Auto-increment on partial primary key with Entity Framework Core

Question

I have declared the following model using the EF Core fluent API:

modelBuilder.Entity()
    .HasKey(p => new { p.Name, p.Id });

Answer 1

Specifying the column type as serial for PostgreSQL to generate the id.

[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
[Column(Order=1, TypeName="serial")]
public int ID { get; set; }

https://www.postgresql.org/docs/current/static/datatype-numeric.html#DATATYPE-SERIAL