public void SingleZeroToMany()
{
// The main Employee query
EmployeeQuery eq1 = new EmployeeQuery("e");
eq1.Where(eq1.EmployeeID < 3);
eq1.OrderBy(eq1.EmployeeID.Ascending);
// The Order Collection
OrderQuery oq1 = eq1.Prefetch <OrderQuery>(Employee.Prefetch_OrderCollectionByEmployeeID);
EmployeeQuery eq2 = oq1.GetQuery <EmployeeQuery>();
oq1.Where(eq2.EmployeeID < 3);
// Pre-test the Order query
OrderCollection oColl = new OrderCollection();
oColl.es.Connection.Name = "ForeignKeyTest";
oColl.Load(oq1);
Assert.AreEqual(3, oColl.Count, "Order pre-test");
// This will Prefetch the Order query
EmployeeCollection coll = new EmployeeCollection();
coll.es.Connection.Name = "ForeignKeyTest";
//coll.es.IsLazyLoadDisabled = true;
coll.Load(eq1);
foreach (Employee emp in coll)
{
emp.es.IsLazyLoadDisabled = true;
switch (emp.EmployeeID.Value)
{
case 1:
Assert.AreEqual(1, emp.EmployeeID.Value);
Assert.AreEqual(1, emp.OrderCollectionByEmployeeID.Count);
break;
case 2:
Assert.AreEqual(2, emp.EmployeeID.Value);
Assert.AreEqual(2, emp.OrderCollectionByEmployeeID.Count);
break;
default:
Assert.Fail("Only employees 1 and 2 should be loaded.");
break;
}
}
}
public void NestedZeroToManyEntity()
{
//The main Employee query
EmployeeQuery eq1 = new EmployeeQuery();
eq1.Where(eq1.EmployeeID == 1);
// Prefetch Employee Customers by Manager
CustomerQuery cq1 = eq1.Prefetch <CustomerQuery>(
Employee.Prefetch_CustomerCollectionByManager);
EmployeeQuery eq2 = cq1.GetQuery <EmployeeQuery>();
cq1.Where(eq2.EmployeeID == 1);
// Prefetch Employee Customers Orders (composite FK)
OrderQuery oq1 = eq1.Prefetch <OrderQuery>(
Employee.Prefetch_CustomerCollectionByManager,
Customer.Prefetch_OrderCollectionByCustID);
EmployeeQuery eq3 = oq1.GetQuery <EmployeeQuery>();
oq1.Where(eq3.EmployeeID == 1);
// Prefetch Employee Customers Orders OrderItems
OrderItemQuery oiq1 = eq1.Prefetch <OrderItemQuery>(
Employee.Prefetch_CustomerCollectionByManager,
Customer.Prefetch_OrderCollectionByCustID,
Order.Prefetch_OrderItemCollectionByOrderID);
EmployeeQuery eq4 = oiq1.GetQuery <EmployeeQuery>();
oiq1.Where(eq4.EmployeeID == 1);
// Prefetch Employee Customers by StaffAssigned
CustomerQuery cq2 = eq1.Prefetch <CustomerQuery>(
Employee.Prefetch_CustomerCollectionByStaffAssigned);
EmployeeQuery eq5 = cq2.GetQuery <EmployeeQuery>();
cq2.Where(eq5.EmployeeID == 1);
Employee emp = new Employee();
emp.es.Connection.Name = "ForeignKeyTest";
emp.Load(eq1);
Assert.AreEqual(1, emp.EmployeeID.Value);
Assert.AreEqual(35, emp.CustomerCollectionByManager.Count);
Assert.AreEqual(2, emp.CustomerCollectionByStaffAssigned.Count);
Assert.AreEqual(0, emp.EmployeeCollectionBySupervisor.Count, "These 2 are not Prefetched");
foreach (Customer c in emp.CustomerCollectionByManager)
{
if (c.CustomerID == "01001" && c.CustomerSub == "001")
{
Assert.AreEqual(3, c.OrderCollectionByCustID.Count);
foreach (Order o in c.OrderCollectionByCustID)
{
if (o.OrderID == 1)
{
Assert.AreEqual(3, o.OrderItemCollectionByOrderID.Count);
}
}
}
}
}
public void NestedZeroToMany()
{
// The main Employee query
EmployeeQuery eq1 = new EmployeeQuery("e");
eq1.Where(eq1.EmployeeID < 4);
eq1.OrderBy(eq1.EmployeeID.Ascending);
// The Order Collection
OrderQuery oq1 = eq1.Prefetch <OrderQuery>(Employee.Prefetch_OrderCollectionByEmployeeID);
EmployeeQuery eq2 = oq1.GetQuery <EmployeeQuery>();
oq1.Where(eq2.EmployeeID < 4 && oq1.PlacedBy < 3);
// Pre-test the Order query
OrderCollection oColl = new OrderCollection();
oColl.es.Connection.Name = "ForeignKeyTest";
oColl.Load(oq1);
Assert.AreEqual(5, oColl.Count, "Order pre-test");
// The OrderItem Collection
OrderItemQuery oiq1 = eq1.Prefetch <OrderItemQuery>(Employee.Prefetch_OrderCollectionByEmployeeID, Order.Prefetch_OrderItemCollectionByOrderID);
EmployeeQuery eq3 = oiq1.GetQuery <EmployeeQuery>();
OrderQuery oq2 = oiq1.GetQuery <OrderQuery>();
oiq1.Where(eq3.EmployeeID < 4 && oq2.PlacedBy < 3 && oiq1.Quantity < 100);
// Pre-test the OrderItem query
OrderItemCollection oiColl = new OrderItemCollection();
oiColl.es.Connection.Name = "ForeignKeyTest";
oiColl.Load(oiq1);
Assert.AreEqual(4, oiColl.Count, "OrderItem pre-test");
// Will Prefetch the Order and OrderItems queries
EmployeeCollection coll = new EmployeeCollection();
coll.es.Connection.Name = "ForeignKeyTest";
//coll.es.IsLazyLoadDisabled = true;
coll.Load(eq1);
foreach (Employee emp in coll)
{
emp.es.IsLazyLoadDisabled = true;
switch (emp.EmployeeID.Value)
{
case 1:
Assert.AreEqual(1, emp.EmployeeID.Value);
Assert.AreEqual(0, emp.OrderCollectionByEmployeeID.Count);
break;
case 2:
Assert.AreEqual(2, emp.EmployeeID.Value);
Assert.AreEqual(2, emp.OrderCollectionByEmployeeID.Count);
foreach (Order o in emp.OrderCollectionByEmployeeID)
{
Assert.Less(0, o.OrderItemCollectionByOrderID.Count);
}
break;
case 3:
Assert.AreEqual(3, emp.EmployeeID.Value);
Assert.AreEqual(3, emp.OrderCollectionByEmployeeID.Count);
foreach (Order o in emp.OrderCollectionByEmployeeID)
{
Assert.AreEqual(0, o.OrderItemCollectionByOrderID.Count);
}
break;
default:
Assert.Fail("Only employees 1, 2, and 3 should be loaded.");
break;
}
}
}