Re: [AJAX] #script: & #html: vs #onSuccess: & #load & #html:

"Cyril Ferlicot D." <[email protected]> Sat, 24 Sep 2016 13:15:49 +0200

Newsgroups	gmane.comp.lang.smalltalk.squeak.seaside
Message-ID	<[email protected]>

Le 24/09/2016 à 08:48, Johan Brichau a écrit :
> Hi Mariano,
> 
> First button does a single ajax call and responds a js script.
> Second button does two ajax calls, first one without a response content, second one with a html response content.
> 
> Both achieve the same end result but the second one requires two request-response cycles to your server.
> The second one will thus achieve the end result slower than the first one.
> 
> We typically also try to optimize as much as possible into single ajax requests.
> 
> Mind that you _can_ combine a single primary and multiple secondary callback blocks into a single ajax call. 
> A primary callback is a callback that responds a content to the client (#script:, #html:, #json:, #text, ….)
> A secondary callback is a callback that does not respond content (#callback:value:, #callback:passengers:, #callback:json: , …)
> There is an exception to this rule, #callback: is implemented in the Seaside jQuery binding as a primary callback, even if it does not return any content.
> 
> Although for this example, I would actually write it as follows, because the #callback: block is a primary callback.
> 
> 		html button
> 			bePush; 
> 			onClick: (html jQuery id: ‘myDivId’ load html: [:r | | … do some other stuff …. then ... self renderMyDivOn: r.  ] ) 
> 			value: ‘Test’
> 

Hi!

With this example how is manage the case where the session expire?
In general I do:

onClick: (html jQuery ajax
	callback: [  ];
	onSuccess: (  (html jQuery id: 'myDivId') load html: [ :r | self
renderMyDivOn: r.  ]);
	onError: 'location.reload();' "probably session expiration");

> Now, it also depends of the ‘myDivId’ is known when rendering the button or not, but in this simple example this would yield the same result ;)
> 
> cheers
> Johan
> 
> 
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-- 
Cyril Ferlicot

http://www.synectique.eu

2 rue Jacques Prévert 01,
59650 Villeneuve d'ascq France

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