ef code first unique constraint
//single index
[Index("IX_First", IsUnique = true)]
public int FirstColumn { get; set; }
// composite index
[Index("IX_FirstAndSecond", 1, IsUnique = true)]
public int FirstColumn { get; set; }
[Index("IX_FirstAndSecond", 2, IsUnique = true)]
public int SecondColumn { get; set; }how to set unique constraint from EF core
protected override void OnModelCreating(ModelBuilder builder)
{
builder.Entity<User>()
.HasIndex(u => u.Email)
.IsUnique();
}Copyright © 2021 Codeinu
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