Serialize postgres' hstore, json and array types correctly in AR update methods.

Fixes #12261. Closes #12395.

Conflicts:
	activerecord/CHANGELOG.md
	activerecord/test/cases/adapters/postgresql/array_test.rb
	activerecord/test/cases/adapters/postgresql/json_test.rb

3 files changed, 18 insertions, 0 deletions

diff --git a/activerecord/test/cases/adapters/postgresql/array_test.rb b/activerecord/test/cases/adapters/postgresql/array_test.rb
index b0870e2256..cf059d20e2 100644
--- a/activerecord/test/cases/adapters/postgresql/array_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/array_test.rb
@@ -128,6 +128,12 @@ class PostgresqlArrayTest < ActiveRecord::TestCase
     assert_equal("[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...]", record.attribute_for_inspect(:ratings))
   end
 
+  def test_update_all
+    PgArray.create! tags: ["one", "two", "three"]
+    PgArray.update_all tags: ["four", "five"]
+    assert_equal ["four", "five"], PgArray.first.tags
+  end
+
   private
   def assert_cycle field, array
     # test creation
diff --git a/activerecord/test/cases/adapters/postgresql/hstore_test.rb b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
index 2845413575..730020b5c8 100644
--- a/activerecord/test/cases/adapters/postgresql/hstore_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
@@ -206,6 +206,12 @@ class PostgresqlHstoreTest < ActiveRecord::TestCase
     def test_multiline
       assert_cycle("a\nb" => "c\nd")
     end
+
+    def test_update_all
+      Hstore.create! tags: { "one" => "two" }
+      Hstore.update_all tags: { "three" => "four" }
+      assert_equal({ "three" => "four" }, Hstore.first.tags)
+    end
   end
 
   private
diff --git a/activerecord/test/cases/adapters/postgresql/json_test.rb b/activerecord/test/cases/adapters/postgresql/json_test.rb
index c33c7ef968..10efa8b802 100644
--- a/activerecord/test/cases/adapters/postgresql/json_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/json_test.rb
@@ -121,4 +121,10 @@ class PostgresqlJSONTest < ActiveRecord::TestCase
     x = JsonDataType.first
     assert_equal "640×1136", x.resolution
   end
+
+  def test_update_all
+    JsonDataType.create! payload: { "one" => "two" }
+    JsonDataType.update_all payload: { "three" => "four" }
+    assert_equal({ "three" => "four" }, JsonDataType.first.payload)
+  end
 end