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DirectAction Creation On The Fly
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DirectAction Creation On The Fly


  • Subject: DirectAction Creation On The Fly
  • From: "Jonathan Fleming" <email@hidden>
  • Date: Thu, 21 Oct 2004 13:10:45 +0100

Is it possible to create a direct action on the fly? Probably yes which'll mean I'm doing things back to front as usual.

At the moment anytime the user wants to add a navigational page to their app I have to do it by adding the directAction and then rebuild the app so they can then use it but this defeats the purpose of object orientation doesn't it?

What I have managed so far, is to create one directAction called navPage_ and I was hoping I could then do a database find to get the name of the page it should pull out and show, only I'm stuck on finding a way to get that name in to or out of the request - any ideas.

Here's what I am trying to do so far:
In the direct action I have a programmatic find and what I have been trying to do is send in a url similar to this: http://silver-back/wo-scripts/WebObjects.exe/UKCHP.woa/-9797/wa/navPage_###courseYear1Certificate
of which I was hoping to extract "courseYear1Certificate" from the url, this would be the page name. I use the 3 ### signs because I can get the direct action to work as navPage_ without it reading beyond the ### signs. I was therefore hoping that using a subString method would allow me to get anything after the 3 hash signs which could include a proper anchor name link.
Only I can not seem to get the full url into the request so I can read the full url.


The code in the directAction below works on a StringIndexOutOfBoundsException because It has a name to get from the database, if I can get this from the url all would be well.


public WOActionResults navPage_Action () {
NavPage_General aPage = (NavPage_General)pageWithName ("NavPage_General");


String urlQuery = context().request().uri();
NSLog.out.appendln("===\r The urlQueryString is = ‘" + urlQuery + "‘");
String extractedDA;
int urlStartOfDA=0;
int urlEndOfDA=0;
try {
urlStartOfDA = urlQuery.lastIndexOf("_"); //ignore code pertaining to this for now
urlEndOfDA = urlQuery.lastIndexOf("###" );
extractedDA = urlQuery.substring(urlEndOfDA).trim();
NSLog.out.appendln(" extractedDA: " + extractedDA+"\r"+
" urlStartOfDA: " + urlEndOfDA+" urlStartOfDA: " + urlEndOfDA);
}
catch (StringIndexOutOfBoundsException siofbEx) {
extractedDA = "About UKCHP";
NSLog.out.appendln(" failed extractedDA: " + extractedDA+"\r"+
" urlStartOfDA: " + urlEndOfDA+" urlEndOfDA: " + urlEndOfDA);
NSLog.out.appendln( "===\r StringIndexOutOfBoundsException message: "+ siofbEx.getMessage() );
}
/*-------------------------------------------------------------------------------*/
/*---------------- Start Of Progmatically Created Fetch Spec ----------------*/
String navPageName = extractedDA;
String visibility = "On";
/*------------- end local variables & start qualifier bindings --------------*/
NSArray bindings = new NSArray( new Object [] { navPageName, visibility } );
EOQualifier qualifier =
EOQualifier.qualifierWithQualifierFormat("((tbNavPage.navPageName = %@) and (visibility= %@))", bindings );
NSLog.out.appendln("\n*** bindings = " + bindings + "\n" + " qualifier " + qualifier);


..... rest of programmatic fetch and other statements
 }

TIA
Jonathan :^)

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