Add support for Postgresql JSONB

[Philippe Creux, Chris Teague]

1 files changed, 23 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb
new file mode 100644
index 0000000000..34ed32ad35
--- /dev/null
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb
@@ -0,0 +1,23 @@
+module ActiveRecord
+  module ConnectionAdapters
+    module PostgreSQL
+      module OID # :nodoc:
+        class Jsonb < Json # :nodoc:
+          def type
+            :jsonb
+          end
+
+          def changed_in_place?(raw_old_value, new_value)
+            # Postgres does not preserve insignificant whitespaces when
+            # roundtripping jsonb columns. This causes some false positives for
+            # the comparison here. Therefore, we need to parse and re-dump the
+            # raw value here to ensure the insignificant whitespaces are
+            # consitent with our encoder's output.
+            raw_old_value = type_cast_for_database(type_cast_from_database(raw_old_value))
+            super(raw_old_value, new_value)
+          end
+        end
+      end
+    end
+  end
+end