diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/belongs_to_association.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/belongs_to_association.rb | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/associations/belongs_to_association.rb b/activerecord/lib/active_record/associations/belongs_to_association.rb index 11a89366aa..3346725f2d 100644 --- a/activerecord/lib/active_record/associations/belongs_to_association.rb +++ b/activerecord/lib/active_record/associations/belongs_to_association.rb @@ -34,14 +34,28 @@ module ActiveRecord @updated end - def decrement_counters # :nodoc: + def decrement_counters update_counters(-1) end - def increment_counters # :nodoc: + def increment_counters update_counters(1) end + def decrement_counters_before_last_save + if reflection.polymorphic? + model_was = owner.attribute_before_last_save(reflection.foreign_type).try(:constantize) + else + model_was = klass + end + + foreign_key_was = owner.attribute_before_last_save(reflection.foreign_key) + + if foreign_key_was && model_was < ActiveRecord::Base + update_counters_via_scope(model_was, foreign_key_was, -1) + end + end + def target_changed? owner.saved_change_to_attribute?(reflection.foreign_key) end @@ -61,10 +75,19 @@ module ActiveRecord def update_counters(by) if require_counter_update? && foreign_key_present? - reader.increment!(reflection.counter_cache_column, by, touch: reflection.options[:touch]) + if target && !stale_target? + target.increment!(reflection.counter_cache_column, by, touch: reflection.options[:touch]) + else + update_counters_via_scope(klass, owner._read_attribute(reflection.foreign_key), by) + end end end + def update_counters_via_scope(klass, foreign_key, by) + scope = klass.unscoped.where!(primary_key(klass) => foreign_key) + scope.update_counters(reflection.counter_cache_column => by, touch: reflection.options[:touch]) + end + def find_target? !loaded? && foreign_key_present? && klass end @@ -74,11 +97,11 @@ module ActiveRecord end def replace_keys(record) - owner[reflection.foreign_key] = record ? record._read_attribute(primary_key(record)) : nil + owner[reflection.foreign_key] = record ? record._read_attribute(primary_key(record.class)) : nil end - def primary_key(record) - reflection.association_primary_key(record.class) + def primary_key(klass) + reflection.association_primary_key(klass) end def foreign_key_present? |