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Diffstat (limited to 'guides/source')
| -rw-r--r-- | guides/source/4_0_release_notes.md | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/guides/source/4_0_release_notes.md b/guides/source/4_0_release_notes.md index 9c157ec0b3..463da488f2 100644 --- a/guides/source/4_0_release_notes.md +++ b/guides/source/4_0_release_notes.md @@ -200,6 +200,8 @@ Please refer to the [Changelog](https://github.com/rails/rails/blob/master/activ * Remove IdentityMap. +* Remove automatic execution of EXPLAIN queries. The option `active_record.auto_explain_threshold_in_seconds` is no longer used and should be removed. + * Adds `ActiveRecord::NullRelation` and `ActiveRecord::Relation#none` implementing the null object pattern for the Relation class. * Added `create_join_table` migration helper to create HABTM join tables. |