使用EF Fluent API创建2个主键

Z时代
2024-01-10
分类：问答

我遵循这个https://mva.microsoft.com/en-us/training-courses/implementing-entity-framework-with-mvc-8931?l=mBKHDFC3_9204984382的教程。这是我的代码使用EF Fluent API创建2个主键

namespace FluentAPI 
{ 
class Program 
{ 
    static void Main(string[] args) 
    { 
     using (var context = new MusicContext()) 
     { 
      var album = new Album() { Price = 9.95m, Title = "YUhuu" }; 
      context.Albums.Add(album); 
      context.SaveChanges(); 
     } 
    } 
    public class Album 
    { 
     public int AlbumId { get; set; } 
     public string Title { get; set; } 
     public decimal Price { get; set; } 
    } 
    public class MusicContext : DbContext 
    { 
     protected override void OnModelCreating(DbModelBuilder modelBuilder) 
     { 
      modelBuilder.HasDefaultSchema("MusicStore"); 
      modelBuilder.Entity<Album>().HasKey(t => t.AlbumId); 
      //tell EF to map string into varchar 
      modelBuilder.Entity<Album>().Property(t => t.Title).IsUnicode(false); 
      //Album id not going to be identity 
      modelBuilder.Entity<Album>() 
       .Property(t => t.AlbumId) 
       .HasDatabaseGeneratedOption(DatabaseGeneratedOption.None); 
      base.OnModelCreating(modelBuilder); 
     } 
     public DbSet<Album> Albums { get; set; } 
    } 
} 
}