[Jifty-commit] r2083 - jifty/trunk/lib/Jifty/Manual

jifty-commit at lists.jifty.org jifty-commit at lists.jifty.org
Sun Oct 29 22:34:37 EST 2006

Author: gugod
Date: Sun Oct 29 22:34:36 2006
New Revision: 2083


A recipie to do ajax canonicalization.

Modified: jifty/trunk/lib/Jifty/Manual/Cookbook.pod
--- jifty/trunk/lib/Jifty/Manual/Cookbook.pod	(original)
+++ jifty/trunk/lib/Jifty/Manual/Cookbook.pod	Sun Oct 29 22:34:36 2006
@@ -188,3 +188,33 @@
 In YourApp::Record define a _guess_table_name sub that doesn't
 pluralises or pluralises differently.
+=head2 How do I perform ajax canonicalization on a given field ?
+Asking user to input something in a form is really common in a web
+app. For some certain form fields you want them to have a certain
+normalized/canoncicalized form in database, and you could do a ajax
+canonicalization in Jifty very easily. Lets say your User model need a
+canonicalized C<username> field to make sure those names are n
+lowercase.  All you have to do is define a metnod named
+C<canonicalize_username> your Model class, like this:
+    package MyApp::Model::User;
+    use base qw(MyApp::Record);
+    sub canonicalize_username {
+        my $class = shift;
+        my $value = shift
+        return lc($value);
+    }
+If the form is generated by a C<Jifty::Action::Record> -based action,
+then this is all you need to do. And that is probably 90% of the case.
+C<Jifty::Action::Record> would check if there is a method named like
+C<canonicalize_fieldname> when it is rendering form fields. If found,
+related javascript code is generated.
+The ajax canonicalization happenes when the input focus leaves that
+field. You would see the effect a bit latter that the value in the
+field is changed.

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