[英]Asp .NET MVC - Entity Framework many to many relationship, insert data
我有模型:
public class Movie
{
[Key]
public int MovieId { get; set; }
public string Title{ get; set; }
public ICollection<Actor> Actors { get; set; }
}
public class Actor
{
[Key]
public int AtorId { get; set; }
public string Nome { get; set; }
public ICollection<Movie> Movies { get; set; }
}
和上下文:
public class MoviesContext : DbContext
{
public DbSet<Movie> Movies { get; set; }
public DbSet<Actor> Actors { get; set; }
public MoviesContext()
{
Database.SetInitializer(new DropCreateDatabaseIfModelChanges<MoviesContext>());
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Entity<Movie>().
HasMany(m => m.Actors).
WithMany(a => a.Movies).
Map(
m =>
{
m.MapLeftKey("MovieId");
m.MapRightKey("ActorId");
m.ToTable("ActorsMovies");
});
}
}
表“ ActorsMovies”已在sql服務器上創建。 如何使用實體框架將數據插入此表? 例如,要在電影表上插入數據,我使用了代碼db.Movies.Add(movie)和db.SaveChanges()}
movie.Actors.Add(actor);
db.SaveChanges();
這應該允許您更新多對多表。
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