How to Specify Primary Key Name in EF-Code-First

.net c# ef-code-first entity-framework sql-server

Question

I'm using Entity Framework Codefirst to create my Database. The default Primary key with the schema name dbo.pk_Jobs seems to upset access 2007 when I connect to it over ODBC. If I manually edit the name and remove the schema name and rename this Primary Key to pk_jobs, Access can now read the table.

Can I specify the Primary Key name to not include the name of the schema using Fluent Api, Data Attributes or any other method. 

public class ReportsContext : DbContext
{
    public DbSet<Job> Jobs { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Job>().ToTable("Jobs");
        modelBuilder.Entity<Job>().HasKey(j => j.uuid);

        base.OnModelCreating(modelBuilder);
    }
}
public class Job
{
    public Guid uuid{ get; set; }
    public int active{ get; set; }
}
1
29
11/28/2012 2:36:43 PM

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Accepted Answer

If you want to specify the column name and override the property name, you can try the following:

Using Annotations

public class Job
{
    [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    [Column("CustomIdName")]
    public Guid uuid { get; set; }
    public int active { get; set; }
}

Using Code First

    protected override void OnModelCreating(DbModelBuilder mb)
    {
        base.OnModelCreating(mb);

        mb.Entity<Job>()
            .HasKey(i => i.uuid);
        mb.Entity<Job>()
          .Property(i => i.uuid)
          .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity)
          .HasColumnName("CustomIdName");
    }

Inside Migration Configuration

public partial class ChangePrimaryKey : DbMigration
{
    public override void Up()
    {
        Sql(@"exec sp_rename 'SchemaName.TableName.IndexName', 'New_IndexName', 'INDEX'");
    }

    public override void Down()
    {
        Sql(@"exec sp_rename 'SchemaName.TableName.New_IndexName', 'Old_IndexName', 'INDEX'");
    }
}
58
11/29/2012 10:17:16 AM

Popular Answer

You can use the Key attribute to specify the parts of the primary key. So your Job class might be

public class Job
{
    [Key]
    public Guid uuid{ get; set; }
    public int active{ get; set; }
}

The data annotation attributes are defined in the System.ComponentModel.DataAnnotations namespace

Chris Dunaway

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