This expression type is not supported in LightSpeed 3.0

Hi,

I tried to use this library: http://www.albahari.com/nutshell/predicatebuilder.aspx

When he deferred execution happens I got this message "This expression type is not supported in LightSpeed 3.0" 

Here are the steps to repro:

IQueryable<Customer> custs = new Customer().SearchCustomers("Joe", "Blog");

...

public IQueryable<Customer> SearchCustomers(string firstName, string lastName)

        {

            var predicateBuilder = PredicateBuilder.False<Customer>();

            LightSpeedContext<AppTier.ModelUnitOfWork> _context = new LightSpeedContext<AppTier.ModelUnitOfWork>("Development");

            _context.Logger = new Mindscape.LightSpeed.Logging.TraceLogger();

            using (var unitOfWork = _context.CreateUnitOfWork())

            {

                predicateBuilder = predicateBuilder.Or(c => c.FirstName.Contains(firstName));

                predicateBuilder = predicateBuilder.Or(c => c.LastName.Contains(lastName));

                return unitOfWork.Customers.Where(predicateBuilder);

            } 

        }

Could you take a look at this for me and let me know if its something that you can fix?

The problem is in the LightSpeed.Lin.dll, something about:  'Anonymously Hosted DynamicMethods Assembly'

Cheers,

Hi Jeremy,

We are up at TechEd NZ currently, but I will try and have a look at this today if possible and provide some feedback on this :)

Jeremy

Hi Jeremy,

Back from TechEd now, and I noticed Ivan has actually already looked into this type of thing before. The problem stems from the use of Expression.Invoke in Joes default PredicateBuilder implementation, if you have a look at this post: http://www.mindscape.co.nz/forums/Post.aspx?ThreadID=3232&PostID=10722 you can make a fairly simple change to remove Expression.Invoke from the And/Or methods which removes the unsupported aspect from the query.

Jeremy

Hi,

Awesome, its already fixed!

Cheers,

ps I'm sure you guys rocked TechEd NZ:)