Identity specification set to false

Question

I am using EF5 and Code First to create database. When Entity has Id field, EF create such field as Primary Key in databa

Answer 1

If you don't want to use identity keys you have several options.

Option 1: You can globally turn off this feature by removing StoreGeneratedIdentityKeyConvention:

public class YourContext : DbContext {
    protected override void OnModelCreating(DbModelBuilder modelBuilder) {
        modelBuilder.Conventions.Remove<StoreGeneratedIdentityKeyConvention>();
    }
}

You can selectively select keys and change the behavior for them by either applying attribute or fluent mapping.

Option 2: Attribute:

public class MyEntity {
    [DatabaseGenerated(DatabaseGeneratedOption.None)]
    public int Id { get; set; }        
}

Option 3: Fluent API:

public class YourContext : DbContext {
    protected override void OnModelCreating(DbModelBuilder modelBuilder) {
        modelBuilder.Entity<MyEntity>()
                    .Property(e => e.Id)
                    .HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);
    }
}