Re: Yet Another Question
Re: Yet Another Question
- Subject: Re: Yet Another Question
- From: Chuck Hill <email@hidden>
- Date: Thu, 20 Mar 2008 13:38:06 -0700
On Mar 20, 2008, at 1:33 PM, Yury Peskin wrote:
Hello List,
I have an order number in my EO and I need to have it be a unique
number.
How can I check that my users did not type in an identical number?
I’m trying to do validation and my validation right now looks like
this:
public String validateOrderNum(String value) throws
NSValidation.ValidationException
{
// Check the order number is unique
NSMutableArray args = new NSMutableArray();
Args.addObject(value);
>>>>>>EOEditingContext ec = session().defaultEditingContext();
Remove
>>>>>>Project project = EOUtilities.objectWithQualifierFormat(ec,
“Project”, “orderNum = %@”, args);
Change to
Project project =
EOUtilities.objectWithQualifierFormat(editingContext(), “Project”,
“orderNum = %@”, args);
If(project != null)
Throw new
NSValidation.ValidationException(“This number is already in use.”);
}
I keep getting “cannot find symbol” on the ec and the EOUtilities
lines.
Is there a way I can get this type of validation to work
That will leave you with a race condition. It is NOT to be depended
on. The ONLY way to be certain is to add a unique constraint in the
database and and check for failures during save changes.
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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