entity framework navigation property to table in different db - entity-framework

Question

I have 2 tables in different db
db1..Towns
id
Nazv
db2..MathchedTown
id
t_id
d_name
They are joined by по Towns.id = MathchedTown.t_id
This EF classes:
[Table("Towns")]
public class Town
{
[Key]
public int id { get; set; }
public string Nazv { get; set; }
}
[Table("MathchedTown")]
public class mTown
{
[Key]
public int id { get; set; }
[Required]
public string t_id{ get; set; }
[Required]
public string d_name{ get; set; }
[ForeignKey("t_id")]
public virtual Town town { get; set; }
}
when i try to get item.town.nazv i get error:
Invalid object name 'dbo.Towns'.
If i change [Table("Towns")] to [Table("db1.dbo.Towns")], then appear almost the same error: Invalid object name 'dbo.db1.dbo.Towns'.
That all errors are SqlExceptions
How i can talk EF4 don't substite the "dbo." prefix?

Answer 1

Entity framework does not support multiple databases in a single context. But it supports multiple schemas in a single database. If you do not specify the schema it will assume dbo.
[Table("Towns", "MySchema")]
public class Town
You can specify the schema as above.
If you want to use a table in a different database you can create a view to that table in your database. But it will be read only.

Answer 2

Unfortunately EF4 does not support navigation property that is in other db.
You have two choices.
One, create a stored procedure and import it as a function in edm. And genetate complex type for the return result.
Two, create two entity models for each database. And run a query for a database then run the other query to the other database with where clause from the first query result.