Module: Mongoid::Memoization

Defined in:
lib/mongoid/memoization.rb

Instance Method Summary collapse

Instance Method Details

#memoized(name, &block) ⇒ Object

Handles cases when accessing an association that should be memoized in the Mongoid specific manner. Does not memoize nil values though



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# File 'lib/mongoid/memoization.rb', line 6

def memoized(name, &block)
  var = "@#{name}"
  if instance_variable_defined?(var)
    return instance_variable_get(var)
  end
  value = yield
  instance_variable_set(var, value) if value
end

#reset(name, &block) ⇒ Object

Mongoid specific behavior is to remove the memoized object when setting the association, or if it wasn’t previously memoized it will get set.



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# File 'lib/mongoid/memoization.rb', line 23

def reset(name, &block)
  var = "@#{name}"
  value = yield
  if instance_variable_defined?(var)
    remove_instance_variable(var)
  else
    instance_variable_set(var, value)
  end
end

#unmemoize(name) ⇒ Object

Removes an memozied association if it exists



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# File 'lib/mongoid/memoization.rb', line 16

def unmemoize(name)
  var = "@#{name}"
  remove_instance_variable(var) if instance_variable_defined?(var)
end