c# - Hibernate QueryOver 複雑なクエリ

Question

現在、ac#、MVC3、NHibernate (MSSQL 2008) アプリケーションに取り組んでいます。これを理解するための最良の方法だと思うので、簡単な例を示します。

モデル:

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;}
}

私の最終的な目標は、以下を含むリストを作成することです。

製品名、会社名、国名、州名、現在の在庫数、入荷在庫数、出荷在庫数

次のクエリを使用して、現在の在庫に対してこれを行うことができます。

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>();

私が立ち往生しているのは、TransactionHeader / TransactionRow データに基づいて、入庫と出庫の在庫を追加する方法です。入荷在庫数を取得するためのクエリでの私の試みは次のとおりです。

            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))

複数のプロパティによるグループ化が機能していないようです:

 Could not determine member from new <>f__AnonymousType3`2(ToCompany = value(<Stuff>).ith.ToCompany, Product = value(<Stuff>).itr.Product)

したがって、これは2つの質問につながります：

私はこの全体について間違っていますか？ストアドプロシージャの方が優れたソリューションでしょうか。
このアプローチが問題ない場合、どうすれば複数のフィールドでグループ化できますか?

編集:私が生成したいSQLの種類の例:

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

編集 2: 目的の SQL の 2 番目のバージョン

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

score 0 · Accepted Answer

SQL を書き出すよう促し、これを理解するよう促してくれた Andrew に感謝します。

セットアップに関して欠けていたことがいくつかありました。

会社には、次の 2 つの追加のプロパティが必要でした。

public virtual IList<TransactionHeader> TransactionsFromCompany { get; set; }
public virtual IList<TransactionHeader> TransactionsToCompany { get; set; }

これらを適切な列にマップするには、自動マッピングをオーバーライドする必要がありました。

.Override<Company>(m =>
{
    m.HasMany(c => c.TransactionsFromCompany)
        .KeyColumn("FromCompany");
    m.HasMany(c => c.TransactionsToCompany)
        .KeyColumn("ToCompany");
}

これで、クエリを作成できます。

StockLevelRowVM rowVM = null;
Stock s = null;
Company c = null;
State state = null;
Country country = null;
Product p = null;
TransactionHeader ith = null;
TransactionRow itr = null;
TransactionHeader oth = null;
TransactionRow otr = null;

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)
    .JoinAlias<TransactionHeader>(() => c.TransactionsFromCompany, () => oth, NHibernate.SqlCommand.JoinType.LeftOuterJoin, null)
    .JoinAlias<TransactionRow>(() => oth.Rows, () => otr, NHibernate.SqlCommand.JoinType.LeftOuterJoin, null)
    .JoinAlias<TransactionHeader>(() => c.TransactionsToCompany, () => ith, NHibernate.SqlCommand.JoinType.LeftOuterJoin, null)
    .JoinAlias<TransactionRow>(() => ith.Rows, () => itr, NHibernate.SqlCommand.JoinType.LeftOuterJoin, null);
if (productId.HasValue) { stockQuery = stockQuery.Where(() => p.Id == productId); }
if (companyId.HasValue) { stockQuery = stockQuery.Where(() => c.Id == companyId); }
if (stateId.HasValue) { stockQuery = stockQuery.Where(() => state.Id == stateId); }
if (countryId.HasValue) { stockQuery = stockQuery.Where(() => country.Id == countryId); }

<call generic paging methods for IQueryOver>

result = stockQuery.SelectList(list => list
            .SelectGroup(() => c.Id)
            .SelectGroup(() => p.Id)
            .SelectGroup(() => c.Description).WithAlias(() => rowVM.CompanyName)
            .SelectGroup(() => state.Description).WithAlias(() => rowVM.StateName)
            .SelectGroup(() => country.Description).WithAlias(() => rowVM.CountryName)
            .SelectGroup(() => p.Description).WithAlias(() => rowVM.ProductName)
            .SelectSum(() => s.currentStock).WithAlias(() => rowVM.CurrentStock)
            .SelectSum(() => otr.Quantity).WithAlias(() => rowVM.OutgoingStock)
            .SelectSum(() => itr.Quantity).WithAlias(() => rowVM.IncommingStock))
        .TransformUsing(Transformers.AliasToBean<StockLevelRowVM>())
        .List<StockLevelRowVM>().ToList();

c# - Hibernate QueryOver 複雑なクエリ

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