unique field in class model .net core

Riky answered on June 29, 2022 Popularity 3/10 Helpfulness 4/10

answer unique field in class model .net core

unique field in class model .net core

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//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; }

//using bulder

protected override void OnModelCreating(ModelBuilder builder)
{
    builder.Entity<User>()
        .HasIndex(u => u.Email)
        .IsUnique();
}

public class User
{
   public int UserId{get;set;}
   [StringLength(450)]
   [Index(IsUnique=true)]
   public string UserName{get;set;}
}

Popularity 3/10 Helpfulness 4/10 Language csharp

Source: Grepper

Tags: .net-core c# class field model unique

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Contributed on Jun 29 2022

Riky

0 Answers Avg Quality 2/10

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