实体框架 - 仅加载导航属性中的某些行

Question

我有课程

Address
PeopleAddress    //join table with a column called current
People           // my main table, with a IList<PeopleAddress>

modelBuilder.Entity<People>()
            .HasMany<PeopleAddress>(m => m.CurrentAddresses)
            .WithRequired()
            .HasForeignKey(m => m.PeopleId);

我（总是）只想在PeopleAddress.Current == 1的人中加载PeopleAddress。 应用程序不需要具有PeopleAddress.Current == 0的行。 我该如何实现这一目标？这可能吗？谢谢。

PS：我不能使用Include，因为在很多地方实例化了上下文，我需要在OnModelCreating(DbModelBuilder modelBuilder)

中进行

Answer 1

为此，应禁用延迟加载，以便完全控制加载哪些数据。

在PeopleAddress表上执行查询，并确保通过PeopleAddress中的导航属性加载People数据。

public virtual People People { get; set; }

PeopleAddress.Include(pa => pa.People).Where(pa => pa.Current == 1)

Answer 2

试试吧

context.People.Include("PeopleAddress")
              .Select(t=> new { t,
                                PeopleAddress= t.PeopleAddress
                                                .Where(p=>p.Current==1)});