Entity Framework and string as NCLOB on oracle Db
I've managed to solve the issue setting the maximum string lenght into the model
public class Teacher{ public int TeacherID { get; set; } [StringLength(255, MinimumLength = 3, ErrorMessage = "My Error Message")] public string Name { get; set: } [StringLength(255, MinimumLength = 3, ErrorMessage = "My Error Message")] public string Surname{ get; set; }}Without the StringLength Orcale creates a NCLOB field that can contain up to 4Gb of data.
Note: Maximum lenght for varchar is 4000 bytes, so we cannot set more than 2000 as MaximumLenght (2 byte per character with Unicode)
Try to configure it explicitly:
protected override void OnModelCreating(DbModelBuilder modelBuilder){ modelBuilder.Entity<Teacher>().Property(x => x.Name).HasColumnType("varchar"); modelBuilder.Entity<Teacher>().Property(x => x.Surname).HasColumnType("varchar");}See Documentation