Tinyint(byte),SmallInt(Int16) not compatible with Enum in EF5

Question

Using Database first design and having tinyint (or smallint) column:

[MyEnumColumn] [tinyint] NOT NULL

I mapped this column to Enum Type in EDM

Answer 1

Well if anyone is interested the problem is in enum's default type:

public enum MyEnumType 
{ One, Two, Three, All }

Since enum defaults to type int, [Underlying Type:{Byte}] doesn't match type of [External Type] {MyEnumType:Int} so to fix it for my original tinyint field you need to define your enum like this:

public enum MyEnumType : byte
{ One, Two, Three, All }

Answer 2

You need to specify both in the Model and in the Enumerator that you are using tinyInt and Byte .

in Enumerator definition public enum MyEnumType : byte { One, Two, Three, All }

then in the Model class file

 [Column(TypeName = "tinyint")]
    public MyEnumType? MyEnum { get; set; }