I'm a newbie to Fluent Nhibernate (FNH) or NHibernate (or even ORMs) in general. I have a pet project that I'm using to learn FNH and I'm stuck with, what looks like a design issue. Its a basic Library Management System and I have objects like books, users, booksize(!) etc. For instance, I have a BookSize class and its manager BookSizesManager which hold a list of BookSize objects. Could please anyone advise me how to go about creating ClassMap for both of them such that my database (for testing purpose, say a SQLite database) would have only one table called 'BookSizes' and would list all the BookSize objects in BookSizeManager?
My current implementation is as followed and flawed as it produces two tables 1. BookSize 2. BookSizes (from BookSizeManager Map).
My BookSize Class
public class BookSize
{
public virtual string ID { get; set; }
public virtual string Name { get; set; }
public virtual double Length { get; set; }
public virtual double Width { get; set; }
}
Corresponding ClassMap
public class BookSizeMap : ClassMap<BookSize>
{
public BookSizeMap()
{
Id(x => x.ID);
Map(x => x.Name);
Map(x => x.Length);
Map(x => x.Width);
}
}
My BookSizesManager Class
public class BookSizesManager
{
public virtual string Id { get; set; }
private IList<BookSize> m_bookSizes = new List<BookSize>();
public virtual IList<BookSize> Items
{
get { return new ReadOnlyCollection<BookSize>(m_bookSizes); }
set { if(value != null) m_bookSizes = value; }
}
public virtual void Add(BookSize size)
{
if (size != null)
{
m_bookSizes.Add(size);
}
}// Also contains other unimplemented CRUD methods, but haven't listed them here to reduce 'noise'
}
Corresponding ClassMap
public class BookSizesManagerMap : ClassMap<BookSizesManager>
{
public BookSizesManagerMap()
{
Id(x => x.Id);
HasMany(x => x.Items)
.Cascade.All();
Table("BookSizes");
}
}
Any help is greatly appreciated. Thanks in advance.
i would get rid of BookSizesManager completly and use the session directly and specify the tablename explicitly
public class BookSizeMap : ClassMap<BookSize>
{
public BookSizeMap()
{
Table("BookSizes");
...
}
}
BookSizesManager.Add(booksize); becomes session.Save(booksize);
BookSizesManager.Get(booksizeId); becomes session.Get(booksizeId);
Related
I'm trying to add a view as a Navigation Property of an entity.
public class Schedule
{
public int Id { get; set; }
public decimal ScheduledQuantity { get; set; }
public ScheduleDetails ScheduleDetails { get; set; }
}
public class ScheduleDetails
{
public int ScheduleId { get; set; }
public decimal BadQuantity { get; set; }
public Schedule Schedule { get; set; }
}
with mappings:
public class ScheduleDetailMap : IEntityTypeConfiguration<ScheduleDetails>
{
public void Configure(EntityTypeBuilder<ScheduleDetails> builder)
{
builder.ToView("vwScheduleDetails", "ShopOrders");
builder.HasKey(t => t.ScheduleId);
builder.HasOne(p => p.Schedule).WithOne(s => s.ScheduleDetails);
}
}
public class ScheduleMap : IEntityTypeConfiguration<Schedule>
{
public void Configure(EntityTypeBuilder<Schedule> builder)
{
builder.ToTable("Schedules");
builder.HasKey(t => t.Id);
builder.Property(t => t.Id).UseIdentityColumn();
}
}
when I query it works fine. However if I add a new Schedule record.
var schedule = new Schedule
{
ScheduledQuantity = 100,
ScheduleDetails = new ScheduleDetails()
};
context.Schedules.Add(schedule);
context.SaveChanges();
I get an exception saying " The entity type 'ScheduleDetails' is not mapped to a table, therefore the entities cannot be persisted to the database. Use 'ToTable' in 'OnModelCreating' to map it."
Is there anyway to get EF to ignore saving this 'entity'?
This is kind of an old question, but for anyone having similar issues - in my case the problem lied in navigation properties in my view. I had some leftover properties in view's class, because its code was copied from other entity. By removing those properties, the error was gone.
This doesn't really help if you want to use navigation properties in your code, but it may help someone to continue their search.
I am using AutoMapper 6.2.0 in my ASP.NET MVC 5 application.
When I call my view through controller it shows all things right. But, when I refresh that view, Visual Studio shows an error:
System.InvalidOperationException: 'Mapper already initialized. You must call Initialize once per application domain/process.'
I am using AutoMapper only in one controller. Not made any configuration in any place yet nor used AutoMapper in any other service or controller.
My controller:
public class StudentsController : Controller
{
private DataContext db = new DataContext();
// GET: Students
public ActionResult Index([Form] QueryOptions queryOptions)
{
var students = db.Students.Include(s => s.Father);
AutoMapper.Mapper.Initialize(cfg =>
{
cfg.CreateMap<Student, StudentViewModel>();
});
return View(new ResulList<StudentViewModel> {
QueryOptions = queryOptions,
Model = AutoMapper.Mapper.Map<List<Student>,List<StudentViewModel>>(students.ToList())
});
}
// Other Methods are deleted for ease...
Error within controller:
My Model class:
public class Student
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public string CNIC { get; set; }
public string FormNo { get; set; }
public string PreviousEducaton { get; set; }
public string DOB { get; set; }
public int AdmissionYear { get; set; }
public virtual Father Father { get; set; }
public virtual Sarparast Sarparast { get; set; }
public virtual Zamin Zamin { get; set; }
public virtual ICollection<MulaqatiMehram> MulaqatiMehram { get; set; }
public virtual ICollection<Result> Results { get; set; }
}
My ViewModel Class:
public class StudentViewModel
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public string CNIC { get; set; }
public string FormNo { get; set; }
public string PreviousEducaton { get; set; }
public string DOB { get; set; }
public int AdmissionYear { get; set; }
public virtual FatherViewModel Father { get; set; }
public virtual SarparastViewModel Sarparast { get; set; }
public virtual ZaminViewModel Zamin { get; set; }
}
If you want/need to stick with the static implementation in a unit testing scenario, note that you can call AutoMapper.Mapper.Reset() before calling initialize. Do note that this should not be used in production code as noted in the documentation.
Source: AutoMapper documentation.
When you refresh the view you are creating a new instance of the StudentsController -- and therefore reinitializing your Mapper -- resulting in the error message "Mapper already initialized".
From the Getting Started Guide
Where do I configure AutoMapper?
If you're using the static Mapper method, configuration should only happen once per AppDomain. That means the best place to put the configuration code is in application startup, such as the Global.asax file for ASP.NET applications.
One way to set this up is to place all of your mapping configurations into a static method.
App_Start/AutoMapperConfig.cs:
public class AutoMapperConfig
{
public static void Initialize()
{
Mapper.Initialize(cfg =>
{
cfg.CreateMap<Student, StudentViewModel>();
...
});
}
}
Then call this method in the Global.asax.cs
protected void Application_Start()
{
App_Start.AutoMapperConfig.Initialize();
}
Now you can (re)use it in your controller actions.
public class StudentsController : Controller
{
public ActionResult Index(int id)
{
var query = db.Students.Where(...);
var students = AutoMapper.Mapper.Map<List<StudentViewModel>>(query.ToList());
return View(students);
}
}
I've used this method before and it worked till version 6.1.1
Mapper.Initialize(cfg => cfg.CreateMap<ContactModel, ContactModel>()
.ConstructUsing(x => new ContactModel(LoggingDelegate))
.ForMember(x => x.EntityReference, opt => opt.Ignore())
);
Since version 6.2, this doesn't work any more. To correctly use Automapper create a new Mapper and us this one like this:
var mapper = new MapperConfiguration(cfg => cfg.CreateMap<ContactModel, ContactModel>()
.ConstructUsing(x => new ContactModel(LoggingDelegate))
.ForMember(x => x.EntityReference, opt => opt.Ignore())).CreateMapper();
var model = mapper.Map<ContactModel>(this);
In case you really need to "re-initialize" AutoMapper you should switch to the instance based API to avoid System.InvalidOperationException: Mapper already initialized. You must call Initialize once per application domain/process.
For example, when you are creating the TestServer for xUnit tests you can just set ServiceCollectionExtensions.UseStaticRegistration inside fixure class constructor to false to make the trick:
public TestServerFixture()
{
ServiceCollectionExtensions.UseStaticRegistration = false; // <-- HERE
var hostBuilder = new WebHostBuilder()
.UseEnvironment("Testing")
.UseStartup<Startup>();
Server = new TestServer(hostBuilder);
Client = Server.CreateClient();
}
For Unit Testing, you can add Mapper.Reset() to your unit test class
[TearDown]
public void TearDown()
{
Mapper.Reset();
}
You can use automapper as Static API and Instance API ,
Mapper already initialized is common issue in Static API , you can use mapper.Reset()
where you initialized mapper but this this not an answer at all.
Just try with instance API
var students = db.Students.Include(s => s.Father);
var config = new MapperConfiguration(cfg => {
cfg.CreateMap<Student, StudentViewModel>();
});
IMapper iMapper = config.CreateMapper();
return iMapper.Map<List<Student>, List<StudentViewModel>>(students);
Automapper 8.0.0 version
AutoMapper.Mapper.Reset();
Mapper.Initialize(
cfg => {
cfg.CreateMap<sourceModel,targetModel>();
}
);
You can simply use Mapper.Reset().
Example:
public static TDestination MapToObject<TSource, TDestination>(TSource Obj)
{
Mapper.Initialize(cfg => cfg.CreateMap<TSource, TDestination>());
TDestination tDestination = Mapper.Map<TDestination>(Obj);
Mapper.Reset();
return tDestination;
}
If you are using MsTest you can use the AssemblyInitialize attribute so that mapping gets configured only once for that assembly (here test assembly). This is generally added into to the base class of controller unit tests.
[TestClass]
public class BaseUnitTest
{
[AssemblyInitialize]
public static void AssemblyInit(TestContext context)
{
AutoMapper.Mapper.Initialize(cfg =>
{
cfg.CreateMap<Source, Destination>()
.ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.EmailAddress));
});
}
}
I hope this answer helps
If you are using Mapper in UnitTest and your tests more then one, You may use Mapper.Reset()
`
//Your mapping.
public static void Initialize()
{
Mapper.Reset();
Mapper.Initialize(cfg =>
{
cfg.CreateMap<***>
}
//Your test classes.
[TestInitialize()]
public void Initialize()
{
AutoMapping.Initialize();
}`
private static bool _mapperIsInitialized = false;
public InventoryController()
{
if (!_mapperIsInitialized)
{
_mapperIsInitialized = true;
Mapper.Initialize(
cfg =>
{
cfg.CreateMap<Inventory, Inventory>()
.ForMember(x => x.Orders, opt => opt.Ignore());
}
);
}
}
I've been stuck with below exception from OnModelCreating() in DBContext and struggling to find the cause or a solution. Can't find much help online either.
{System.MissingMethodException: Method not found: 'System.Nullable`1<Int32> Models.Application.get_AddrSeqNum()'. at Data.Configuration.ApplicationConfiguration..ctor()
Any help or ideas please?
Details:
I've two entity types 'Application' and 'Organization' and their Entity Type Configurations as below:
public class Application
{
public int ApplId { get; set; }
public int? OrganizationId { get; set; } // Compsite FK (maps to ExternalId in Organization)
public int? AddrSeqNum { get; set; } // Compsite FK (maps to AddrSeqNum)
public virtual Organization Organization { get; set; }
}
public class Organization
{
public int Id { get; set; }
/// <summary>
/// Organization ID
/// </summary>
public int ExternalId { get; set; }
public int AddrSeqNum { get; set; }
}
public class ApplicationConfiguration : EntityTypeConfiguration<Application>
{
ToTable("Application");
HasKey(e => e.ApplId)
.Property(e => e.ApplId)
.HasColumnName("appl_id")
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);
Property(e => e.AddrSeqNum)
.HasColumnName("addr_seq_num");
// Relationship
HasOptional(e => e.Organization)
.WithMany()
.HasForeignKey(e => new { e.OrganizationId, e.AddrSeqNum });
}
public class OrganizationConfiguration : EntityTypeConfiguration<Organization>
{
public OrganizationConfiguration()
{
ToTable("Organization");
HasKey(e => new { e.ExternalId, e.AddrSeqNum }); // Compsite Unique key in table
Property(e => e.ExternalId)
.HasColumnName("external_id");
Property(e => e.AddrSeqNum)
.HasColumnName("addr_sequence");
Property(e => e.Id)
.HasColumnName("Id") // Primary key (auto increment)
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
}
}
DBContext:
public partial class AppDbContext : DbContext
{
public AppDbContext ()
{
Configuration.LazyLoadingEnabled = true;
Configuration.ProxyCreationEnabled = false;
//Configuration.AutoDetectChangesEnabled = false;
DbInterception.Add(new FtsInterceptor());
Database.Log = (msg) => Logger.Debug(msg);
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Configurations // <<- Exception from here
.Add(new ApplicationConfiguration())
.Add(new OrganizationConfiguration())
base.OnModelCreating(modelBuilder);
}
}
It was a weird situation, the references to the project that has my pocos were out of sync and were not getting rebuilt when I built my solution. One of the project is a Workflow console app targeting x86 platform. I changed to AnyCPU for all the projects in my sln. And magically ot worked again.
I was trying to add a new column/property to ine of my poco entity.
I was having this problem too, because I made a nullable database column non-nullable and Visual Studio didn't seem to want to cooperate with the change.
Deleting bin and obj folders, as well as rebuilding, didn't seem to do it.
As a workaround, I just made it nullable again. It's interesting because I'm not sure where VS is caching the nullable part--a question to be answered when I'm under less tight deadlines. :)
TL;DR;
NHibernate reverse relationship is working on Azure-SQL and MSSQL2012 but not with SQLite
Description:
I am currently Unittesting my Asp.Net MVC App and set up my Unittest with FluentMigrator on SQLite.
After creating the Database I set up some base entries I need.
One of those is a Product.
A Product has many ProductSuppliers and a ProductSupplier has many ProductSupplierPrices
public class Product
{
public virtual long Id { get; set; }
public virtual string Number { get; set; }
public virtual string Name { get; set; }
public virtual string Description { get; set; }
//more properties
public virtual IList<ProductSupplier> Suppliers { get; set; }
//more properties
}
public class ProductSupplier
{
public virtual long Id { get; set; }
public virtual Product Product { get; set; }
public virtual Supplier Supplier { get; set; }
public virtual IList<ProductSupplierPrice> Prices { get; set; }
}
public class ProductSupplierPrice : IHaveId
{
public virtual long Id { get; set; }
public virtual ProductSupplier ProductSupplier { get; set; }
public virtual decimal FromAmount { get; set; }
public virtual decimal Price { get; set; }
}
Setup:
Create Supplier
Create Product
Create ProductSupplier
Create ProductSupplierPrice
Test:
Product product = this.session.Load<Product>((long)1);
ProductSupplier productSupplier = product.Suppliers.First(); //<-- Suppliers are null; therefore throws an exception
If I load them seperately to check the relationships:
productSupplierPrice.ProductSupplier <--- Correct Supplier
productSupplier.Prices <-- Null
productSupplier.Product <-- Product with Id 1
product.Suppliers <-- Null
So to me it seems, that the many-to-one direction works correctely, but the one-to-many (reverse relation) is not working.
The Problem exists only in my Unittest (SQLite) the App itself runs on Azure-SQL and is working fine.
EDIT:
Mappings with FluentnHibernate
public class ProductMap : ClassMap<Product>
{
public ProductMap()
{
Id(x => x.Id);
HasMany(x => x.Suppliers).Inverse().Cascade.DeleteOrphan().BatchSize(20);
//many more mappings
}
}
public ProductSupplierMap()
{
Id(x => x.Id);
References(x => x.Product);
References(x => x.Supplier);
Map(x => x.IsMainSupplier);
Map(x => x.SupplierProductNumber);
Map(x => x.CopperSurcharge);
HasMany(x => x.Prices).Inverse().Cascade.DeleteOrphan().BatchSize(20);
}
public ProductSupplierPriceMap()
{
Id(x => x.Id);
References(x => x.ProductSupplier);
Map(x => x.FromAmount);
Map(x => x.Price);
}
Edit2 - Creating the DB-Entries:
Product product = new Product()
{
Type = ProductType.Purchase,
Dispatcher = session.Load<Employee>(employeeId),
Number = "100.10-1000",
Name = "Testproduct",
//Lots of Properties
Suppliers = new List<ProductSupplier>()
};
session.SaveOrUpdate(product);
ProductSupplier productSupplier = new ProductSupplier()
{
Product = product,
Supplier = session.Load<Supplier>((long)1),
IsMainSupplier = true,
SupplierProductNumber = "Artikel123456",
CopperSurcharge = CopperSurchargeType.DEL700,
Prices = new List<ProductSupplierPrice>()
};
session.Save(productSupplier);
ProductSupplierPrice productSupplierPrice = new ProductSupplierPrice()
{
ProductSupplier = productSupplier,
FromAmount = 1,
Price = 5
};
session.Save(productSupplierPrice);
EDIT 3.1:
public static ISession InitializeDatabase()
{
NHibernateSessionHolder.CreateSessionFactory();
session = NHibernateSessionHolder.OpenSession();
CreateBaseEntries(); //Creates Employees, Supplier, Customer etc
return session;
}
Based on the Ayende's article you need to clear the session between insert/update and querying:
session.Clear();
Seems to be a session management, I'm not sure why the session should be clean, but the session is providing your original instance (the same you provided for saving, stored on the session cache) instead a proxy for lazy-loading.
private long CreatePurchaseOrder()
{
session.Clear();
var product = this.session.Load<Product>((long)1);
var productSupplier = product.Suppliers.First();
var productSupplierPrice = productSupplier.Prices.First();
return 0;
}
Sorry for late reply
In your unit test, you are using same session for creating and fetching entities. This is not right as subsequent fetch returns entities from first level cache which do not have their graph set up properly.
So....either use different sessions OR as a quick fix, I have added "session.Clear()" in the method "InitializeDatabase()" of "DatabaseSetUpHelper". Clearing the session clears first level cache and force NH to fetch data from DB again and the resulting entities have their graph set up properly.
public static ISession InitializeDatabase()
{
NHibernateSessionHolder.CreateSessionFactory();
session = NHibernateSessionHolder.OpenSession();
CreateBaseEntries();
session.Clear(); // notice this!!! this clears first level cache of session, thus forcing fetching of data from DB
return session;
}
Note: My quick-fix is not final solution, it is there just show how session behaves. In proper solution, you must use different sessions.
I am working with Entity Framework Code First and MVC 5. When I created my application with Individual User Accounts Authentication I was given an Account controller and along with it all the required classes and code that is needed to get the Indiv User Accounts authentication to work.
Among the code already in place was this:
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext() : base("DXContext", throwIfV1Schema: false)
{
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
}
But then I went ahead and created my own context using code first, so I now have the following too:
public class DXContext : DbContext
{
public DXContext() : base("DXContext")
{
}
public DbSet<ApplicationUser> Users { get; set; }
public DbSet<IdentityRole> Roles { get; set; }
public DbSet<Artist> Artists { get; set; }
public DbSet<Paintings> Paintings { get; set; }
}
Finally I have the following seed method to add some data for me to work with whilst developing:
protected override void Seed(DXContext context)
{
try
{
if (!context.Roles.Any(r => r.Name == "Admin"))
{
var store = new RoleStore<IdentityRole>(context);
var manager = new RoleManager<IdentityRole>(store);
var role = new IdentityRole { Name = "Admin" };
manager.Create(role);
}
context.SaveChanges();
if (!context.Users.Any(u => u.UserName == "James"))
{
var store = new UserStore<ApplicationUser>(context);
var manager = new UserManager<ApplicationUser>(store);
var user = new ApplicationUser { UserName = "James" };
manager.Create(user, "ChangeAsap1#");
manager.AddToRole(user.Id, "Admin");
}
context.SaveChanges();
string userId = "";
userId = context.Users.FirstOrDefault().Id;
var artists = new List<Artist>
{
new Artist { FName = "Salvador", LName = "Dali", ImgURL = "http://i62.tinypic.com/ss8txxn.jpg", UrlFriendly = "salvador-dali", Verified = true, ApplicationUserId = userId },
};
artists.ForEach(a => context.Artists.Add(a));
context.SaveChanges();
var paintings = new List<Painting>
{
new Painting { Title = "The Persistence of Memory", ImgUrl = "http://i62.tinypic.com/xx8tssn.jpg", ArtistId = 1, Verified = true, ApplicationUserId = userId }
};
paintings.ForEach(p => context.Paintings.Add(p));
context.SaveChanges();
}
catch (DbEntityValidationException ex)
{
foreach (var validationErrors in ex.EntityValidationErrors)
{
foreach (var validationError in validationErrors.ValidationErrors)
{
Trace.TraceInformation("Property: {0} Error: {1}", validationError.PropertyName, validationError.ErrorMessage);
}
}
}
}
My solution builds fine, but when I try and access a controller that requires access to the database I get the following error:
DX.DOMAIN.Context.IdentityUserLogin: : EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType.
DX.DOMAIN.Context.IdentityUserRole: : EntityType 'IdentityUserRole' has no key defined. Define the key for this EntityType.
What am I doing wrong? Is it because I have two contexts?
UPDATE
After reading Augusto's reply, I went with Option 3. Here is what my DXContext class looks like now:
public class DXContext : DbContext
{
public DXContext() : base("DXContext")
{
// remove default initializer
Database.SetInitializer<DXContext>(null);
Configuration.LazyLoadingEnabled = false;
Configuration.ProxyCreationEnabled = false;
}
public DbSet<User> Users { get; set; }
public DbSet<Role> Roles { get; set; }
public DbSet<Artist> Artists { get; set; }
public DbSet<Painting> Paintings { get; set; }
public static DXContext Create()
{
return new DXContext();
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Entity<User>().ToTable("Users");
modelBuilder.Entity<Role>().ToTable("Roles");
}
public DbQuery<T> Query<T>() where T : class
{
return Set<T>().AsNoTracking();
}
}
I also added a User.cs and a Role.cs class, they look like this:
public class User
{
public int Id { get; set; }
public string FName { get; set; }
public string LName { get; set; }
}
public class Role
{
public int Id { set; get; }
public string Name { set; get; }
}
I wasn't sure if I would need a password property on the user, since the default ApplicationUser has that and a bunch of other fields!
Anyways, the above change builds fine, but again I get this error when the application is ran:
Invalid Column name UserId
UserId is an integer property on my Artist.cs
In my case I had inherited from the IdentityDbContext correctly (with my own custom types and key defined) but had inadvertantly removed the call to the base class's OnModelCreating:
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder); // I had removed this
/// Rest of on model creating here.
}
Which then fixed up my missing indexes from the identity classes and I could then generate migrations and enable migrations appropriately.
The problem is that your ApplicationUser inherits from IdentityUser, which is defined like this:
IdentityUser : IdentityUser<string, IdentityUserLogin, IdentityUserRole, IdentityUserClaim>, IUser
....
public virtual ICollection<TRole> Roles { get; private set; }
public virtual ICollection<TClaim> Claims { get; private set; }
public virtual ICollection<TLogin> Logins { get; private set; }
and their primary keys are mapped in the method OnModelCreating of the class IdentityDbContext:
modelBuilder.Entity<TUserRole>()
.HasKey(r => new {r.UserId, r.RoleId})
.ToTable("AspNetUserRoles");
modelBuilder.Entity<TUserLogin>()
.HasKey(l => new {l.LoginProvider, l.ProviderKey, l.UserId})
.ToTable("AspNetUserLogins");
and as your DXContext doesn't derive from it, those keys don't get defined.
If you dig into the sources of Microsoft.AspNet.Identity.EntityFramework, you will understand everything.
I came across this situation some time ago, and I found three possible solutions (maybe there are more):
Use separate DbContexts against two different databases or the same database but different tables.
Merge your DXContext with ApplicationDbContext and use one database.
Use separate DbContexts against the same table and manage their migrations accordingly.
Option 1:
See update the bottom.
Option 2:
You will end up with a DbContext like this one:
public class DXContext : IdentityDbContext<User, Role,
int, UserLogin, UserRole, UserClaim>//: DbContext
{
public DXContext()
: base("name=DXContext")
{
Database.SetInitializer<DXContext>(null);// Remove default initializer
Configuration.ProxyCreationEnabled = false;
Configuration.LazyLoadingEnabled = false;
}
public static DXContext Create()
{
return new DXContext();
}
//Identity and Authorization
public DbSet<UserLogin> UserLogins { get; set; }
public DbSet<UserClaim> UserClaims { get; set; }
public DbSet<UserRole> UserRoles { get; set; }
// ... your custom DbSets
public DbSet<RoleOperation> RoleOperations { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
// Configure Asp Net Identity Tables
modelBuilder.Entity<User>().ToTable("User");
modelBuilder.Entity<User>().Property(u => u.PasswordHash).HasMaxLength(500);
modelBuilder.Entity<User>().Property(u => u.Stamp).HasMaxLength(500);
modelBuilder.Entity<User>().Property(u => u.PhoneNumber).HasMaxLength(50);
modelBuilder.Entity<Role>().ToTable("Role");
modelBuilder.Entity<UserRole>().ToTable("UserRole");
modelBuilder.Entity<UserLogin>().ToTable("UserLogin");
modelBuilder.Entity<UserClaim>().ToTable("UserClaim");
modelBuilder.Entity<UserClaim>().Property(u => u.ClaimType).HasMaxLength(150);
modelBuilder.Entity<UserClaim>().Property(u => u.ClaimValue).HasMaxLength(500);
}
}
Option 3:
You will have one DbContext equal to the option 2. Let's name it IdentityContext. And you will have another DbContext called DXContext:
public class DXContext : DbContext
{
public DXContext()
: base("name=DXContext") // connection string in the application configuration file.
{
Database.SetInitializer<DXContext>(null); // Remove default initializer
Configuration.LazyLoadingEnabled = false;
Configuration.ProxyCreationEnabled = false;
}
// Domain Model
public DbSet<User> Users { get; set; }
// ... other custom DbSets
public static DXContext Create()
{
return new DXContext();
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
// IMPORTANT: we are mapping the entity User to the same table as the entity ApplicationUser
modelBuilder.Entity<User>().ToTable("User");
}
public DbQuery<T> Query<T>() where T : class
{
return Set<T>().AsNoTracking();
}
}
where User is:
public class User
{
public int Id { get; set; }
[Required, StringLength(100)]
public string Name { get; set; }
[Required, StringLength(128)]
public string SomeOtherColumn { get; set; }
}
With this solution, I'm mapping the entity User to the same table as the entity ApplicationUser.
Then, using Code First Migrations you'll need to generate the migrations for the IdentityContext and THEN for the DXContext, following this great post from Shailendra Chauhan: Code First Migrations with Multiple Data Contexts
You'll have to modify the migration generated for DXContext. Something like this depending on which properties are shared between ApplicationUser and User:
//CreateTable(
// "dbo.User",
// c => new
// {
// Id = c.Int(nullable: false, identity: true),
// Name = c.String(nullable: false, maxLength: 100),
// SomeOtherColumn = c.String(nullable: false, maxLength: 128),
// })
// .PrimaryKey(t => t.Id);
AddColumn("dbo.User", "SomeOtherColumn", c => c.String(nullable: false, maxLength: 128));
and then running the migrations in order (first the Identity migrations) from the global.asax or any other place of your application using this custom class:
public static class DXDatabaseMigrator
{
public static string ExecuteMigrations()
{
return string.Format("Identity migrations: {0}. DX migrations: {1}.", ExecuteIdentityMigrations(),
ExecuteDXMigrations());
}
private static string ExecuteIdentityMigrations()
{
IdentityMigrationConfiguration configuration = new IdentityMigrationConfiguration();
return RunMigrations(configuration);
}
private static string ExecuteDXMigrations()
{
DXMigrationConfiguration configuration = new DXMigrationConfiguration();
return RunMigrations(configuration);
}
private static string RunMigrations(DbMigrationsConfiguration configuration)
{
List<string> pendingMigrations;
try
{
DbMigrator migrator = new DbMigrator(configuration);
pendingMigrations = migrator.GetPendingMigrations().ToList(); // Just to be able to log which migrations were executed
if (pendingMigrations.Any())
migrator.Update();
}
catch (Exception e)
{
ExceptionManager.LogException(e);
return e.Message;
}
return !pendingMigrations.Any() ? "None" : string.Join(", ", pendingMigrations);
}
}
This way, my n-tier cross-cutting entities don't end up inheriting from AspNetIdentity classes, and therefore I don't have to import this framework in every project where I use them.
Sorry for the extensive post. I hope it could offer some guidance on this. I have already used options 2 and 3 in production environments.
UPDATE: Expand Option 1
For the last two projects I have used the 1st option: having an AspNetUser class that derives from IdentityUser, and a separate custom class called AppUser. In my case, the DbContexts are IdentityContext and DomainContext respectively. And I defined the Id of the AppUser like this:
public class AppUser : TrackableEntity
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
// This Id is equal to the Id in the AspNetUser table and it's manually set.
public override int Id { get; set; }
(TrackableEntity is the custom abstract base class that I use in the overridden SaveChanges method of my DomainContext context)
I first create the AspNetUser and then the AppUser. The drawback with this approach is that you have ensured that your "CreateUser" functionality is transactional (remember that there will be two DbContexts calling SaveChanges separately). Using TransactionScope didn't work for me for some reason, so I ended up doing something ugly but that works for me:
IdentityResult identityResult = UserManager.Create(aspNetUser, model.Password);
if (!identityResult.Succeeded)
throw new TechnicalException("User creation didn't succeed", new LogObjectException(result));
AppUser appUser;
try
{
appUser = RegisterInAppUserTable(model, aspNetUser);
}
catch (Exception)
{
// Roll back
UserManager.Delete(aspNetUser);
throw;
}
(Please, if somebody comes with a better way of doing this part I appreciate commenting or proposing an edit to this answer)
The benefits are that you don't have to modify the migrations and you can use any crazy inheritance hierarchy over the AppUser without messing with the AspNetUser. And actually, I use Automatic Migrations for my IdentityContext (the context that derives from IdentityDbContext):
public sealed class IdentityMigrationConfiguration : DbMigrationsConfiguration<IdentityContext>
{
public IdentityMigrationConfiguration()
{
AutomaticMigrationsEnabled = true;
AutomaticMigrationDataLossAllowed = false;
}
protected override void Seed(IdentityContext context)
{
}
}
This approach also has the benefit of avoiding to have your n-tier cross-cutting entities inheriting from AspNetIdentity classes.
By Changing The DbContext As Below;
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
modelBuilder.Conventions.Remove<ManyToManyCascadeDeleteConvention>();
}
Just adding in OnModelCreating method call to base.OnModelCreating(modelBuilder); and it becomes fine. I am using EF6.
Special Thanks To #The Senator
For those who use ASP.NET Identity 2.1 and have changed the primary key from the default string to either int or Guid, if you're still getting
EntityType 'xxxxUserLogin' has no key defined. Define the key for this EntityType.
EntityType 'xxxxUserRole' has no key defined. Define the key for this EntityType.
you probably just forgot to specify the new key type on IdentityDbContext:
public class AppIdentityDbContext : IdentityDbContext<
AppUser, AppRole, int, AppUserLogin, AppUserRole, AppUserClaim>
{
public AppIdentityDbContext()
: base("MY_CONNECTION_STRING")
{
}
......
}
If you just have
public class AppIdentityDbContext : IdentityDbContext
{
......
}
or even
public class AppIdentityDbContext : IdentityDbContext<AppUser>
{
......
}
you will get that 'no key defined' error when you are trying to add migrations or update the database.
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
//foreach (var relationship in modelBuilder.Model.GetEntityTypes().SelectMany(e => e.GetForeignKeys()))
// relationship.DeleteBehavior = DeleteBehavior.Restrict;
modelBuilder.Entity<User>().ToTable("Users");
modelBuilder.Entity<IdentityRole<string>>().ToTable("Roles");
modelBuilder.Entity<IdentityUserToken<string>>().ToTable("UserTokens");
modelBuilder.Entity<IdentityUserClaim<string>>().ToTable("UserClaims");
modelBuilder.Entity<IdentityUserLogin<string>>().ToTable("UserLogins");
modelBuilder.Entity<IdentityRoleClaim<string>>().ToTable("RoleClaims");
modelBuilder.Entity<IdentityUserRole<string>>().ToTable("UserRoles");
}
}
My issue was similar - I had a new table i was creating that ahd to tie in to the identity users. After reading the above answers, realized it had to do with IsdentityUser and the inherited properites. I already had Identity set up as its own Context, so to avoid inherently tying the two together, rather than using the related user table as a true EF property, I set up a non-mapped property with the query to get the related entities. (DataManager is set up to retrieve the current context in which OtherEntity exists.)
[Table("UserOtherEntity")]
public partial class UserOtherEntity
{
public Guid UserOtherEntityId { get; set; }
[Required]
[StringLength(128)]
public string UserId { get; set; }
[Required]
public Guid OtherEntityId { get; set; }
public virtual OtherEntity OtherEntity { get; set; }
}
public partial class UserOtherEntity : DataManager
{
public static IEnumerable<OtherEntity> GetOtherEntitiesByUserId(string userId)
{
return Connect2Context.UserOtherEntities.Where(ue => ue.UserId == userId).Select(ue => ue.OtherEntity);
}
}
public partial class ApplicationUser : IdentityUser
{
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
{
// Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
// Add custom user claims here
return userIdentity;
}
[NotMapped]
public IEnumerable<OtherEntity> OtherEntities
{
get
{
return UserOtherEntities.GetOtherEntitiesByUserId(this.Id);
}
}
}