帶ICollection的種子數據？

Question

我有一個一對多的關係（聯繫可以有很多地址）的學校項目。但我不知道如何正確播種。

在我的數據模型中聯繫人有一個virtual ICollection<Address> Addresses，地址對象的外鍵爲ContactId。

所以這裏是我的種子數據（代碼優先）我需要這樣做，當我在搜索欄中輸入聯繫人姓氏時，它將提取該聯繫人（地址信息）上的所有信息。

那麼，我如何將我的種子數據中的信息聯繫在一起，因此當您搜索它時，會拉起它應該是什麼？

namespace Success.Data.Migrations 
{ 
    public class Seeder 
    { 
     public static void Seed(SuccessContext context, 
      bool seedContacts = true, 
      bool seedAddresses = true) 

     { 
      if (seedContacts) SeedContacts(context); 
      if (seedAddresses) SeedAddresses(context); 
     } 

     private static void SeedContacts(SuccessContext context) 
     { 
      context.Contacts.AddOrUpdate(l => l.LastName, 
       new Contact() { FullName = "Darth Vader", FirstName = "Darth", LastName = "Vader", }, 
       new Contact() { FullName = "Luke Skywalker", FirstName = "Luke", LastName = "Skywalker", }, 
       new Contact() { FullName = "Tony Stark", FirstName = "Tony", LastName = "Stark", }, 
       new Contact() { FullName = "Ricky Bobby", FirstName = "Ricky", LastName = "Bobby", }, 
       new Contact() { FullName = "Trix Rabbit", FirstName = "Trix", LastName = "Rabbit", }); 

      context.SaveChanges(); 

     } 

     private static void SeedAddresses(SuccessContext context) 
     { 
      context.Addresses.AddOrUpdate(h => h.HomeAddress, 
       new Address() { HomeAddress = "1300 DeathStar", BusinessAddress = "444 Imperial Fleet", PoBox = "PO Box 1335", ContactId = 1, }, 
       new Address() { HomeAddress = "1997 Endor", BusinessAddress = "448 Rebel Fleet", PoBox = "PO Box 1339", ContactId = 2, }, 
       new Address() { HomeAddress = "1224 Malibu Point", BusinessAddress = "657 Stark Industries", PoBox = "PO Box 1337", ContactId = 3, }, 
       new Address() { HomeAddress = "9978 Fast LN.", BusinessAddress = "532 NASCAR Race Track", PoBox = "PO Box 1333", ContactId = 4, }, 
       new Address() { HomeAddress = "9864 Cerial Box LN", BusinessAddress = "8432 Kellog Dr.", PoBox = "PO Box 1338", ContactId = 5, }); 

      context.SaveChanges(); 

     } 
    } 
} 

Answer 1

你可以有另一種方法，種子的聯繫人和地址。您將需要一個額外的if/else開關

if (seedContacts && seedAddresses) 
{ 
    SeedContactsAndAddress(context); 
} 
else 
{ 
    if (seedContacts) SeedContacts(context); 
    if (seedAddresses) SeedAddresses(context); 
} 

而且SeedContactsAndAddress方法是這樣的：

private static void SeedContactsAndAddress(StoreContext context) 
{ 
    // Each Address, which I believe is a collection in this case, but there is only 
    // one, will have to be created and added to each contact. 

    var addressesForDarthVader = new List<Address> 
    { 
     new Address { HomeAddress = "1300 DeathStar", BusinessAddress = "444 Imperial Fleet", PoBox = "PO Box 1335" } 
     // Add more addresses for Darth Vader if you need to 
    }; 

    // Rinse and repeat for the other contacts; 

    context.Contacts.AddOrUpdate(l => l.LastName, 
     new Contact() { FullName = "Darth Vader", FirstName = "Darth", LastName = "Vader", Addresses = addressesForDarthVader }, 
     new Contact() { FullName = "Luke Skywalker", FirstName = "Luke", LastName = "Skywalker", }, 
     new Contact() { FullName = "Tony Stark", FirstName = "Tony", LastName = "Stark", }, 
     new Contact() { FullName = "Ricky Bobby", FirstName = "Ricky", LastName = "Bobby", }, 
     new Contact() { FullName = "Trix Rabbit", FirstName = "Trix", LastName = "Rabbit", }); 

    context.SaveChanges(); 
}