using System.Collections.Generic;
namespace CustomerOrdersSample.Domain
{
   public class Customer
   {
       public virtual int Id { get; set; }
       public virtual string Name { get; set; }
       public virtual IList<Order> Orders { get; set; }
   }
}

using System;
using System.Collections.Generic;
namespace CustomerOrdersSample.Domain
{
   public class Order
   {
       public virtual int Id { get; set; }
       public virtual DateTime OrderDate { set; get; }
       public virtual Customer Customer { get; set; }
       public virtual IList<OrderItem> OrderItems { set; get; }
   }
}

namespace CustomerOrdersSample.Domain
{
   public class OrderItem
   {
       public virtual int Id { get; set; }
       public virtual Product Product { get; set; }
       public virtual int Quntity { get; set; }
       public virtual Order Order { set; get; }
   }
}

namespace CustomerOrdersSample.Domain
{
   public class Product
   {
       public virtual int Id { set; get; }
       public virtual string Name { get; set; }
       public virtual decimal UnitPrice { get; set; }
   }
}

    create table Customers (
      CustomerId INT IDENTITY NOT NULL,
      Name NVARCHAR(255) null,
      primary key (CustomerId)
   )

   create table Orders (
      OrderId INT IDENTITY NOT NULL,
      OrderDate DATETIME null,
      CustomerId INT null,
      primary key (OrderId)
   )

   create table OrderItems (
      OrderItemId INT IDENTITY NOT NULL,
      Quntity INT null,
      ProductId INT null,
      OrderId INT null,
      primary key (OrderItemId)
   )

   create table Products (
      ProductId INT IDENTITY NOT NULL,
      Name NVARCHAR(255) null,
      UnitPrice NUMERIC(19,5) null,
      primary key (ProductId)
   )

   alter table Orders
       add constraint fk_Customer_Order
       foreign key (CustomerId)
       references Customers

   alter table OrderItems
       add constraint fk_Product_OrderItem
       foreign key (ProductId)
       references Products

   alter table OrderItems
       add constraint fk_Order_OrderItem
       foreign key (OrderId)
       references Orders

SET IDENTITY_INSERT [Customers] ON;
GO
INSERT INTO [Customers] ([CustomerId],[Name]) VALUES (1,N'Customer1');
GO
SET IDENTITY_INSERT [Customers] OFF;
GO
SET IDENTITY_INSERT [Products] ON;
GO
INSERT INTO [Products] ([ProductId],[Name],[UnitPrice]) VALUES (1,N'Product1',1000.00000);
GO
INSERT INTO [Products] ([ProductId],[Name],[UnitPrice]) VALUES (2,N'Product2',2000.00000);
GO
INSERT INTO [Products] ([ProductId],[Name],[UnitPrice]) VALUES (3,N'Product3',3000.00000);
GO
SET IDENTITY_INSERT [Products] OFF;
GO
SET IDENTITY_INSERT [Orders] ON;
GO
INSERT INTO [Orders] ([OrderId],[OrderDate],[CustomerId]) VALUES (1,{ts '2011-01-07 11:25:20.000'},1);
GO
SET IDENTITY_INSERT [Orders] OFF;
GO
SET IDENTITY_INSERT [OrderItems] ON;
GO
INSERT INTO [OrderItems] ([OrderItemId],[Quntity],[ProductId],[OrderId]) VALUES (1,10,1,1);
GO
INSERT INTO [OrderItems] ([OrderItemId],[Quntity],[ProductId],[OrderId]) VALUES (2,5,2,1);
GO
INSERT INTO [OrderItems] ([OrderItemId],[Quntity],[ProductId],[OrderId]) VALUES (3,20,3,1);
GO
SET IDENTITY_INSERT [OrderItems] OFF;
GO

var list = session.QueryOver<Customer>().List();

foreach (var customer in list)
{
      foreach (var order in customer.Orders)
      {
          foreach (var orderItem in order.OrderItems)
          {
                Console.WriteLine("{0}:{1}:{2}", customer.Name, order.OrderDate, orderItem.Product.Name);
           }
       }
}

Customer1:2011/01/07 11:25:20 :Product1
Customer1:2011/01/07 11:25:20 :Product2
Customer1:2011/01/07 11:25:20 :Product3

var list = session
                   .QueryOver<Customer>()
                   .Fetch(c => c.Orders).Eager
                   .Fetch(c => c.Orders.First().OrderItems).Eager
                   .Fetch(c => c.Orders.First().OrderItems.First().Product).Eager
                   .List();

foreach (var customer in list)
{
     foreach (var order in customer.Orders)
     {
           foreach (var orderItem in order.OrderItems)
           {
               Console.WriteLine("{0}:{1}:{2}", customer.Name, order.OrderDate, orderItem.Product.Name);
            }
      }
}

...
.TransformUsing(NHibernate.Transform.Transformers.DistinctRootEntity)
.List();

var list = session
                   .Query()
                   .FetchMany(c => c.Orders)
                   .ThenFetchMany(o => o.OrderItems)
                   .ThenFetch(p => p.Product)
                   .ToList();

Bag=IList
Set=Iesi.Collections.ISet
List=IList
Map=IDictionary

using System.Collections.Generic;

namespace Test1.Model12
{
   public class User
   {
       public virtual int Id { set; get; }
       public virtual string Name { get; set; }
       public virtual IDictionary<string, string> Preferences { get; set; }
   }
}

using FluentNHibernate.Automapping;
using FluentNHibernate.Automapping.Alterations;

namespace Test1.Model12
{
   public class UserMapping : IAutoMappingOverride<User>
   {
       public void Override(AutoMapping<User> mapping)
       {
           mapping.Id(x => x.Id);
           mapping.HasMany(x => x.Preferences)
               .AsMap<string>("FieldKey")
               .Element("FieldValue", x => x.Type<string>().Length(500));
       }
   }
}

create table "User" (
      Id INT IDENTITY NOT NULL,
      Name NVARCHAR(255) null,
      primary key (Id)
   )

create table Preferences (
      User_id INT not null,
      FieldValue NVARCHAR(500) null,
      FieldKey NVARCHAR(255) not null,
      primary key (User_id, FieldKey)
   )

alter table Preferences
       add constraint FKD6CB18523B1FD789
       foreign key (User_id)
       references "User"

using System.Collections.Generic;

namespace Test1.Model13
{
   public class User
   {
       public virtual int Id { get; set; }
       public virtual string Name { get; set; }
       public virtual IDictionary<string, Property> Properties { get; set; }
   }

   public class Property
   {
       public virtual int Id { get; set; }
       public virtual string Name { get; set; }
       public virtual string Value { get; set; }
       public virtual User User { get; set; }
   }
}

using FluentNHibernate.Automapping;
using FluentNHibernate.Automapping.Alterations;

namespace Test1.Model13
{
   public class UserMapping : IAutoMappingOverride<User>
   {
       public void Override(AutoMapping<User> mapping)
       {
           mapping.Id(x => x.Id);
           mapping.HasMany<Property>(x => x.Properties)
               .AsMap<string>("FieldKey")
               .Component(x => x.Map(c => c.Id));
       }
   }
}

create table "Property" (
      Id INT IDENTITY NOT NULL,
      Name NVARCHAR(255) null,
      Value NVARCHAR(255) null,
      User_id INT null,
      primary key (Id)
   )

create table "User" (
      Id INT IDENTITY NOT NULL,
      Name NVARCHAR(255) null,
      primary key (Id)
   )

create table Properties (
      User_id INT not null,
      Id INT null,
      FieldKey NVARCHAR(255) not null,
      primary key (User_id, FieldKey)
   )

alter table "Property"
       add constraint FKF9F4D85A3B1FD7A2
       foreign key (User_id)
       references "User"

alter table Properties
       add constraint FK63646D853B1FD7A2
       foreign key (User_id)
       references "User"

using System;
using System.Collections.Generic;

namespace Test1.Model14
{
   public class FormData
   {
       public virtual int Id { get; set; }
       public virtual DateTime? DateTime { get; set; }
       public virtual IDictionary<FormField, string> FormPropertyValues { get; set; }
   }

   public class FormField
   {
       public virtual int Id { get; set; }
       public virtual string Name { get; set; }
   }
}

using FluentNHibernate.Automapping;
using FluentNHibernate.Automapping.Alterations;

namespace Test1.Model14
{
   public class FormDataMapping : IAutoMappingOverride<FormData>
   {
       public void Override(AutoMapping<FormData> mapping)
       {
           mapping.Id(x => x.Id);
           mapping.HasMany<FormField>(x => x.FormPropertyValues)
                  .AsEntityMap("FieldId")
                  .Element("FieldValue", x => x.Type<string>().Length(500))
                  .Cascade.All();
       }
   }
}

create table "FormData" (
      Id INT IDENTITY NOT NULL,
      DateTime DATETIME null,
      primary key (Id)
   )

create table FormPropertyValues (
      FormData_id INT not null,
      FieldValue NVARCHAR(500) null,
      FieldId INT not null,
      primary key (FormData_id, FieldId)
   )

create table "FormField" (
      Id INT IDENTITY NOT NULL,
      Name NVARCHAR(255) null,
      primary key (Id)
   )

alter table FormPropertyValues
       add constraint FKB807B9C090849E
       foreign key (FormData_id)
       references "FormData"

alter table FormPropertyValues
       add constraint FKB807B97165898A
       foreign key (FieldId)
       references "FormField"

public class Service
{
   public virtual int Id { get; set; }
   public virtual string Name { get; set; }
   public virtual IList<ServiceFormField> Fields { get; set; }
   public virtual IList<ServiceFormData> Forms { get; set; }
}

public class ServiceFormField
{
   public virtual int Id { get; set; }
   public virtual string Name { get; set; }
   public virtual bool IsRequired { get; set; }
   public virtual Service Service { get; set; }
}

public class ServiceFormData
{
   public virtual int Id { get; set; }
   public virtual IDictionary<ServiceFormField, string> FormPropertyValues { get; set; }       
   public virtual DateTime? DateTime { get; set; }
   public virtual Service Service { get; set; }
}

public class Product
{
      public virtual int Id { set; get; }

      [Length(120)]
      [NotNullNotEmpty]
      public virtual string Name { get; set; }
    
      public virtual decimal UnitPrice { get; set; }
}

public class ProductCustomMappings : IAutoMappingOverride<Product>
{
   public void Override(AutoMapping<Product> mapping)
   {
      mapping.Id(u => u.Id).GeneratedBy.Identity(); //ضروری است
      mapping.Map(p => p.Name).Unique();
   }     
}

public class Account
{
       public virtual int Id { get; set; }

       [NotNullNotEmpty]
       [Length(Min = 3, Max = 120, Message = "طول نام باید بین 3 و 120 کاراکتر باشد")]
       public virtual string Name { get; set; } 
}

public class Category
{
       public virtual int Id { get; set; }

       [NotNullNotEmpty]
       [Length(Min = 3, Max = 130, Message = "طول نام باید بین 3 و 130 کاراکتر باشد")]
       public virtual string Name { get; set; } 
}

public class Payee
{
       public virtual int Id { get; set; }

       [NotNullNotEmpty]
       [Length(Min = 3, Max = 120, Message = "طول نام باید بین 3 و 120 کاراکتر باشد")]
       public virtual string Name { get; set; }
}

public class Bill
{
       public virtual int Id { get; set; }

       [NotNull]
       public virtual Account Account { get; set; }

       [NotNull]
       public virtual Category Category { get; set; }

       [NotNull]
       public virtual Payee Payee { get; set; }

       [NotNull]
       public virtual decimal Amount { set; get; }

       [NotNull]
       public virtual DateTime BillDate { set; get; }

       [NotNullNotEmpty]
       [Length(Min = 1, Max = 500, Message = "طول توضیحات باید بین 1 و 500 کاراکتر باشد")]
       public virtual string Description { get; set; } 
}

    create table Accounts (
       AccountId INT IDENTITY NOT NULL,
      Name NVARCHAR(120) not null,
      primary key (AccountId)
   )

   create table Bills (
       BillId INT IDENTITY NOT NULL,
      Amount DECIMAL(19,5) not null,
      BillDate DATETIME not null,
      Description NVARCHAR(500) not null,
      AccountId INT not null,
      CategoryId INT not null,
      PayeeId INT not null,
      primary key (BillId)
   )

   create table Categories (
       CategoryId INT IDENTITY NOT NULL,
      Name NVARCHAR(130) not null,
      primary key (CategoryId)
   )

   create table Payees (
       PayeeId INT IDENTITY NOT NULL,
      Name NVARCHAR(120) not null,
      primary key (PayeeId)
   )

   alter table Bills
       add constraint fk_Account_Bill
       foreign key (AccountId)
       references Accounts

   alter table Bills
       add constraint fk_Category_Bill
       foreign key (CategoryId)
       references Categories

   alter table Bills
       add constraint fk_Payee_Bill
       foreign key (PayeeId)
       references Payees

var newBill = new Bill
                   {
                       Account = accountRepository.GetByKey(1),
                       Amount = 1,
                       BillDate = DateTime.Now,
                       Category = categoryRepository.GetByKey(1),
                       Description = "testestest...",
                       Payee = payeeRepository.GetByKey(1)
                   };

SELECT account0_.AccountId as AccountId0_0_, account0_.Name as Name0_0_
FROM Accounts account0_ WHERE account0_.AccountId=@p0;@p0 = 1 [Type: Int32 (0)]

SELECT category0_.CategoryId as CategoryId2_0_, category0_.Name as Name2_0_
FROM Categories category0_ WHERE category0_.CategoryId=@p0;@p0 = 1 [Type: Int32 (0)]

SELECT payee0_.PayeeId as PayeeId3_0_, payee0_.Name as Name3_0_
FROM Payees payee0_ WHERE payee0_.PayeeId=@p0;@p0 = 1 [Type: Int32 (0)]

INSERT INTO Bills (Amount, BillDate, Description, AccountId, CategoryId, PayeeId)
VALUES (@p0, @p1, @p2, @p3, @p4, @p5);
select SCOPE_IDENTITY();
@p0 = 1 [Type: Decimal (0)],
@p1 = 2010/12/27 11:48:33 ق.ظ [Type: DateTime (0)],
@p2 = 'testestest...' [Type: String (500)],
@p3 = 1 [Type: Int32 (0)],
@p4 = 1 [Type: Int32 (0)],
@p5 = 1 [Type: Int32 (0)]

INSERT INTO Bills (Amount, BillDate, Description, AccountId, CategoryId, PayeeId)
VALUES (@p0, @p1, @p2, @p3, @p4, @p5);
select SCOPE_IDENTITY();
@p0 = 1 [Type: Decimal (0)],
@p1 = 2010/12/27 11:58:22 ق.ظ [Type: DateTime (0)],
@p2 = 'testestest...' [Type: String (500)],
@p3 = 1 [Type: Int32 (0)],
@p4 = 1 [Type: Int32 (0)],
@p5 = 1 [Type: Int32 (0)]

public partial class Bill : EntityObject
{
       public global::System.Int32 BillId {set;get;}
       public global::System.Decimal Amount {set;get;}
       public global::System.DateTime BillDate {set;get;}
       public global::System.String Description {set;get;}
       public global::System.Int32 AccountId {set;get;}
       public global::System.Int32 CategoryId {set;get;}
       public global::System.Int32 PayeeId {set;get;}
       public Account Account {set;get;}
       public Category Category {set;get;}
}

using System;
using NHibernate.Validator.Constraints;

namespace FormulaTests.Domain
{
   public class User
   {
       public virtual int Id { get; set; }

       [NotNull]
       public virtual DateTime JoinDate { set; get; }

       [NotNullNotEmpty]
       [Length(450)]
       public virtual string FirstName { get; set; }

       [NotNullNotEmpty]
       [Length(450)]
       public virtual string LastName { get; set; }

       [Length(900)]
       public virtual string FullName { get; private set; } //از طریق تعریف فرمول مقدار دهی می‌گردد

       public virtual int DayOfWeek { get; private set; }//از طریق تعریف فرمول مقدار دهی می‌گردد
   }
}

using FluentNHibernate.Automapping;
using FluentNHibernate.Automapping.Alterations;

namespace FormulaTests.Domain
{
   public class UserCustomMappings : IAutoMappingOverride<User>
   {
       public void Override(AutoMapping<User> mapping)
       {
           mapping.Id(u => u.Id).GeneratedBy.Identity(); //ضروری است 
           mapping.Map(x => x.DayOfWeek).Formula("DATEPART(dw, JoinDate) - 1");
           mapping.Map(x => x.FullName).Formula("FirstName + ' ' + LastName");
       }
   }
}

    create table Users (
       UserId INT IDENTITY NOT NULL,
      JoinDate DATETIME not null,
      FirstName NVARCHAR(450) not null,
      LastName NVARCHAR(450) not null,
      primary key (UserId)
   )

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
 default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
 <class xmlns="urn:nhibernate-mapping-2.2" mutable="true"
 name="FormulaTests.Domain.User, FormulaTests, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" table="Users">
   <id name="Id" type="System.Int32" unsaved-value="0">
     <column name="UserId" />
     <generator class="identity" />
   </id>
   <property name="DayOfWeek" formula="DATEPART(dw, JoinDate) - 1" type="System.Int32" />
   <property name="FullName" formula="FirstName + ' ' + LastName" type="System.String" />
   <property name="JoinDate" type="System.DateTime">
     <column name="JoinDate" />
   </property>
   <property name="FirstName" type="System.String">
     <column name="FirstName" />
   </property>
   <property name="LastName" type="System.String">
     <column name="LastName" />
   </property>
 </class>
</hibernate-mapping>

var list = session.Query<User>.ToList();
foreach (var item in list)
{
   Console.WriteLine("{0}:{1}", item.FullName, item.DayOfWeek);
}

select
       user0_.UserId as UserId0_,
       user0_.JoinDate as JoinDate0_,
       user0_.FirstName as FirstName0_,
       user0_.LastName as LastName0_,
       DATEPART(user0_.dw, user0_.JoinDate) - 1 as formula0_, --- همان فرمول تعریف شده است
       user0_.FirstName + ' ' + user0_.LastName as formula1_ ---از طریق فرمول تعریف شده حاصل گردیده است
   from
       Users user0_

  <runtime>
   <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
     <dependentAssembly>
       <assemblyIdentity name="NHibernate"
                         publicKeyToken="aa95f207798dfdb4"
                         culture="neutral" />
       <bindingRedirect oldVersion="3.0.0.4000"
                        newVersion="3.1.0.4000"/>
     </dependentAssembly>
   </assemblyBinding>
 </runtime>

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