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DanOve View Drop Down
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Joined: 20-Sep-2013
Posts: 3 		Post Options Post Options   Quote DanOve Quote  Post ReplyReply Direct Link To This Post Topic: Linq anonymous type sub collection query
    Posted: 16-Jan-2014 at 3:49am
Hi Kimj

Any news or release date?


/Dan Ove
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kimj View Drop Down
IdeaBlade
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Joined: 09-May-2007
Posts: 1391 		Post Options Post Options   Quote kimj Quote  Post ReplyReply Direct Link To This Post Posted: 06-Dec-2013 at 8:07am
We've added a new bug report for the issue, but I don't have any information yet on when, or if, it will be fixed.
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DanOve View Drop Down
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Posts: 3 		Post Options Post Options   Quote DanOve Quote  Post ReplyReply Direct Link To This Post Posted: 05-Dec-2013 at 11:20pm
Hi Kimj

Thanks for your answer. Do you plan to support nested anonymous projection? It's super useful for querying large linked tables and optimize performance.

Dan Ove
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IdeaBlade
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Posts: 1391 		Post Options Post Options   Quote kimj Quote  Post ReplyReply Direct Link To This Post Posted: 05-Dec-2013 at 11:09am

The bug is marked as fixed, although it looks like the defect report didn't accurately describe the situation, as I see the exception still too.  For now, the workaround is a CacheOnly query as described above, or removing the nested anonymous projection (on VehicleModels in the query above).
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DanOve View Drop Down
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Posts: 3 		Post Options Post Options   Quote DanOve Quote  Post ReplyReply Direct Link To This Post Posted: 05-Dec-2013 at 12:09am
Hi.

I get the same exception when I try running this example in DevForce 2012.
Is this bug really fixed?

Best Regards

Dan Ove
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sbelini View Drop Down
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Posts: 786 		Post Options Post Options   Quote sbelini Quote  Post ReplyReply Direct Link To This Post Posted: 10-May-2011 at 12:47pm
Hi Tersius,
 
Try running the query against the CacheOnly. (You will need to load all VehiclesMakes and VehicleModels in the cache first - but that you do with your query anyhow)
 
Silvio.


Edited by sbelini - 10-May-2011 at 12:52pm
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tersiusk View Drop Down
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Posts: 20 		Post Options Post Options   Quote tersiusk Quote  Post ReplyReply Direct Link To This Post Posted: 10-May-2011 at 12:04am
Hi

Thanks. In the meantime is there any other way I can get the same sort of results? 

edit: It seems to work if you use a concrete type.

Regards


Edited by tersiusk - 10-May-2011 at 2:13am
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Posts: 786 		Post Options Post Options   Quote sbelini Quote  Post ReplyReply Direct Link To This Post Posted: 09-May-2011 at 3:57pm
Hi Tersius,
 
I have verified and this is indeed a bug.
We have already filed a bug and I will let you know as soon as we have a fix for it.
 
Regards,
Silvio.
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tersiusk View Drop Down
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Posts: 20 		Post Options Post Options   Quote tersiusk Quote  Post ReplyReply Direct Link To This Post Posted: 09-May-2011 at 5:49am
Hi I'm trying to execute the following query but the result has the following error.

Also when I run this with normal entity framework the code executes and results are fine. Is this a bug? If so are there any kind of work around you can suggest?

"Unable to cast object of type 'System.Object[]' to type 'System.Collections.Generic.IEnumerable`1[<>f__AnonymousType0`3[System.Int64,System.String,System.String]]'."
 var query = (EntityQuery)(from makes in em.VehicleMakes
                                      orderby makes.MakeName
                                      select new
                                      {
                                          Key = makes.VehicleMakeId,
                                          Name = makes.MakeName,
                                          Description = makes.MakeCode,
                                          Children = from model in makes.VehicleModels
                                                     select new
                                                     {
                                                         Key = model.VehicleModelId,
                                                         Name = model.ModelName,
                                                         Description = model.ModelCode
                                                     }
                                      });


Edited by tersiusk - 09-May-2011 at 6:22am
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