Class: Bullet::Detector::UnusedEagerLoading

Inherits:
Association show all
Defined in:
lib/bullet/detector/unused_eager_loading.rb

Class Method Summary collapse

Methods inherited from Association

add_call_object_associations, add_object_associations, impossible_objects, possible_objects

Class Method Details

.add_eager_loadings(objects, associations) ⇒ Object 



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# File 'lib/bullet/detector/unused_eager_loading.rb', line 22

def add_eager_loadings(objects, associations)
  return unless Bullet.start?
  return unless Bullet.unused_eager_loading_enable?
  return if objects.map(&:primary_key_value).compact.empty?

  Bullet.debug("Detector::UnusedEagerLoading#add_eager_loadings", "objects: #{objects.map(&:bullet_key).join(', ')}, associations: #{associations}")
  bullet_keys = objects.map(&:bullet_key)

  to_add = nil
  to_merge, to_delete = [], []
  eager_loadings.each do |k, v|
    key_objects_overlap = k & bullet_keys

    next if key_objects_overlap.empty?

    if key_objects_overlap == k
      to_add = [k, associations]
      break
    else
      to_merge << [key_objects_overlap, ( eager_loadings[k].dup  << associations )]

      keys_without_objects = k - bullet_keys
      to_merge << [keys_without_objects, eager_loadings[k]]
      to_delete << k
      bullet_keys = bullet_keys - k
    end
  end

  eager_loadings.add(*to_add) if to_add
  to_merge.each { |k,val| eager_loadings.merge k, val }
  to_delete.each { |k| eager_loadings.delete k }

  eager_loadings.add bullet_keys, associations unless bullet_keys.empty?
end

.check_unused_preload_associations ⇒ Object

check if there are unused preload associations.

get related_objects from eager_loadings associated with object and associations
get call_object_association from associations of call_object_associations whose object is in related_objects
if association not in call_object_association, then the object => association - call_object_association is ununsed preload assocations



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# File 'lib/bullet/detector/unused_eager_loading.rb', line 9

def check_unused_preload_associations
  return unless Bullet.start?
  return unless Bullet.unused_eager_loading_enable?

  object_associations.each do |bullet_key, associations|
    object_association_diff = diff_object_associations bullet_key, associations
    next if object_association_diff.empty?

    Bullet.debug("detect unused preload", "object: #{bullet_key}, associations: #{object_association_diff}")
    create_notification bullet_key.bullet_class_name, object_association_diff
  end
end