UniqueAttribute.cs

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using System;

namespace Deveel.Data.Mapping {
    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
    public sealed class UniqueAttribute : ColumnConstraintAttribute, INamedConstraint {
        public UniqueAttribute(string name)
            : base(ColumnConstraints.Unique) {
            this.ConstraintName = name;
        }

        public UniqueAttribute()
            : this(null) {
        }

        public string ConstraintName { get; set; }
    }
}