



16
17
18
 
# File 'lib/lazy_load_attributes.rb', line 16

def lazy_attributes
  @lazy_attributes ||= Set.new
end