diff options
4 files changed, 20 insertions, 14 deletions
diff --git a/activerecord/lib/active_record/relation/from_clause.rb b/activerecord/lib/active_record/relation/from_clause.rb index 92340216ed..8945cb0cc5 100644 --- a/activerecord/lib/active_record/relation/from_clause.rb +++ b/activerecord/lib/active_record/relation/from_clause.rb @@ -25,7 +25,7 @@ module ActiveRecord end def self.empty - new(nil, nil) + @empty ||= new(nil, nil) end end end diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb index b86cc094fc..5635b4215b 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -54,16 +54,17 @@ module ActiveRecord end end + FROZEN_EMPTY_ARRAY = [].freeze Relation::MULTI_VALUE_METHODS.each do |name| class_eval <<-CODE, __FILE__, __LINE__ + 1 - def #{name}_values # def select_values - @values[:#{name}] || [] # @values[:select] || [] - end # end - # - def #{name}_values=(values) # def select_values=(values) - assert_mutability! # assert_mutability! - @values[:#{name}] = values # @values[:select] = values - end # end + def #{name}_values + @values[:#{name}] || FROZEN_EMPTY_ARRAY + end + + def #{name}_values=(values) + assert_mutability! + @values[:#{name}] = values + end CODE end @@ -116,8 +117,9 @@ module ActiveRecord result end + FROZEN_EMPTY_HASH = {}.freeze def create_with_value # :nodoc: - @values[:create_with] || {} + @values[:create_with] || FROZEN_EMPTY_HASH end alias extensions extending_values @@ -1190,7 +1192,7 @@ module ActiveRecord def structurally_compatible_for_or?(other) Relation::SINGLE_VALUE_METHODS.all? { |m| send("#{m}_value") == other.send("#{m}_value") } && (Relation::MULTI_VALUE_METHODS - [:extending]).all? { |m| send("#{m}_values") == other.send("#{m}_values") } && - (Relation::CLAUSE_METHODS - [:having, :where]).all? { |m| send("#{m}_clause") != other.send("#{m}_clause") } + (Relation::CLAUSE_METHODS - [:having, :where]).all? { |m| send("#{m}_clause") == other.send("#{m}_clause") } end def new_where_clause diff --git a/activerecord/lib/active_record/relation/where_clause.rb b/activerecord/lib/active_record/relation/where_clause.rb index 1f000b3f0f..2c2d6cfa47 100644 --- a/activerecord/lib/active_record/relation/where_clause.rb +++ b/activerecord/lib/active_record/relation/where_clause.rb @@ -81,7 +81,7 @@ module ActiveRecord end def self.empty - new([], []) + @empty ||= new([], []) end protected diff --git a/activerecord/test/cases/relation_test.rb b/activerecord/test/cases/relation_test.rb index 2f0382e273..03583344a8 100644 --- a/activerecord/test/cases/relation_test.rb +++ b/activerecord/test/cases/relation_test.rb @@ -43,13 +43,17 @@ module ActiveRecord (Relation::SINGLE_VALUE_METHODS - [:create_with]).each do |method| assert_nil relation.send("#{method}_value"), method.to_s end - assert_equal({}, relation.create_with_value) + value = relation.create_with_value + assert_equal({}, value) + assert_predicate value, :frozen? end def test_multi_value_initialize relation = Relation.new(FakeKlass, :b, nil) Relation::MULTI_VALUE_METHODS.each do |method| - assert_equal [], relation.send("#{method}_values"), method.to_s + values = relation.send("#{method}_values") + assert_equal [], values, method.to_s + assert_predicate values, :frozen?, method.to_s end end |