在Entity Framework Core中创建非聚集索引

使用Entity Framework Core，我希望拥有一个Guid PK，而不会在数据库中出现页面碎片 。

我看过这个post和这个 。 虽然在EF6中可行，但它的完成方式似乎已经发生了变化。

是否可以在Entity Framework Core中创建非群集主键并具有其他索引？

问答答以下。

Answer 1

可以使用EntityFrameworkCore v1.0.1或更高版本。

以下代码获得所需的结果：

using System; using Microsoft.EntityFrameworkCore; using Microsoft.EntityFrameworkCore.Metadata; namespace TestApplication.Models { /// 
 /// The context class. Make your migrations from this point. /// 
 public partial class TestApplicationContext : DbContext { public virtual DbSet Companies { get; set; } public TestApplicationContext(DbContextOptions options) : base(options) { } protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { // standard stuff here... } protected override void OnModelCreating(ModelBuilder modelBuilder) { modelBuilder.Entity(entity => { entity.Property("CompanyId") .ValueGeneratedOnAdd(); entity.Property("CompanyIndex") .UseSqlServerIdentityColumn() .ValueGeneratedOnAdd(); entity.Property(e => e.CompanyName) .IsRequired() .HasColumnType("varchar(100)"); // ... Add props here. entity.HasKey(e => e.CompanyId) .ForSqlServerIsClustered(false) .HasName("PK_Company"); entity.HasIndex(e => e.CompanyIndex) .ForSqlServerIsClustered(true) .HasName("IX_Company"); }); } } /// 
 /// The model - put here for brevity. /// 
 public partial class Company { public Company() { } public Guid CompanyId { get; set; } public int CompanyIndex { get; set; } public string CompanyName { get; set; } // more props here. } } 

Project.json

 { "version": "1.0.0-*", "dependencies": { "Microsoft.EntityFrameworkCore.Design": "1.0.1", "Microsoft.EntityFrameworkCore.SqlServer": "1.0.1", "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.1", "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview3-final", "NETStandard.Library": "1.6.0" }, "tools": { "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview3-final", "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final" }, "frameworks": { "netstandard1.6": { "imports": "dnxcore50" } } }