diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/has_many_association.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/has_many_association.rb | 71 |
1 files changed, 10 insertions, 61 deletions
diff --git a/activerecord/lib/active_record/associations/has_many_association.rb b/activerecord/lib/active_record/associations/has_many_association.rb index 19cdd7f470..38bda0d2a5 100644 --- a/activerecord/lib/active_record/associations/has_many_association.rb +++ b/activerecord/lib/active_record/associations/has_many_association.rb @@ -15,7 +15,7 @@ module ActiveRecord when :restrict_with_error unless empty? - record = klass.human_attribute_name(reflection.name).downcase + record = owner.class.human_attribute_name(reflection.name).downcase message = owner.errors.generate_message(:base, :'restrict_dependent_destroy.many', record: record, raise: true) rescue nil if message ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) @@ -50,7 +50,7 @@ module ActiveRecord end def empty? - if has_cached_counter? + if reflection.has_cached_counter? size.zero? else super @@ -73,8 +73,8 @@ module ActiveRecord # If the collection is empty the target is set to an empty array and # the loaded flag is set to true as well. def count_records - count = if has_cached_counter? - owner._read_attribute cached_counter_attribute_name + count = if reflection.has_cached_counter? + owner._read_attribute reflection.counter_cache_column else scope.count end @@ -87,77 +87,26 @@ module ActiveRecord [association_scope.limit_value, count].compact.min end - - # Returns whether a counter cache should be used for this association. - # - # The counter_cache option must be given on either the owner or inverse - # association, and the column must be present on the owner. - def has_cached_counter?(reflection = reflection()) - if reflection.options[:counter_cache] || (inverse = inverse_which_updates_counter_cache(reflection)) && inverse.options[:counter_cache] - owner.attribute_present?(cached_counter_attribute_name(reflection)) - end - end - - def cached_counter_attribute_name(reflection = reflection()) - if reflection.options[:counter_cache] - reflection.options[:counter_cache].to_s - else - "#{reflection.name}_count" - end - end - def update_counter(difference, reflection = reflection()) update_counter_in_database(difference, reflection) update_counter_in_memory(difference, reflection) end def update_counter_in_database(difference, reflection = reflection()) - if has_cached_counter?(reflection) - counter = cached_counter_attribute_name(reflection) - owner.class.update_counters(owner.id, counter => difference) + if reflection.has_cached_counter? + owner.class.update_counters(owner.id, reflection.counter_cache_column => difference) end end def update_counter_in_memory(difference, reflection = reflection()) - if counter_must_be_updated_by_has_many?(reflection) - counter = cached_counter_attribute_name(reflection) + if reflection.counter_must_be_updated_by_has_many? + counter = reflection.counter_cache_column + owner[counter] ||= 0 owner[counter] += difference owner.send(:clear_attribute_changes, counter) # eww end end - # This shit is nasty. We need to avoid the following situation: - # - # * An associated record is deleted via record.destroy - # * Hence the callbacks run, and they find a belongs_to on the record with a - # :counter_cache options which points back at our owner. So they update the - # counter cache. - # * In which case, we must make sure to *not* update the counter cache, or else - # it will be decremented twice. - # - # Hence this method. - def inverse_which_updates_counter_cache(reflection = reflection()) - counter_name = cached_counter_attribute_name(reflection) - inverse_which_updates_counter_named(counter_name, reflection) - end - alias inverse_updates_counter_cache? inverse_which_updates_counter_cache - - def inverse_which_updates_counter_named(counter_name, reflection) - reflection.klass._reflections.values.find { |inverse_reflection| - inverse_reflection.belongs_to? && - inverse_reflection.counter_cache_column == counter_name - } - end - - def inverse_updates_counter_in_memory?(reflection) - inverse = inverse_which_updates_counter_cache(reflection) - inverse && inverse == reflection.inverse_of - end - - def counter_must_be_updated_by_has_many?(reflection) - !inverse_updates_counter_in_memory?(reflection) && has_cached_counter?(reflection) - end - def delete_count(method, scope) if method == :delete_all scope.delete_all @@ -175,7 +124,7 @@ module ActiveRecord def delete_records(records, method) if method == :destroy records.each(&:destroy!) - update_counter(-records.length) unless inverse_updates_counter_cache? + update_counter(-records.length) unless reflection.inverse_updates_counter_cache? else scope = self.scope.where(reflection.klass.primary_key => records) update_counter(-delete_count(method, scope)) |