From a0482d39110860272a056593e0e5c6e2ef4d75b8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafael=20Mendon=C3=A7a=20Fran=C3=A7a?= Date: Wed, 19 Sep 2018 23:58:43 -0400 Subject: Make a deep copy of the _default_attributes in column_defaults When column_defaults is called it calls `value` on each instance of Attribute inside the _default_attributes set. Since value is memoized in the Attribute instance and that Attribute instance is shared across all instances of a model the next call to the default value will be memozied not running the proc defined by the user. Fixes #33031. --- activerecord/lib/active_record/model_schema.rb | 2 +- activerecord/test/cases/attributes_test.rb | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/activerecord/lib/active_record/model_schema.rb b/activerecord/lib/active_record/model_schema.rb index 694ff85fa1..9b985e049b 100644 --- a/activerecord/lib/active_record/model_schema.rb +++ b/activerecord/lib/active_record/model_schema.rb @@ -375,7 +375,7 @@ module ActiveRecord # default values when instantiating the Active Record object for this table. def column_defaults load_schema - @column_defaults ||= _default_attributes.to_hash + @column_defaults ||= _default_attributes.deep_dup.to_hash end def _default_attributes # :nodoc: diff --git a/activerecord/test/cases/attributes_test.rb b/activerecord/test/cases/attributes_test.rb index 3bc56694be..2632aec7ab 100644 --- a/activerecord/test/cases/attributes_test.rb +++ b/activerecord/test/cases/attributes_test.rb @@ -148,6 +148,20 @@ module ActiveRecord assert_equal 2, klass.new.counter end + test "procs for default values are evaluated even after column_defaults is called" do + klass = Class.new(OverloadedType) do + @@counter = 0 + attribute :counter, :integer, default: -> { @@counter += 1 } + end + + assert_equal 1, klass.new.counter + + # column_defaults will increment the counter since the proc is called + klass.column_defaults + + assert_equal 3, klass.new.counter + end + test "procs are memoized before type casting" do klass = Class.new(OverloadedType) do @@counter = 0 -- cgit v1.2.3