Error 3004, mapping error with EF

Question

Ok since my of my issues have been resolved,I was flying through the code, until now: I've now run into one I cant even find anything on Google for it. Here's the text of the error:

Error 3004: Problem in mapping

fragments starting at line 937:No mapping specified for properties StoreItem.ItemPrice in Set StoreItems. An Entity with Key (PK) will not round-trip when: Entity is type [psychoco_GodsCreationTaxidermyModel.StoreItem] F:\Projects\GodsCreationTaxidermySVN\GodsCreationTaxidermy.Data\GCTEntities.edmx 938 945 GodsCreationTaxidermy.Data

Of you need any code samples let me know

Answer 1

The error means that your table imported to the model contains additional column ItemPrice which is not mapped to your entity.

Answer 2

I ran into the same error, using the database first approach. The cause was that when I added an association through the designer, EF decided to add a synthetic field to my principal, based on whatever key relationship I had defined. If you are doing database first, check if ItemPrice on StoreItem is a real database field, or if EF just decided to generate it for you.