[Jifty-commit] r2866 - in jifty/trunk: .

[jifty-commit at lists.jifty.org]

Author: sterling
Date: Wed Feb 28 10:34:16 2007
New Revision: 2866

Modified:
   jifty/trunk/   (props changed)
   jifty/trunk/lib/Jifty/Manual/Cookbook.pod

Log:
added mutual dependencies recipe

Modified: jifty/trunk/lib/Jifty/Manual/Cookbook.pod
==============================================================================
--- jifty/trunk/lib/Jifty/Manual/Cookbook.pod	(original)
+++ jifty/trunk/lib/Jifty/Manual/Cookbook.pod	Wed Feb 28 10:34:16 2007
@@ -321,3 +321,30 @@
 
 Check details from Angus himself. ( http://www.twinhelix.com/ )
 
+=head2 Create mutually dependent models
+
+Sometimes you need two tables that both depend upon each other. That is, you have model A that needs to have a column pointing to Model B and a column in Model B pointing back to model A. The solution is very straight forward, just make sure you setup the base class I<before> you load dependent model and this will just work. For example:
+
+  package ModelA;
+  use base qw/ MyApp::Record /;
+
+  # Note that "use base..." comes first
+  use ModelB;
+
+  use Jifty::DBI::Schema;
+  use MyApp::Record schema {
+    column b_record => refers_to ModelB;
+  };
+
+  package ModelB;
+  use base qw/ MyApp::Record /;
+
+  # Note that "use base..." comes first
+  use ModelA;
+
+  use Jifty::DBI::Schema;
+  use MyApp::Record schema {
+    column a_record => refers_to ModelA;
+  };
+
+Otherwise, everything should work as expected.