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我目前正在開發一個c＃，MVC3，NHibernate（在MSSQL 2008）應用程序。 我會提供一個簡化的例子，因爲我認爲這是理解這一點的最好方法。NHibernate QueryOver複雜查詢
型號：
class Stock
{
public Company Company {get;set;}
public Product Product {get;set;}
public int quantity {get;set;}
}
class TransactionHeader
{
public Company FromCompany {get;set;}
public Company ToCompany {get;set;}
public IList<TransactionRow> Rows {get;set;}
}
class TransactionRows
{
public Product Product {get;set;}
public TransactionHeader Header {get;set;}
public int Quantity {get;set;}
}
class Company
{
public Country Country {get;set;}
public State State {get;set;}
public string Name {get;set;}
}
我的最終目標是產生含有列表：
產品名稱，公司名稱，國家名稱，國家名稱，當前庫存數量，進來的庫存數量，傳出庫存數量
我能爲當前股市與此查詢做到這一點：
var stockQuery = session.QueryOver<Stock>(() => s)
.JoinAlias<Company>(() => s.company,() => c, NHibernate.SqlCommand.JoinType.InnerJoin, null)
.JoinAlias<State>(() => c.State,() => state, NHibernate.SqlCommand.JoinType.InnerJoin, null)
.JoinAlias<Country>(() => c.Country,() => country, NHibernate.SqlCommand.JoinType.InnerJoin, null)
.JoinAlias<Product>(() => s.product,() => p, NHibernate.SqlCommand.JoinType.InnerJoin, null);
if (productId.HasValue) { stockQuery = stockQuery.Where(() => p.Id == productId); }
var stock = stockQuery.SelectList(list => list
.Select(() => s.currentStock).WithAlias(() => rowVM.CurrentStock)
.Select(() => c.Description).WithAlias(() => rowVM.CompanyName)
.Select(() => state.Description).WithAlias(() => rowVM.StateName)
.Select(() => country.Description).WithAlias(() => rowVM.CountryName)
.Select(() => p.Description).WithAlias(() => rowVM.ProductName))
.TransformUsing(Transformers.AliasToBean<StockLevelRowVM>())
.List<StockLevelRowVM>();
我堅持的是如何添加基於TransactionHeader/TransactionRow數據的輸入和輸出股票。 這是我在一個查詢試圖讓進來的股票數量：
由多個屬性組似乎 var incommingQuery = session.QueryOver<TransactionRow>(() => itr)
.JoinAlias<TransactionHeader>(() => itr.TransactionHeader,() => ith, NHibernate.SqlCommand.JoinType.InnerJoin, null)
.JoinAlias<Company>(() => ith.ToCompany,() => c, NHibernate.SqlCommand.JoinType.InnerJoin, null)
.JoinAlias<Product>(() => itr.Product,() => p, NHibernate.SqlCommand.JoinType.InnerJoin, null)
.SelectList(list => list
.SelectGroup(() => new { ith.ToCompany, itr.Product })
.Select(() => itr.Quantity).WithAlias(() => detail.Quantity)
.Select(() => p.Id).WithAlias(() => detail.ProductId)
.Select(() => c.Id).WithAlias(() => detail.CompanyId))
不工作：
Could not determine member from new <>f__AnonymousType3`2(ToCompany = value(<Stuff>).ith.ToCompany, Product = value(<Stuff>).itr.Product)
因此，這導致我2個問題：
- 我對這件事情做錯了嗎？存儲過程會是一個更好的解決方案嗎？
- 如果這種方法很好，那麼我怎樣才能按多個字段進行分組？
編輯：
SELECT c.Description CompanyName,
p.Description ProductName,
cc.Description CountryName,
cs.Description StateName,
tmp.CurrentStock,
tmp.OutgoingStock,
tmp.IncommingStock
FROM
(
SELECT results.CompanyId,
results.ProductId,
SUM(results.CurrentStock) CurrentStock,
SUM(results.IncommingStock) IncommingStock,
SUM(results.OutgoingStock) OutgoingStock
FROM (
SELECT
c.Id CompanyId,
p.Id ProductId,
s.CurrentStock,
0 IncommingStock,
0 OutgoingStock
FROM Stock s
INNER JOIN Company c ON c.Id = s.Company
INNER JOIN [State] cs ON cs.Id = c.[State]
INNER JOIN Country cc ON cc.Id = cs.Country
INNER JOIN Product p ON p.Id = s.Product
WHERE (@CompanyId IS NULL OR c.Id = @CompanyId) AND
(@CountryId IS NULL OR cc.Id = @CountryId) AND
(@StateId IS NULL OR cs.Id = @StateId) AND
(@ProductId IS NULL OR p.Id = @ProductId)
UNION
SELECT
c.Id CompanyId,
p.Id ProductId,
0 CurrentStock,
0 IncommingStock,
tr.Quantity OutgoingStock
FROM TransactionRow tr
INNER JOIN TransactionHeader th ON th.Id = tr.TransactionHeader
INNER JOIN Company c ON c.Id = th.FromCompany
INNER JOIN [State] cs ON cs.Id = c.[State]
INNER JOIN Country cc ON cc.Id = cs.Country
INNER JOIN Product p ON p.Id = tr.Product
WHERE (@CompanyId IS NULL OR c.Id = @CompanyId) AND
(@CountryId IS NULL OR cc.Id = @CountryId) AND
(@StateId IS NULL OR cs.Id = @StateId) AND
(@ProductId IS NULL OR p.Id = @ProductId)
UNION
SELECT
c.Id CompanyId,
p.Id ProductId,
0 CurrentStock,
tr.Quantity IncommingStock,
0 OutgoingStock
FROM TransactionRow tr
INNER JOIN TransactionHeader th ON th.Id = tr.TransactionHeader
INNER JOIN Company c ON c.Id = th.ToCompany
INNER JOIN [State] cs ON cs.Id = c.[State]
INNER JOIN Country cc ON cc.Id = cs.Country
INNER JOIN Product p ON p.Id = tr.Product
WHERE (@CompanyId IS NULL OR c.Id = @CompanyId) AND
(@CountryId IS NULL OR cc.Id = @CountryId) AND
(@StateId IS NULL OR cs.Id = @StateId) AND
(@ProductId IS NULL OR p.Id = @ProductId)
) results
GROUP BY results.CompanyId, results.ProductId
) tmp
INNER JOIN Company c ON c.Id = tmp.CompanyId
INNER JOIN [State] cs ON cs.Id = c.[State]
INNER JOIN Country cc ON cc.Id = cs.Country
INNER JOIN Product p ON p.Id = tmp.CompanyId
編輯2：排序SQL我想產生的實例所需的SQL的第二個版本
SELECT
c.Id CompanyId,
c.Description CompanyName,
p.Id ProductId,
p.Description ProductName,
cs.Description StateName,
cc.Description CountryName,
SUM(s.CurrentStock) CurrentStock,
SUM(ttr.Quantity) IncommingStock,
SUM(ftr.Quantity) OutgoingStock
FROM Stock s
INNER JOIN Company c ON c.Id = s.Company
INNER JOIN [State] cs ON cs.Id = c.[State]
INNER JOIN Country cc ON cc.Id = cs.Country
INNER JOIN Product p ON p.Id = s.Product
LEFT JOIN TransactionHeader fth ON fth.FromCompany = c.Id
LEFT JOIN TransactionRow ftr ON ftr.TransactionHeader = fth.ID
AND ftr.Product = p.Id
LEFT JOIN TransactionHeader tth ON tth.ToCompany = c.Id
LEFT JOIN TransactionRow ttr ON ttr.TransactionHeader = tth.ID
AND ttr.Product = p.Id
WHERE (@CompanyId IS NULL OR c.Id = @CompanyId) AND
(@CountryId IS NULL OR cc.Id = @CountryId) AND
(@StateId IS NULL OR cs.Id = @StateId) AND
(@ProductId IS NULL OR p.Id = @ProductId)
GROUP BY p.Id, c.Id, c.Description, p.Description,
cs.Description, cc.Description
你能不能表現出你希望生成SQL？以這種方式提出QueryOver會更容易。 –
@AndrewWhitaker我沒有任何SQL可以繼續，但敲了一些並將其添加到問題。它可能不是100％正確的，但應該有希望傳達我想要實現的目標。 – Steve
嗯，你無法使用QueryOver來執行'UNION'或者從表格中選擇（'FROM（SELECT ...）'）。 –