TPH和知识库 [英] TPH and the Repository
问题描述
假设我有一个模型，我有联系人，人和公司。人和公司都来自联系人。
Let's say i have a model where I have Contact, Person and Company. Person and Company both derive from Contact.
在我的存储库中，我试图有三个公开的集合，如下所示：
On my repository, i am trying to have three exposed collections like this :
public DbSet<Contact> Contacts { get; set; }
public DbSet<Person> Persons { get; set; }
public DbSet<Company> Companies { get; set; }此外也是这样的映射对于TPH：
Also mapping like this for a TPH:
modelBuilder.Entity<Contact>().Map<Person>(map=>map.MapInheritedProperties());
modelBuilder.Entity<Contact>().Map<Company>(map => map.MapInheritedProperties());生成的数据库模式生成三个表，两个只有和ID，一个Discrimantaor和Contact表......这是应该发生的吗？
The generated database schema generates three tables, two with only and ID and a Discrimantaor and the the Contact table... Is this what is supposed to be happening ?
推荐答案
我在想，Contact类可能是抽象的？如果是，那么你可以尝试这个来获得TPH
I am thinking Contact class is probably abstract? If it is then u can try this to get TPH
modelBuilder.Entity< Contact>（）。ToTable（" Contacts"）;
modelBuilder.Entity<Contact>().ToTable("Contacts");
&NBSP; &NBSP; &NBSP; &NBSP; modelBuilder.Entity< Person>（）。Map（mc => mc.Requires（" Type"）。HasValue（" Person"））;
modelBuilder.Entity<Person>().Map(mc => mc.Requires("Type").HasValue("Person"));
; &NBSP; &NBSP; &NBSP; &NBSP; modelBuilder.Entity< Company>（）。Map（mc => mc.Requires（" Type"）。HasValue（" Company"））;
modelBuilder.Entity<Company>().Map(mc => mc.Requires("Type").HasValue("Company"));
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