Merge pull request #39 from shuangela/DOCSP-42363-new-caching-behavior

[DOCSP-42363] Add New Caching Behavoir

Author: shuangela

.gitignore

@@ -1,5 +1,4 @@
 .DS_Store
 giza.log
-source*
 build/
 .yardoc

source/release-notes/mongoid-8.0.txt

@@ -824,3 +824,14 @@ Support for individually caching criteria objects has been dropped in Mongoid 8.
 
 In order to get caching functionality, enable the Mongoid Query Cache. See the
 section on :ref:`Query Cache <query-cache>` for more details.
+
+New Caching Behavior of ``<association>_ids`` Methods
+-----------------------------------------------------
+
+If you call an ``<association>_ids`` method, such as ``member_ids``, on an
+association previously loaded into memory, Mongoid 8.0 uses the in-memory collection to satisfy the query
+instead of issuing a new query to the database.
+
+To force an ``<association>_ids`` method to issue a new database query,
+you can either reset the association or reload the parent record.
+