MVC :: Entity / Getting An Error Indicating That There Is No Key For A Table?
Jan 20, 2011
I am working through the MVC Music Store example that is listed on this site. I am also trying to create my own MVC application in which I have several tables defined in a very similar way to the music store.
When I am defining my Models and running the application I am getting an error indicating that there is no key for a table that I know has a key. For example
Table1
int Id
string fld1
int Table2_id
Table2
int Id
string fldxyz
Code:
public class Table1
{
public int Id;
public string fld1;
public int Table2_id;
public Table2 table2;
}
public class Table2
{
public int Id;
public string Fldxyz
}
of course the Id fields on the database are setup as being the key fields and are unique. When I run the application I am getting an error indicating the Table2 doesn't have a key and that it needs to be defined.
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using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
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[Code]....
But I keep getting a design time error:
Error 1 'System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<MyApp.Models.PersonalData>' does not contain a definition for 'MapSingleType' and no extension method 'MapSingleType' accepting a first argument of type 'System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<Myapp.Models.PersonalData>' could be found (are you missing a using directive or an assembly reference?)
[Code]....
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