Question

I’m trying to pull out an object from a DbSet with a Linq query.

I use the syntax:

Nation nation = nationDB.Nations.Where(c => c.ID == testNation.ID).First();

I get the following exception:

LINQ to Entities does not recognize the method ‘Nation get_Item(Int32)’ method, and this
method cannot be translated into a store expression.

The class Nation has a couple of string fields, one int field (the ID) and a couple of other objects as fields.

What can the problem be?

Answer 1

You need to pull out the integer first because there is no appropriate translation for retrieving the integer from your object Nation within the Linq to Entities scope:

int testId = testNation.ID;
Nation nation = nationDB.Nations.Where(c => c.ID == testId).SingleOrDefault();