How to model this classes withN Hibernate and Fluent.NHibernate Maps? - nhibernate

I'm using ASP.NET MVC with NHibernate and Fluent.NHibernate Maps.
I would like to know how to map the classes on Fluent and to create the database tables on my MySQL:
public class AgenteDeViagem {
public virtual int Id { get; set; }
public virtual string Email { get; set; }
public virtual AgentePessoa AgentePessoa { get; set; }
}
public interface AgentePessoa {
}
public class AgenteDeViagemPJ:AgentePessoa {
public virtual int Id { get; set; }
public virtual AgenteDeViagem AgenteDeViagem { get; set; }
public virtual string Razao { get; set; }
}
public class AgenteDeViagemPF:AgentePessoa {
public virtual int Id { get; set; }
public virtual AgenteDeViagem AgenteDeViagem { get; set; }
public virtual string Nome { get; set; }
}
Thank you very much!

Looks to me like you're halfway there. You're already using virtual and relations are set, so using the Automapping strategy, you only need to build the session factory:
private static ISessionFactory InitializeNHibernate()
{
var cfg = Fluently.Configure()
.Database(MySQLConfiguration.Standard.ConnectionString(c =>
c.Database("agente").Server("localhost")
.Username("user").Password("password")))
.Mappings(m => m.FluentMappings.AddFromAssemblyOf<AgenteDeViagem>())
.ExposeConfiguration(configuration =>
{
// Comment to disable schema generation
BuildDatabaseSchema(configuration);
});
return cfg.BuildSessionFactory;
}
private static void BuildDatabaseSchema(Configuration configuration)
{
var schemaExport = new SchemaExport(configuration);
schemaExport.SetOutputFile("mysql_script.sql");
schemaExport.Create(false, true);
}

Related

Setting up Automapper 5.1

I am having trouble following the wiki in this instance. I wanted to use Automapper 5.2. I cannot find a simple end for end example that shows a solid configuration with context. By context I mean where do you put the config files and whats the difference between static and instance api?
I checked out the DNRTV download but it deals with the 1.0 version.
How do you set this package up? I have a model called Client as below.
public class Client : IEntityBase
{
public Client()
{
Jobs = new List<Job>();
}
public int Id { get; set; }
public int ClientNo { get; set; }
public bool Company { get; set; }
public string CompanyName { get; set; }
public string ClientFirstName { get; set; }
public DateTime DeActivated { get; set; }
public bool Activity { get; set; }
public DateTime DateCreated { get; set; }
public DateTime DateUpdated { get; set; }
public int? StateId { get; set; }
public State State { get; set; }
public int CreatorId { get; set; }
public User Creator { get; set; }
public ICollection<Job> Jobs { get; set; }
}
and a ClientViewModel as so:
public class ClientViewModel
{
public int Id { get; set; }
public int ClientNo { get; set; }
public bool Company { get; set; }
public string CompanyName { get; set; }
public string ClientFirstName { get; set; }
public DateTime DeActivated { get; set; }
public bool Activity { get; set; }
public DateTime DateCreated { get; set; }
public DateTime DateUpdated { get; set; }
public int? StateId { get; set; }
public int CreatorId { get; set; }
public int[] Jobs { get; set; }
}
I am unsure how to set AutoMapper up with regard to configuration. That is, they talk about a global.asax file and I am using aspnet core.. there is no Global.asax file..
What do you put in the Startup.cs file if anything.
Given these two files above what do I need to do to use Automapper with them?
Regards
Here is the steps to configure the automapper in asp.net core mvc.
1. Create the mapping profile class which extends from Profile
public class ClientMappingProfile : Profile
{
public ClientMappingProfile ()
{
CreateMap<Client, ClientViewModel>().ReverseMap();
}
}
2. Create the AutoMapper Configuration Class and add your mapping profile class here.
public class AutoMapperConfiguration
{
public MapperConfiguration Configure()
{
var config = new MapperConfiguration(cfg =>
{
cfg.AddProfile<ClientMappingProfile>();
});
return config;
}
}
3. Create extension method so, we can add this to Startup.cs ConfigureServices method
public static class CustomMvcServiceCollectionExtensions
{
public static void AddAutoMapper(this IServiceCollection services)
{
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
var config = new AutoMapperConfiguration().Configure();
services.AddSingleton<IMapper>(sp => config.CreateMapper());
}
}
4. Call the extension method in Startup.cs ConfigureServices method
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<DBContext>(options =>options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
services.AddMvc();
services.AddAutoMapper();
}

fluent NHibernate many to many creates additional table

I have two tables "recall" and "service" and I need many to many between them.
I use fluent NHibernate mapping but it creates additional table with name "servicetorecall"
public class Recall : BaseDomain
{
public virtual string Name { get; set; }
public virtual string PersonPosition { get; set; }
public virtual string RecallText { get; set; }
private ICollection<Service> _services = new List<Service>();
public virtual ICollection<Service> Services
{
get { return _services; }
set { _services = value; }
}
}
public class Service : BaseDomain
{
public virtual string Name { get; set; }
public virtual string Url { get; set; }
public virtual string ImgPath { get; set; }
public virtual string ShortContent { get; set; }
public virtual string Content { get; set; }
public virtual bool ServiceIsVisible { get; set; }
ICollection<Recall> _recalls = new List<Recall>();
public virtual ICollection<Recall> Recalls
{
get { return _recalls; }
set { _recalls = value; }
}
}
Mappings :
class RecallMappingOverride : IAutoMappingOverride<Recall>
{
public void Override(AutoMapping<Recall> mapping)
{
mapping.Cache.ReadWrite();
mapping.HasManyToMany(q => q.Services).Table(MappingNames.RECALLS_RELATIONS)
.ParentKeyColumn(MappingNames.RECALL_ID)
.ChildKeyColumn(MappingNames.SERVICE_ID).Inverse().Cascade.All();
}
}
public class ServiceMappingOverride : IAutoMappingOverride<Service>
{
public void Override(AutoMapping<Service> mapping)
{
mapping.Cache.ReadWrite();
mapping.HasManyToMany(q => q.Recalls).Table(MappingNames.RECALLS_RELATIONS) .ParentKeyColumn(MappingNames.SERVICE_ID).ChildKeyColumn(MappingNames.RECALL_ID)
.Inverse().Cascade.All();
}
}
I tried to change cascades but this didn't help. Also I did the same with other entities and it works correctly what type of magic is it?
How do you define "correct", what do you want to achieve?
I never heard of any clean solution for many to many relations which doesn't use pivot table.
[quick glimpse at your mappings]: only one of the "ManyToMany" should be Inverse

How to map a derived class using an EntityBase class on FluentNHibernate

I have an EntityBase class for FluentNHibernate:
public abstract class EntityBase<T>
{
public EntityBase()
{
}
public static T GetById(int id)
{
return (T)Hibernate.Session.Get<T>(id);
}
public virtual void Save()
{
using (var transaction = Hibernate.Session.BeginTransaction())
{
Hibernate.Session.SaveOrUpdate(this);
transaction.Commit();
}
}
public static IList<T> List()
{
return Hibernate.Session.CreateCriteria(typeof(T)).List<T>();
}
public static IList<T> ListTop(int i)
{
return Hibernate.Session.CreateCriteria(typeof(T)).SetMaxResults(i).List<T>();
}
public virtual void Delete()
{
using (var transaction = Hibernate.Session.BeginTransaction())
{
Hibernate.Session.Delete(this);
transaction.Commit();
}
}
}
I have a base member class also a table in database:
abstract public class BaseMember:EntityBase<BaseMember>
{
public virtual int Id { get; set; }
public virtual string Email { get; set; }
public virtual string Password { get; set; }
public virtual string RecordDate { get; protected set; }
public BaseMember()
{
}
}
I have another Member class that is deriving from BaseMember class:
public class IndividualMember : BaseMember
{
public virtual int Id { get; set; }
public virtual string FirstName { get; set; }
public virtual string LastName { get; set; }
public virtual string PhoneNumber { get; set; }
public virtual string MobilePhoneNumber { get; set; }
public virtual DateTime BirthDate { get; set; }
public virtual bool Gender { get; set; }
public virtual string ProfileImage { get; set; }
public virtual string AddressDefinition { get; set; }
public virtual string ZipCode { get; set; }
public virtual DateTime RecordDate { get; set; }
public IndividualMember()
{
}
}
How can I map those classes with BaseMember and IndividualMember tables in db?
There are different types of Inheritance mapping strategies in Fluent NHibernate.
You can use SubclassMap mapping for derived class.
Strategies : Table-per-class-hierarchy, Table-per-subclass and Table Per Concrete Class.
For table-per-class-hierarchy strategy, you just need to specify the discriminator column.
For more reference :
http://www.codeproject.com/Articles/232034/Inheritance-mapping-strategies-in-Fluent-Nhibernat
https://github.com/jagregory/fluent-nhibernate/wiki/Fluent-mapping#wiki-subclasses

Fluent NHibernate mapping using component

I have just started working on a project using Fluent NHibernate.
What is the correct way to map the following classes using Fluent NHibernate?
public class DurationUnit
{
public virtual int Id { get; set; }
public virtual string Name { get; set; }
}
public class Duration
{
public virtual int Value { get; set; }
public virtual DurationUnit Unit { get; set; }
public virtual int DurationInMinutes { get{ throw new NotImplementedException(); } }
}
public class Event
{
public virtual int Id { get; set; }
public virtual String Name { get; set; }
public virtual Duration MaxDuration { get; set; }
public virtual Duration MinDuration { get; set; }
}
My inital approach was to declare a ClassMap for DurationUnit and Event, with Duration as a component of Event. When trying this I received an exception:
NHibernate.MappingException: Could not determine type for:
Entities.DurationUnit
if your mapping looks like this
public EventMap()
{
Component(x => x.MaxDuration, c =>
{
c.Map(x => x.Value, "MaxDurationValue");
c.Reference(x => x.Unit, "MaxDurationUnitId");
});
}
then make sure class DurationUnitMap is public and is added to the configuration

Issue With Fluent Nhibernate Automapping and Guids / UniqueIdentifiers as Primary Key Fields

I am attempting to use the Fluent-NHibernate automapping functionality (in the latest version of the software) and am running into problems using Guids as the Primary Key fields. If I use integer fields for the primary keys, the tables are generated successfully and all Nhibernate functionality seems to work fine. FYI, I am using NHibernate to generate my database tables.
Here are a couple of classes with integer IDs.
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Reflection;
namespace Sample.Data.Entities
{
public class Employee
{
public virtual int Id { get; private set; }
public virtual string FirstName { get; set; }
public virtual string LastName { get; set; }
public virtual Store Store { get; set; }
}
public class Product
{
public virtual int Id { get; private set; }
public virtual string Name { get; set; }
public virtual double Price { get; set; }
public virtual IList<Store> StoresStockedIn { get; private set; }
public Product()
{
StoresStockedIn = new List<Store>();
}
}
public class Store
{
public virtual int Id { get; private set; }
public virtual string Name { get; set; }
public virtual IList<Product> Products { get; set; }
public virtual IList<Employee> Staff { get; set; }
public Store()
{
Products = new List<Product>();
Staff = new List<Employee>();
}
public virtual void AddProduct(Product product)
{
product.StoresStockedIn.Add(this);
Products.Add(product);
}
public virtual void AddEmployee(Employee employee)
{
employee.Store = this;
Staff.Add(employee);
}
}
}
Here are the same classes with GUIDs.
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Reflection;
namespace Sample.Data.Entities
{
public class Employee
{
public virtual Guid Id { get; private set; }
public virtual string FirstName { get; set; }
public virtual string LastName { get; set; }
public virtual Store Store { get; set; }
}
public class Product
{
public virtual Guid Id { get; private set; }
public virtual string Name { get; set; }
public virtual double Price { get; set; }
public virtual IList<Store> StoresStockedIn { get; private set; }
public Product()
{
StoresStockedIn = new List<Store>();
}
}
public class Store
{
public virtual Guid Id { get; private set; }
public virtual string Name { get; set; }
public virtual IList<Product> Products { get; set; }
public virtual IList<Employee> Staff { get; set; }
public Store()
{
Products = new List<Product>();
Staff = new List<Employee>();
}
public virtual void AddProduct(Product product)
{
product.StoresStockedIn.Add(this);
Products.Add(product);
}
public virtual void AddEmployee(Employee employee)
{
employee.Store = this;
Staff.Add(employee);
}
}
}
Here is my configuration.
return Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2008
.ConnectionString(c => c.FromConnectionStringWithKey("AAAConnectionString"))
.UseReflectionOptimizer()
.AdoNetBatchSize(25)
.DefaultSchema("dbo")
.Cache(c => c
.UseQueryCache()
.ProviderClass<HashtableCacheProvider>())
.ShowSql())
.Mappings(m=>m.AutoMappings
.Add(AutoMap.AssemblyOf<Sample.Data.Entities.Product>()
.Where(type => type.Namespace == "Sample.Data.Entities.Product")
.Conventions.AddFromAssemblyOf<Sample.Data.Fluent.Conventions.PrimaryKeyNameConvention>()
))
.ExposeConfiguration(BuildSchema)
.BuildSessionFactory();
To work around the issue, I attempted to generate conventions (see below) for 1) naming the Id field (although I thought it should have been unnecessary) and for 2) generating the Id (which I thought would have been automatic). I am unsure what is happening or why this is not working.
public class PrimaryKeyNameConvention : IIdConvention
{
public bool Accept(IIdentityInstance id)
{
return true;
}
public void Apply(IIdentityInstance id)
{
id.Column("Id");
}
}
public class PrimaryKeyGeneratorConvention : IIdConvention
{
public bool Accept(IIdentityInstance id)
{
return true;
}
public void Apply(IIdentityInstance id)
{
id.GeneratedBy.GuidComb();
}
}
Also, if I turn automapping off and use Fluently configured map the tables are generated successfully.
This is driving me nuts, and I am sure it is probably a quick fix. Any ideas?
Thank you!
Anthony
Apparently, there was an issue in the Fluent Nhibernate version 1.0RC and version 1.0. However, if you download the latest version from the SVN trunk, every thing works perfectly. It appears that the problem was simply a bug in the code which has now been corrected.
Also, I should note that James Gregory, Paul Batum, and perhaps others, are actively working on Fluent NHibernate. The product is evolving pretty dramatically and there have been significant changes to the code over the last couple of months.