Come creare una query di criteri per la query sql fornita

Question

Sto creando una query ICriteria per questa query sql equivalente.

SELECT fCustomerID, 
     ISNULL(
       (SELECT SUM(payinv.fAmount) AS Expr1 
       FROM dbo.tARPayment AS pay 
       INNER JOIN dbo.tARPaymentInvoice AS payinv ON pay.fPaymentID = payinv.fPaymentID 
       INNER JOIN dbo.tARInvoice AS inv ON payinv.fInvoiceID = inv.fARInvoiceID 
       WHERE (pay.fIsPosted = CASE pay.fPaymentType WHEN 'CM' THEN 0 WHEN 'EPD' THEN 0 ELSE 1 END) 
        AND (inv.fCustomerID <> dbo.tARCustomer.fCustomerID) 
        AND (pay.fCustomerID = dbo.tARCustomer.fCustomerID)), 0) 
FROM dbo.tARCustomer 
GROUP BY fCustomerID 

Ma non sto ottenendo comunque che come posso generare equivalente query ICriteria niberniata.

Questa è classe pagamento

public partial class tARPayment 
{ 
    #region Constructor 

    /// <summary> 
    /// Initializes a new instance of the <see cref="tARPayment"/> class. 
    /// </summary> 
    public tARPayment() 
    { 
    } 

    /// <summary> 
    /// Initializes a new instance of the <see cref="tARPayment"/> class. 
    /// </summary> 
    /// <param name="fPaymentID">The fPaymentID of guid type.</param> 
    public tARPayment(System.Guid fPaymentID) 
    { 
     this.ID = fPaymentID; 
    } 
    #endregion 

    #region Properties 

    /// <summary> 
    /// Gets or sets payment id. 
    /// </summary> 
    public virtual System.Guid fPaymentID { get; set; } 

    /// <summary> 
    /// Gets or sets fCustomerID. 
    /// </summary> 
    public virtual System.Guid fCustomerID { get; set; } 

    /// <summary> 
    /// Gets or sets check number. 
    /// </summary> 
    public virtual string fCheckNumber { get; set; } 

    /// <summary> 
    /// Gets or sets amount. 
    /// </summary> 
    public virtual decimal fAmount { get; set; }  

    /// <summary> 
    /// Gets or sets customer detail. 
    /// </summary> 
    public virtual tARCustomer Customer { get; set; } 

    public virtual IList<tARPaymentInvoice> PaymentInvoices { get; set; }   

    #endregion 

    #region Methods 
    /// <summary> 
    /// partial class for payment. 
    /// </summary> 
    /// <returns>The method get code.</returns> 
    public override int GetHashCode() 
    { 
     return ID.GetHashCode(); 
    } 
    #endregion 
} 

Questa è una classe fattura

public partial class tARInvoice 
{ 
    #region Constructor 
    /// <summary> 
    /// Initializes a new instance of the <see cref="tARInvoice"/> class. 
    /// </summary> 
    public tARInvoice() 
    { 
    } 

    /// <summary> 
    /// Initializes a new instance of the <see cref="tARInvoice"/> class. 
    /// </summary> 
    /// <param name="fARInvoiceID">The fARInvoiceID.</param> 
    public tARInvoice(System.Guid fARInvoiceID) 
    { 
     this.ID = fARInvoiceID; 
    } 

    #endregion 

    #region Properties 
    /// <summary> 
    /// Gets or sets fARInvoiceID. 
    /// </summary> 
    public virtual Guid fARInvoiceID { get; set; } 

    /// <summary> 
    /// Gets or sets fCustomerID. 
    /// </summary> 
    public virtual Guid fCustomerID { get; set; } 


    /// <summary> 
    /// Gets or sets Delivery Method. 
    /// </summary> 
    public virtual string fDeliveryMethod { get; set; } 

    /// <summary> 
    /// Gets or sets Invoice Number. 
    /// </summary> 
    public virtual int? fARInvoiceNumber { get; set; } 



    public virtual tARCustomer Customer { get; set; } 

    public virtual IList<tARPaymentInvoice> PaymentInvoices { get; set; }   

    #endregion 

    #region Methods 
    /// <summary> 
    /// retrieve Hash Code. 
    /// </summary> 
    /// <returns>The method get code.</returns> 
    public override int GetHashCode() 
    { 
     return ID.GetHashCode(); 
    } 
    #endregion 
} 

Questa è una classe pagamento della fattura.

public partial class tARPaymentInvoice 
{ 
    #region Constructor 
    /// <summary> 
    /// Initializes a new instance of the <see cref="tARPaymentInvoice"/> class. 
    /// </summary> 
    public tARPaymentInvoice() 
    { 
    } 

    /// <summary> 
    /// Initializes a new instance of the <see cref="tARPaymentInvoice"/> class. 
    /// </summary> 
    /// <param name="fPaymentInvoiceID">The Invoice ID.</param> 
    public tARPaymentInvoice(System.Guid fPaymentInvoiceID) 
    { 
     this.ID = fPaymentInvoiceID; 
    } 
    #endregion 

    #region Properties 
    /// <summary> 
    /// Gets or sets fPaymentInvoiceID. 
    /// </summary> 
    public virtual System.Guid fPaymentInvoiceID { get; set; } 

    /// <summary> 
    /// Gets or sets fPaymentID. 
    /// </summary> 
    public virtual System.Guid fPaymentID { get; set; } 

    /// <summary> 
    /// Gets or sets fInvoiceID. 
    /// </summary> 
    public virtual System.Guid fInvoiceID { get; set; }   


    /// <summary> 
    /// Gets or sets tARPayment. 
    /// </summary> 
    public virtual tARPayment Payment { get; set; } 

    /// <summary> 
    /// Gets or sets tARInvoice. 
    /// </summary> 
    public virtual tARInvoice Invoice { get; set; } 

    #endregion 

    #region Methods 
    /// <summary> 
    /// get hash codes. 
    /// </summary>   
    /// <returns>The hash code.</returns> 
    public override int GetHashCode() 
    { 
     return ID.GetHashCode(); 
    } 
    #endregion 
} 

Answer 1

Anziché convertire query precedente per LINQ o HQL, consiglio rendendo la query in una vista, e quindi utilizzando NHibernate per interrogare quella vista.

SQL

CREATE VIEW vCustomerAmount AS 
SELECT fCustomerID, 
     ISNULL(
       (SELECT SUM(payinv.fAmount) AS Expr1 
       FROM dbo.tARPayment AS pay 
       INNER JOIN dbo.tARPaymentInvoice AS payinv ON pay.fPaymentID = payinv.fPaymentID 
       INNER JOIN dbo.tARInvoice AS inv ON payinv.fInvoiceID = inv.fARInvoiceID 
       WHERE (pay.fIsPosted = CASE pay.fPaymentType WHEN 'CM' THEN 0 WHEN 'EPD' THEN 0 ELSE 1 END) 
        AND (inv.fCustomerID <> dbo.tARCustomer.fCustomerID) 
        AND (pay.fCustomerID = dbo.tARCustomer.fCustomerID)), 0) [Amount] 
FROM dbo.tARCustomer 
GROUP BY fCustomerID 

C# DTO

public class CustomerAmount 
{ 
    public int fCustomerID { get; set; } 
    public decimal Amount { get; set; } 
} 

Query

List<CustomerAmount> customerAmounts = session.Query<CustomerAmount>().ToList(); 

Answer 2

Non

sicuro di NHibernate, ma fare es questa domanda riscritta aiuta ad ottenere la stessa risposta ed è qualcosa che puoi eseguire con più facilità?

SELECT T.fCustomerID, 
     coalesce(SUM(payinv.fAmount), 0) as SumAmt 
    FROM 
     dbo.tARCustomer T 
     JOIN dbo.tARPayment AS pay 
      ON T.fCustomerID = pay.fCustomerID 
      AND pay.fIsPosted = CASE pay.fPaymentType 
           WHEN 'CM' THEN 0 
           WHEN 'EPD' THEN 0 
           ELSE 1 END 
      JOIN dbo.tARPaymentInvoice AS payinv 
       ON pay.fPaymentID = payinv.fPaymentID 
       INNER JOIN dbo.tARInvoice AS inv 
        ON payinv.fInvoiceID = inv.fARInvoiceID 
       AND inv.fCustomerID <> T.fCustomerID 
    GROUP BY 
     T.fCustomerID