public void TestJoinWithTwoChildrenAndComplicatedFilterAndOrderings()
{
const string productName = "Louisiana";
const string categoryName = "Condiments";
const int resultRowCount = 9;
//create root node
var root = new JoinNode(typeof(Products));
// add first child node Categories with propertyName "Products".
// Because Categories linked with Products by next property:
// public EntitySet<Products> Products
var categoryNode = new JoinNode(typeof(Categories), "Category", "Products");
root.AddChildren(categoryNode);
// add second child node Order_Details. PropertyName not defined
// because Order_Details linked with Products by next property:
// public Products Products - name of property is equal name of type
var orderDetailNode = new JoinNode(typeof(Order_Details), "Order_Detail", "Products");
root.AddChildren(orderDetailNode);
var queryDesinger = new QueryDesigner(context, root);
// create conditions for filtering by ProductName Like "Louisiana%" Or CategoryName == "Condiments"
var productCondition = new Condition("ProductName", productName, ConditionOperator.StartsWith,
typeof(Products));
var categoryCondition = new Condition("CategoryName", categoryName, ConditionOperator.EqualTo,
typeof(Categories));
var orCondition = new OrCondition(productCondition, categoryCondition);
// create condition for filtering by [Orders Details].Discount > 0.15
var discountCondition = new Condition("Discount", 0.15F, ConditionOperator.GreaterThan,
typeof(Order_Details));
var conditionals = new ConditionList(orCondition, discountCondition);
// assign conditions
// queryDesinger.Where(conditionals);
// make Distinct
queryDesinger.Distinct();
// make orderings by ProductName and CategoryName
var productNameOrder = new Ordering("ProductName", SortDirection.Ascending, typeof(Products));
// var categoryNameOrder = new Ordering("CategoryName", SortDirection.Descending, typeof(Categories));
queryDesinger.OrderBy(new OrderingList(productNameOrder/*, categoryNameOrder*/));
IQueryable<Products> distictedProducts = queryDesinger.Cast<Products>();
var list = new List<Products>(distictedProducts);
Assert.AreEqual(resultRowCount, list.Count);
string query =
@" SELECT DISTINCT Products.ProductID, Products.ProductName, Products.SupplierID, Products.CategoryID, Products.QuantityPerUnit, Products.UnitPrice, Products.UnitsInStock, Products.UnitsOnOrder, Products.ReorderLevel, Products.Discontinued
FROM Products
INNER JOIN Categories ON Products.CategoryID = Categories.CategoryID
INNER JOIN [Orders Details] ON Products.ProductID = [Orders Details].ProductID
WHERE [Orders Details].Discount > 0.15
AND ((Products.ProductName LIKE N'Louisiana%') OR (Categories.CategoryName = N'Condiments'))";
CheckDataWithExecuteReaderResult(query, resultRowCount, list);
}
public void TestComplicatedJoinWithFilters()
{
const int regionId = 4;
const string territoryDescription = "Orlando";
const int resultRowCount = 23;
//create root node
var root = new JoinNode(typeof(Products));
// add second child node Order_Details. PropertyName not defined
// because Order_Details linked with Products by next property:
// public Products Products - name of property is equal name of type
var orderDetailNode = new JoinNode(typeof(Order_Details), "Order_Detail", "Products");
var categoryNode = new JoinNode(typeof(Categories), "Category", "Products", JoinType.LeftOuterJoin);
var supplierNode = new JoinNode(typeof(Suppliers), "Supplier", "Products");
root.AddChildren(orderDetailNode, categoryNode, supplierNode);
var orderNode = new JoinNode(typeof(Orders), "Order", "Order_Details");
orderDetailNode.AddChildren(orderNode);
var employeeNode = new JoinNode(typeof(Employees), "Employee", "Orders");
orderNode.AddChildren(employeeNode);
var territoryNode = new JoinNode(typeof(Territories), "Territory", "Employees");
employeeNode.AddChildren(territoryNode);
var regionNode = new JoinNode(typeof(Region), "Region", "Territories");
territoryNode.AddChildren(regionNode);
var queryDesinger = new QueryDesigner(context, root);
// create conditions for filtering by RegionID = 4 and TerritoryDescription like "Orlando%" and (CategoryID == 4 or CategoryID == 5 or CategoryID == 6)
var regionCondition = new Condition("RegionID", regionId, ConditionOperator.EqualTo, typeof(Region));
var territoryCondition = new Condition("TerritoryDescription", territoryDescription,
ConditionOperator.StartsWith, typeof(Territories));
OrCondition categoryIDsCondition = OrCondition.Create("CategoryID", new object[] { 4, 5, 6 }, ConditionOperator.EqualTo, typeof(Categories));
var conditionals = new ConditionList(regionCondition, territoryCondition, categoryIDsCondition);
// assign conditions
queryDesinger.Where(conditionals);
// make Distinct
IQueryable<Products> distictedProducts = queryDesinger.Distinct().Cast<Products>();
var list = new List<Products>(distictedProducts);
Assert.AreEqual(resultRowCount, list.Count);
string query =
@"SELECT DISTINCT Products.ProductID, Products.ProductName, Products.SupplierID, Products.CategoryID, Products.QuantityPerUnit, Products.UnitPrice, Products.UnitsInStock, Products.UnitsOnOrder, Products.ReorderLevel, Products.Discontinued
FROM Orders
INNER JOIN [Orders Details] ON Orders.OrderID = [Orders Details].OrderID
INNER JOIN Products ON [Orders Details].ProductID = Products.ProductID
INNER JOIN Employees ON Orders.EmployeeID = Employees.EmployeeID
INNER JOIN EmployeeTerritories ON Employees.EmployeeID = EmployeeTerritories.EmployeeID
INNER JOIN Territories ON EmployeeTerritories.TerritoryID = Territories.TerritoryID
INNER JOIN Region ON Territories.RegionID = Region.RegionID
WHERE (Region.RegionID = 4) AND (Territories.TerritoryDescription like 'Orlando%') AND
(Products.CategoryID IN (4, 5, 6)) ";
CheckDataWithExecuteReaderResult(query, resultRowCount, list);
}
