ATK 101

2006-04-17T10:08:30Z

213.25.55.153: /* General Documentation */

== General Documentation ==

[[InstallationGuide]]

[[atkMetaNode]]

[[System Requirements]]

[[Localization]]

== Modules ==

An ATK Application consists of one or more modules.

A [[CompleteModuleFile]]

== Nodes ==

A module consists of one or more nodes. ATK knows 3 node types: [[atkNode]], [[atkTreeNode]] and [[atkMetaNode]]

An [[ExampleNode]] file.

[[NodeFlags]]

== Attributes ==

A node is build with attributes.

[[AttributesExplained]]

[[AttributeFlags]]

[[AttributeLevelSecurity]]

== Sessions ==

Application state is remembered in sessions.

[[SessionVariables]]

== Advanced techniques ==

[[Polymorphism]]

== Misc Tips ==

[[OrderingAttributesWithinANode]]<br />
[[SmartDebug]]<br />
[[Handy features]]

Polymorphism

2006-04-09T02:38:45Z

213.25.55.153:

An example of polymorphism is given in a question that was sent to the mailinglist:
<pre>
> Can I override view/edit action to go to other node? Say I have a node
> called Main which display part of table Main. Edit and View button
> should go to certain nodes based on particular attribute's value in
> node Main.
</pre>
The best way to accomplish this is to override the link of the edit icon for a record, and have it link to another node instead of the current one.

Try to add the following to your main node:
<pre>
function recordActions($record, &$actions, &$mraactions)
{
switch($record[["type"])
{
case "fruit":
$actions[["edit"] = dispatch_url("yourmodule.fruit", "edit");
$actions[["view"] = dispatch_url("yourmodule.fruit", "view");
break;
case "car":
$actions[["edit"] = dispatch_url("yourmodule.car", "edit");
$actions[["view"] = dispatch_url("yourmodule.car", "view");
break;
default:
// do nothing, this will result in the default edit links.
}
}
</pre>
If the 'fruit' and 'car' nodes are derived from the 'main' node (which only contains the fields that are both applicable to cars and fruit), this is a very nice way to achieve polymorphism.

Original Poster: Ivo

NusaATK - User contributions [en]

ATK 101

Polymorphism