Added note about prefetch and has_many related objects

diff --git a/lib/DBIx/Class/Manual/Joining.pod b/lib/DBIx/Class/Manual/Joining.pod
index 3ad2064..0cf86bd 100644 (file)
--- a/lib/DBIx/Class/Manual/Joining.pod
+++ b/lib/DBIx/Class/Manual/Joining.pod
@@ -106,6 +106,11 @@ Another common use for joining to related tables, is to fetch the data
 from both tables in one query, preventing extra round-trips to the
 database. See the example above in L</WHAT ARE JOINS>.
 
+Three techniques are described here. Of the three, only the
+C<prefetch> technique will deal sanely with fetching related objects
+over a C<has_many> relation. The others work fine for 1 to 1 type
+relationships.
+
 =head2 Whole related objects
 
 To fetch entire related objects, eg CDs and all Track data, use the