Re: Direct Actions and Sessions

• Subject: Re: Direct Actions and Sessions
• From: Greg Hulands <email@hidden>
• Date: Fri, 28 Nov 2003 05:10:06 +1000

Thanks to all for your help.

I really appreciate it.

Greg

On 28/11/2003, at 1:59 AM, Colin Clark wrote:

Hi Greg,

On Thursday, November 27, 2003, at 06:43 AM, Greg Hulands wrote:

The way I will update the WO app would be something like /MyApp.woa/wa/setTitleForImage? image=uniqueImageNumber&title=newtitle.

Questions:

1. How do I get the session with a direct action as I need to get the default editing context to update the database.

If you do need to access the session from within a direct action, it's quite easy. Just call the session() method. If a session doesn't already exist, this will create a new one.

However, you don't necessarily need to use the default editing context just to do an update to the database. If you'd like to ensure that your direct actions do remain stateless, just create a new editing context in the direct action, fetch the EO that you want to update, make the save, and change. Peer editing contexts are really handy for this sort of thing.

2. How do I parse passed in parameters to the direct action, eg image and title in the above example.

The parameters are stored as form values in the request. Simply call context().request().formValueForKey(String formKey);

Here's a basic example, off the top of my head:

public WOActionResults updateImageTitleAction() {
Integer imageNum = Integer.parseInt(context().request().stringFormValueForKey("uniqueImage Number"));
String newTitleForImage = context().request().formValueForKey("title");
EOEditingContext ec = new EOEditingContext();
Image = (Image) EOUtilities.objectMatchingKeyAndValue(ec, "Image", "imageNumber", imageNum);
image.setTitle = newTitleForImage;

	ec.saveChanges();
}

Any pointers to documentation on how to use direct actions properly would be appreciated.

The JavaDocs are your friends.

For WODirectAction:
http://developer.apple.com/documentation/WebObjects/Reference/API5.2/ com/webobjects/appserver/WODirectAction.html

EOEditingContext Concepts:
http://developer.apple.com/documentation/WebObjects/Reference/API5.2/ com/webobjects/eocontrol/concepts/EOEditingContextConcepts.html

Hope that helps,

Colin

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