Identity value generation can only be used with signed integer properties after upgrade to EF Core 1.1
asp.net-core asp.net-core-1.0 entity-framework-core
Question
When I updated "Microsoft.EntityFrameworkCore.Tools.DotNet" to version "1.1.0-preview4", entity framework has stopped to generate migrations.
Error:
dotnet : System.ArgumentException: Identity value generation cannot be used
for the property 'UID' on entity type 'SomeEntity' because the property type is
'Guid'. Identity value generation can only be used with signed integer properties.
Popular Answer
Solution is get rid of attribute [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
[Key]
// [DatabaseGenerated(DatabaseGeneratedOption.Identity)] <-- remove this
public Guid UID { get; set; }
and update model builder
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
// add this:
modelBuilder.Entity<SomeEntity>().Property(p => p.UID).ValueGeneratedOnAdd();
}
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