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Re: Qualifier with key path keywords
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Re: Qualifier with key path keywords


  • Subject: Re: Qualifier with key path keywords
  • From: Chuck Hill <email@hidden>
  • Date: Mon, 25 Apr 2005 17:32:35 -0700

Pierre Bernard has some very cool qualifier extensions on his site:
http://homepage.mac.com/i_love_my/code.html

You might find what you need there or at least a good starting point.


Chuck


On Apr 25, 2005, at 4:42 PM, Greg wrote:

Hi,
I am wanting to find all the clients that have made more than 1 purchase. I have the following qualifier:


public NSArray customersWhoHaveBoughtMoreThanOnce() {
EOQualifier sales = EOQualifier.qualifierWithQualifierFormat("sales.@count > 1", null);
EOSortOrdering lName = EOSortOrdering.sortOrderingWithKey("lastName", EOSortOrdering.CompareAscending);
EOSortOrdering fName = EOSortOrdering.sortOrderingWithKey("firstName", EOSortOrdering.CompareAscending);
Object args[] = {lName, fName};

EOFetchSpecification fetchSpec = new EOFetchSpecification("Client", sales, new NSArray(args));
return theSession().defaultEditingContext().objectsWithFetchSpecification(fetc hSpec);
}


It throws an exception saying that it is a problem parsing the '@'. If I remove the '@' symbol from the qualifier it too fails as there is no count found. I read through the EOQualifier javadoc but it didn't show any examples of building a qualifier with '@', but it too didn't say whether or not it is illegal to do it.

Is it possible to use the '@' symbol in a qualifier and I'm just using it incorrectly?
Is there a better way to achieve this?


Any help is greatly appreciated.

Regards,
Greg

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