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Re: Question about EOs and their lifespan/uniqueness
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Re: Question about EOs and their lifespan/uniqueness


  • Subject: Re: Question about EOs and their lifespan/uniqueness
  • From: Chuck Hill <email@hidden>
  • Date: Mon, 5 Nov 2007 12:26:39 -0800


On Nov 5, 2007, at 12:14 PM, Kevin Windham wrote:

I am running into a problem that I think may be related to the way EOs are created/managed in memory. I have an object that I pass in to a component. That object has some boolean variables that are not backed by the DB. They are simply declared in the class file, public boolean boolvar;

If I set this variable and then display the page with a checkbox bound to this variable it shows the correct state. If I leave the page and go back to it then the state of the checkbox always reverts to false.

It seems like I am getting a newly created object instead of the one that was already created.

That is what it sounds like to me as well.


Other variables that are DB backed seem fine. Is this normal? Do EOs get created and destroyed regularly, and can I not rely on getting the same object instance if one was already fetched and created in memory? Or, am I barking up the wrong tree and something else is going on?

Each editing context gets its own instance (as in Java object instance) of the EO. If you only use one editing context you will see that the value is maintained. The other options is to use some sort of notification scheme to synchronize these values across all instances of the EO.


Chuck


--

Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
http://www.global-village.net/products/practical_webobjects






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 >Question about EOs and their lifespan/uniqueness (From: Kevin Windham <email@hidden>)

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