LINQ to Entities does not recognize the method 'System.TimeSpan Subtract(System.DateTime)

Question

The following throws an error:

public FieldViewer GetFieldViewByFieldIDIPAndUserByDate( int fieldID, string ip, string userID, DateTime date )
{
    return this.         


        

Answer 1

Try this to find the difference in minutes:

EntityFunctions.DiffMinutes(date, x.Viewer.CreatedAt) >= 10

Sources:

How to subtract EntityFunctions.TruncateTime from custom time

EntityFunctions.DiffMinutes

As this api is now obsolete (thanks for pointing this out @Jimmyt1988), instead use: DbFunctions.DiffMinutes