March 2010
11 posts
NHibernate QueryOver
It’s a small thing but I’m really looking forward to NHibernate 3.0 with QueryOver.
Oooooo I can’t wait until this is out RT @CrypticAlivet: This gave me chills: http://bit.ly/cyDtvI
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Marcus Starnes .digital photography →
The last few photos were taken from a good friend’s site and personal collection.
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Invalid index N for this SqlParameterCollection...
Well I have run into this a few times in the past, however as always I forget what the error meant. I googled as usual and found a guy called Derik Whittaker describing exactly the same issue, however his fix was to do with the foreign key as well as the mapped object. Now my mappings didn’t have the duplicate foreign keys so I went off for a while trying to work out what the problem...
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NHibernate - Unexpected row count: 0; expected: 1
Using NHibernate I get this now and again and I always forget why. The reason is often because it doesn’t know that an item you have added should be auto saved, make sure you double check the unsaved-value attribute and that when your class has the correct default value, basically the same as your unsaved-value attribute.
Simple really but hopefully it will save someone some heartache...