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(); }
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