diff options
Diffstat (limited to 'activerecord/lib/active_record/associations.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations.rb | 48 |
1 files changed, 33 insertions, 15 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index 81a42e22f3..499b00a815 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -145,20 +145,14 @@ module ActiveRecord autoload :AliasTracker, 'active_record/associations/alias_tracker' end - # Clears out the association cache. - def clear_association_cache #:nodoc: - @association_cache.clear if persisted? - end - - # :nodoc: - attr_reader :association_cache - # Returns the association instance for the given name, instantiating it if it doesn't already exist def association(name) #:nodoc: association = association_instance_get(name) if association.nil? - raise AssociationNotFoundError.new(self, name) unless reflection = self.class._reflect_on_association(name) + unless reflection = self.class._reflect_on_association(name) + raise AssociationNotFoundError.new(self, name) + end association = reflection.association_class.new(self, reflection) association_instance_set(name, association) end @@ -166,7 +160,31 @@ module ActiveRecord association end + def association_cached?(name) # :nodoc + @association_cache.key?(name) + end + + def initialize_dup(*) # :nodoc: + @association_cache = {} + super + end + + def reload(*) # :nodoc: + clear_association_cache + super + end + private + # Clears out the association cache. + def clear_association_cache # :nodoc: + @association_cache.clear if persisted? + end + + def init_internals # :nodoc: + @association_cache = {} + super + end + # Returns the specified association instance if it responds to :loaded?, nil otherwise. def association_instance_get(name) @association_cache[name] @@ -1014,7 +1032,7 @@ module ActiveRecord # record(s) being removed so that callbacks are run. However <tt>delete</tt> and <tt>delete_all</tt> will either # do the deletion according to the strategy specified by the <tt>:dependent</tt> option, or # if no <tt>:dependent</tt> option is given, then it will follow the default strategy. - # The default strategy is <tt>:nullify</tt> (set the foreign keys to <tt>nil</tt>), except for + # The default strategy is to do nothing (leave the foreign keys with the parent ids set), except for # +has_many+ <tt>:through</tt>, where the default strategy is <tt>delete_all</tt> (delete # the join records, without running their callbacks). # @@ -1386,7 +1404,7 @@ module ActiveRecord # has_one :last_comment, -> { order 'posted_on' }, class_name: "Comment" # has_one :project_manager, -> { where role: 'project_manager' }, class_name: "Person" # has_one :attachment, as: :attachable - # has_one :boss, readonly: :true + # has_one :boss, -> { readonly } # has_one :club, through: :membership # has_one :primary_address, -> { where primary: true }, through: :addressables, source: :addressable # has_one :credit_card, required: true @@ -1438,7 +1456,7 @@ module ActiveRecord # when you access the associated object. # # Scope examples: - # belongs_to :user, -> { where(id: 2) } + # belongs_to :firm, -> { where(id: 2) } # belongs_to :user, -> { joins(:friends) } # belongs_to :level, ->(level) { where("game_level > ?", level.current) } # @@ -1514,11 +1532,11 @@ module ActiveRecord # belongs_to :valid_coupon, ->(o) { where "discounts > ?", o.payments_count }, # class_name: "Coupon", foreign_key: "coupon_id" # belongs_to :attachable, polymorphic: true - # belongs_to :project, readonly: true + # belongs_to :project, -> { readonly } # belongs_to :post, counter_cache: true - # belongs_to :company, touch: true + # belongs_to :comment, touch: true # belongs_to :company, touch: :employees_last_updated_at - # belongs_to :company, required: true + # belongs_to :user, required: true def belongs_to(name, scope = nil, options = {}) reflection = Builder::BelongsTo.build(self, name, scope, options) Reflection.add_reflection self, name, reflection |