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How to implement pattern where Insert if New or Update if Exist
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ploc View Drop Down
Newbie
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Joined: 16-Jan-2012
Posts: 1 		Post Options Post Options   Quote ploc Quote  Post ReplyReply Direct Link To This Post Topic: How to implement pattern where Insert if New or Update if Exist
    Posted: 27-Aug-2012 at 10:11am
Hello,

Give an Entity key that is combination DateTime and EmployeeId (int). Is there a simply way to implement Insert if New or Update if exist? So far I think there are two choices

1. Query first to see if it exists
2. Build a save interceptor 

Seems like such a common situation so maybe an existing way to do it already exists?

Thanks,

Phat
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sbelini View Drop Down
IdeaBlade
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Joined: 13-Aug-2010
Location: Oakland
Posts: 786 		Post Options Post Options   Quote sbelini Quote  Post ReplyReply Direct Link To This Post Posted: 27-Aug-2012 at 12:02pm
Hi Phat,
 
I can't really see #2 as an option, and think #1 would be the proper way to handle it.
Remember that you need to load the entity prior to editting it, so you must query the entity. I assume you, somehow, would know the DateTime part of the composite key.
If it's not found, then you should create a new one.
 
Regards,
   Silvio.
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