DevForce Community Forum : Error creating PredicateDescription

Error creating PredicateDescription : Hi kpinniger,The bug for this...

Wed, 28 Dec 2011 17:07:34 -700

Author: DenisK
Subject: 3173
Posted: 28-Dec-2011 at 5:07pm

Hi kpinniger,

The bug for this has been fixed. To clarify, the bug fix for this is a clearer exception message rather than a null ref exception.

Below is the correct way to build a predicate with a null item in the list.

var list = new short?[] { 0, 1, 2, 3 }.ToList();
var p = new PredicateDescription(typeof(Product), Product.EntityPropertyNames.UnitsInStock, FilterOperator.InList, list);
var p2 = new PredicateDescription(typeof(Product), Product.EntityPropertyNames.UnitsInStock, FilterOperator.IsEqualTo, null)
var p3 = p.Or(p2);
var q = EntityQuery.Create(typeof(Product)).Where(p3);

Error creating PredicateDescription : Note: This was moved from this...

Tue, 20 Dec 2011 12:25:18 -700

Author: DenisK
Subject: 3173
Posted: 20-Dec-2011 at 12:25pm

Note: This was moved from this post. http://www.ideablade.com/forum/forum_posts.asp?TID=2806&PID=12283#12283

Hi kpinniger;

I'm moving this to a new post as it is a different issue. I was able to duplicate this. Let me file a bug report and get back to you with a workaround if any.

FYI, the bug on the previous post was fixed in 6.1.2. Here's the description of the bug in the Release Notes.

PredicateDescriptions using ‘FilterOperator.InList’ will no longer throw an ArgumentException when used with nullable properties. [D1827]

Error creating PredicateDescription : What version was this fixed in,...

Tue, 20 Dec 2011 05:36:42 -700

Author: kpinniger
Subject: 3173
Posted: 20-Dec-2011 at 5:36am

What version was this fixed in, we are using 6.1.3. I did not see any PredicateBuilder fixes in the release notes for 6.1.4.

PredicateDescription predicate = PredicateBuilder.Make(fieldName, FilterOperator.InList, list);

If there is a null item in the list, the query.Where(predicate) will throw a null reference exception