ServiceStack.OrmLite 笔记9 -code first 必须的代码优先

复杂点的使用3

---

code first的使用，支持复杂类型
public enum PhoneType {
Home,
Work,
Mobile,
}

public enum AddressType {
Home,
Work,
Other,
}

public class Address {
public string Line1 { get; set; }
public string Line2 { get; set; }
public string ZipCode { get; set; }
public string State { get; set; }
public string City { get; set; }
public string Country { get; set; }
}

public class Customer {
public Customer() {
this.PhoneNumbers = new Dictionary<PhoneType, string>();
this.Addresses = new Dictionary<AddressType, Address>();
}

[AutoIncrement] // 创建自增长主键
public int Id { get; set; }

public string FirstName { get; set; }
public string LastName { get; set; }

[Index(Unique = true)] // 创建索引
public string Email { get; set; }

public Dictionary<PhoneType, string> PhoneNumbers { get; set; }  //Blobbed
public Dictionary<AddressType, Address> Addresses { get; set; }  //Blobbed
public DateTime CreatedAt { get; set; }

}

public class Order {

[AutoIncrement]
public int Id { get; set; }

[References(typeof(Customer))]      //外键
public int CustomerId { get; set; }

[References(typeof(Employee))]      //Creates Foreign Key
public int EmployeeId { get; set; }

public Address ShippingAddress { get; set; } //Blobbed (no Address table)

public DateTime? OrderDate { get; set; }
public DateTime? RequiredDate { get; set; }
public DateTime? ShippedDate { get; set; }
public int? ShipVia { get; set; }
public decimal Freight { get; set; }
public decimal Total { get; set; }

}

public class OrderDetail {

[AutoIncrement]
public int Id { get; set; }

[References(typeof(Order))] //Creates Foreign Key
public int OrderId { get; set; }

public int ProductId { get; set; }
public decimal UnitPrice { get; set; }
public short Quantity { get; set; }
public decimal Discount { get; set; }

}

public class Employee {
public int Id { get; set; }
public string Name { get; set; }
}

public class Product {
public int Id { get; set; }
public string Name { get; set; }
public decimal UnitPrice { get; set; }
}

//Setup SQL Server Connection Factory
var dbFactory = new OrmLiteConnectionFactory(
@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\App_Data\Database1.mdf;Integrated Security=True;User Instance=True",
SqlServerDialect.Provider);

//Use in-memory Sqlite DB instead
//var dbFactory = new OrmLiteConnectionFactory(
// ":memory:", false, SqliteDialect.Provider);

//Non-intrusive: All extension methods hang off System.Data.* interfaces
using (IDbConnection db = Config.OpenDbConnection())
{
//Re-Create all table schemas:
db.DropTable();
db.DropTable();
db.DropTable();
db.DropTable();
db.DropTable();

db.CreateTable();
db.CreateTable();
db.CreateTable();
db.CreateTable();
db.CreateTable();

db.Insert(new Employee { Id = 1, Name = "Employee 1" });
db.Insert(new Employee { Id = 2, Name = "Employee 2" });
var product1 = new Product { Id = 1, Name = "Product 1", UnitPrice = 10 };
var product2 = new Product { Id = 2, Name = "Product 2", UnitPrice = 20 };
db.Save(product1, product2);

var customer = new Customer {
FirstName = "Orm",
LastName = "Lite",
Email = "ormlite@servicestack.net",
PhoneNumbers =
{
{ PhoneType.Home, "555-1234" },
{ PhoneType.Work, "1-800-1234" },
{ PhoneType.Mobile, "818-123-4567" },
},
Addresses =
{
{ AddressType.Work, new Address {
Line1 = "1 Street", Country = "US", State = "NY", City = "New York", ZipCode = "10101" }
},
},
CreatedAt = DateTime.UtcNow,
};

var customerId = db.Insert(customer, selectIdentity: true); //Get Auto Inserted Id
customer = db.Single(new { customer.Email }); //Query
Assert.That(customer.Id, Is.EqualTo(customerId));

//Direct access to System.Data.Transactions:
using (IDbTransaction trans = db.OpenTransaction(IsolationLevel.ReadCommitted))
{
var order = new Order {
CustomerId = customer.Id,
EmployeeId = 1,
OrderDate = DateTime.UtcNow,
Freight = 10.50m,
ShippingAddress = new Address {
Line1 = "3 Street", Country = "US", State = "NY", City = "New York", ZipCode = "12121" },
};
db.Save(order); //Inserts 1st time

  //order.Id populated on Save().

  var orderDetails = new[] {
      new OrderDetail {
          OrderId = order.Id,
          ProductId = product1.Id,
          Quantity = 2,
          UnitPrice = product1.UnitPrice,
      },
      new OrderDetail {
          OrderId = order.Id,
          ProductId = product2.Id,
          Quantity = 2,
          UnitPrice = product2.UnitPrice,
          Discount = .15m,
      }
  };

  db.Save(orderDetails);

  order.Total = orderDetails.Sum(x => x.UnitPrice * x.Quantity * x.Discount) + order.Freight;

  db.Save(order); //Updates 2nd Time

  trans.Commit();

}
}
[Ignore] 可以忽略某个属性

![此处输入图片的描述][1]

[Alias("Shippers")]
public class Shipper
: IHasId
{
[AutoIncrement]
[Alias("ShipperID")]
public int Id { get; set; }

[Required]//是否必须
[Index(Unique = true)]//索引
[StringLength(40)]//长度
public string CompanyName { get; set; }

[StringLength(24)]
public string Phone { get; set; }

[References(typeof(ShipperType))]
public int ShipperTypeId { get; set; }

}
这个基本就够用了 codefirst啊
[Alias("ShipperTypes")]
public class ShipperType
: IHasId
{
[AutoIncrement]
[Alias("ShipperTypeID")]
public int Id { get; set; }

[Required]
[Index(Unique = true)]
[StringLength(40)]
public string Name { get; set; }

}

public class SubsetOfShipper
{
public int ShipperId { get; set; }
public string CompanyName { get; set; }
}

public class ShipperTypeCount
{
public int ShipperTypeId { get; set; }
public int Total { get; set; }
}

[Alias("UserAuth")]//别名
[CompositeIndex(true, "CompanyId", "UserName")]//复合索引
public class MyCustomUserAuth
{
    [AutoIncrement]
    public int Id { get; set; }

    [References(typeof(Company))]
    public int CompanyId { get; set; }

    public string UserName { get; set; }

    public string Email { get; set; }
}

---

事务的支持

var trainsType = new ShipperType { Name = "Trains" };
var planesType = new ShipperType { Name = "Planes" };

//Playing with transactions
using (IDbTransaction dbTrans = db.OpenTransaction())
{
db.Save(trainsType);
db.Save(planesType);

  dbTrans.Commit();

}

using (IDbTransaction dbTrans = db.OpenTransaction(IsolationLevel.ReadCommitted))
{
db.Insert(new ShipperType { Name = "Automobiles" });
Assert.That(db.Select(), Has.Count.EqualTo(3));
}
Assert.That(db.Select(), Has.Count(2));

修改表名

dbConn.GetDialectProvider().GetQuotedTableName(modelType.GetModelDefinition())// 获取表名(根据类获取表名)

//oldtableName 因为老表已经不存在了(即老表对应的那个类),所以只能老表名用字符串
public static void AlterTable(this IDbConnection dbConn, Type modelType, string command)
{

var person = db.SqlScalar