Fix interactions between :before_add callbacks and nested attributes assignment

Issue #1: :before_add callback is called when nested attributes assignment assigns to existing record if the association is not yet loaded
Issue #2: Nested Attributes assignment does not affect the record in the association target when callback triggers loading of the association

1 files changed, 14 insertions, 1 deletions

diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 3010f42cd6..6b3e5df1a7 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,5 +1,18 @@
+*   Fix interactions between `:before_add` callbacks and nested attributes
+    assignment of `has_many` associations, when the association was not
+    yet loaded:
+
+    - A `:before_add` callback was being called when a nested attributes
+      assignment assigned to an existing record.
+
+    - Nested Attributes assignment did not affect the record in the
+      association target when a `:before_add` callback triggered the
+      loading of the association
+
+    *Jörg Schray*
+
 *   Allow enable_extension migration method to be revertible.
- 
+
     *Eric Tipton*
 
 *   Type cast hstore values on write, so that the value is consistent