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-rw-r--r--activerecord/lib/active_record/nested_attributes.rb2
-rw-r--r--activerecord/test/cases/nested_attributes_test.rb12
-rw-r--r--activerecord/test/models/pirate.rb8
3 files changed, 20 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb
index fa20bce3a9..50767ee93f 100644
--- a/activerecord/lib/active_record/nested_attributes.rb
+++ b/activerecord/lib/active_record/nested_attributes.rb
@@ -501,7 +501,7 @@ module ActiveRecord
if attributes["id"].blank?
unless reject_new_record?(association_name, attributes)
- association.build(attributes.except(*UNASSIGNABLE_KEYS))
+ association.reader.build(attributes.except(*UNASSIGNABLE_KEYS))
end
elsif existing_record = existing_records.detect { |record| record.id.to_s == attributes["id"].to_s }
unless call_reject_if(association_name, attributes)
diff --git a/activerecord/test/cases/nested_attributes_test.rb b/activerecord/test/cases/nested_attributes_test.rb
index ec01a2965d..aa519fd332 100644
--- a/activerecord/test/cases/nested_attributes_test.rb
+++ b/activerecord/test/cases/nested_attributes_test.rb
@@ -1094,3 +1094,15 @@ class TestHasManyAutosaveAssociationWhichItselfHasAutosaveAssociations < ActiveR
assert_equal ["Ship name can't be blank"], part.errors.full_messages
end
end
+
+class TestNestedAttributesWithExtend < ActiveRecord::TestCase
+ setup do
+ Pirate.accepts_nested_attributes_for :treasures
+ end
+
+ def test_extend_affects_nested_attributes
+ pirate = Pirate.create!(catchphrase: "Don' botharrr talkin' like one, savvy?")
+ pirate.treasures_attributes = [{ id: nil }]
+ assert_equal "from extension", pirate.treasures[0].name
+ end
+end
diff --git a/activerecord/test/models/pirate.rb b/activerecord/test/models/pirate.rb
index c8617d1cfe..fd5083e597 100644
--- a/activerecord/test/models/pirate.rb
+++ b/activerecord/test/models/pirate.rb
@@ -17,7 +17,13 @@ class Pirate < ActiveRecord::Base
after_remove: proc { |p, pa| p.ship_log << "after_removing_proc_parrot_#{pa.id}" }
has_and_belongs_to_many :autosaved_parrots, class_name: "Parrot", autosave: true
- has_many :treasures, as: :looter
+ module PostTreasuresExtension
+ def build(attributes = {})
+ super({ name: "from extension" }.merge(attributes))
+ end
+ end
+
+ has_many :treasures, as: :looter, extend: PostTreasuresExtension
has_many :treasure_estimates, through: :treasures, source: :price_estimates
has_one :ship