Module: LazyRecord::Associations

Includes:
Nesting
Defined in:
lib/lazy_record/associations.rb

Overview

Set up in-memory one-to-one associations between POROs.

Constant Summary collapse

ASSOCIATION_MODULE_NAME = 
:Associations

Instance Method Summary collapse

Methods included from Nesting

#apply_nesting, #apply_nesting_one_level_back, #lazy_const_get, #lazy_const_get_one_level_back

Instance Method Details

#add_has_one_methods(args) ⇒ Object 



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# File 'lib/lazy_record/associations.rb', line 18

def add_has_one_methods(args)
  define_has_one_associations(*args)
  define_has_one_associations_to_s
  args.each do |association|
    define_association_setter(association)
    define_association_getter(association)
  end
end

#define_association_getter(association) ⇒ Object 



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# File 'lib/lazy_record/associations.rb', line 50

def define_association_getter(association)
  define_method(association) do
    instance_variable_get("@#{association}")
  end
end

#define_association_setter(assoc) ⇒ Object 



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# File 'lib/lazy_record/associations.rb', line 42

def define_association_setter(assoc)
  klass = lazy_const_get_one_level_back(assoc.to_s.camelize).call
  define_method("#{assoc}=") do |val|
    return instance_variable_set("@#{assoc}", val) if val.is_a? klass
    raise ArgumentError, "Argument must be a #{klass}"
  end
end

#define_has_one_associations(*args) ⇒ Object 



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# File 'lib/lazy_record/associations.rb', line 27

def define_has_one_associations(*args)
  define_method(:associations) do
    args
  end
end

#define_has_one_associations_to_s ⇒ Object 



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# File 'lib/lazy_record/associations.rb', line 33

def define_has_one_associations_to_s
  define_method(:associations_to_s) do
    associations.map do |association|
      "#{association}: #{stringify_value(send(association))}"
    end
  end
  private :associations_to_s
end

#lr_has_one(*args) ⇒ Object 



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# File 'lib/lazy_record/associations.rb', line 12

def lr_has_one(*args)
  include mod = get_or_set_mod(ASSOCIATION_MODULE_NAME)
  mod.extend(Associations) unless mod.const_defined?('Associations')
  mod.module_eval { add_has_one_methods(args) }
end