How to tell Entity Framework that my ID column is auto-incremented (AspNet Core 2.0 + PostgreSQL)?

Question

Code is simple. Tag.cs entity:

public partial class Tag
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int Id { ge         


        

Answer 1

According to the Postgre SQL docs here is an example which shows how to achieve the desired result:

protected override void OnModelCreating(ModelBuilder modelBuilder)
   => modelBuilder.Entity().Property(b => b.Id).UseIdentityAlwaysColumn();