Invalid object name 'dbo.AspNetUsers' in Asp.NET MVC 5 Entity Framework

Question

If you have an existing database, and you want to include ASP.NET Identity tables to it, you can face this error. You may not know how to integrate [AspNetRoles], [AspNetUserClaims], [AspNetUsers], [AspNetUserLogins] tables into your existing database when you start. Although there are a lot of resources about this topic, this answer tries to be short and to the point. You may want to use the Database-First approach in Entity Framework together with the ASP.NET Identity feature of ASP.NET MVC. This is a very short tutorial for dummies. I am sorry if my English is poor.

Answer 1

In Visual Studio go to "Tools -> NuGet Package Manager -> Package Manager Console" and in console window (inside Visual Studio) execute "Update-Database" command

Answer 2

Here is the shortest integration of Asp.NET Identity tables to your existing database.

1) Open new project or your existing project in Visual Studio (2015 or 2013). Open your Server Explorer and open your DefaultConnection.Find your Identity tables. (In WebConfig file, localDB connectionstring should be active. And your other existing Database's connection string should not be active.) Double Click your [AspNetRoles], [AspNetUserClaims], [AspNetUsers], [AspNetUserLogins] tables. And copy all of their SQL codes.

2) Open your existing database in your SQL Server Management Studio, right click your database and click New Query past here what you copied in 1st part. You will past something like that:

CREATE TABLE [dbo].[AspNetRoles] (
[Id]   NVARCHAR (128) NOT NULL,
[Name] NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_dbo.AspNetRoles] PRIMARY KEY CLUSTERED ([Id] ASC)
);


GO
CREATE UNIQUE NONCLUSTERED INDEX [RoleNameIndex]
ON [dbo].[AspNetRoles]([Name] ASC);



CREATE TABLE [dbo].[AspNetUsers] (
[Id]                   NVARCHAR (128) NOT NULL,
[Email]                NVARCHAR (256) NULL,
[EmailConfirmed]       BIT            NOT NULL,
[PasswordHash]         NVARCHAR (MAX) NULL,
[SecurityStamp]        NVARCHAR (MAX) NULL,
[PhoneNumber]          NVARCHAR (MAX) NULL,
[PhoneNumberConfirmed] BIT            NOT NULL,
[TwoFactorEnabled]     BIT            NOT NULL,
[LockoutEndDateUtc]    DATETIME       NULL,
[LockoutEnabled]       BIT            NOT NULL,
[AccessFailedCount]    INT            NOT NULL,
[UserName]             NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_dbo.AspNetUsers] PRIMARY KEY CLUSTERED ([Id] ASC)
);


GO
CREATE UNIQUE NONCLUSTERED INDEX [UserNameIndex]
ON [dbo].[AspNetUsers]([UserName] ASC);


CREATE TABLE [dbo].[AspNetUserRoles] (
[UserId] NVARCHAR (128) NOT NULL,
[RoleId] NVARCHAR (128) NOT NULL,
CONSTRAINT [PK_dbo.AspNetUserRoles] PRIMARY KEY CLUSTERED ([UserId] ASC, [RoleId] ASC),
CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId] FOREIGN KEY ([RoleId]) REFERENCES [dbo].[AspNetRoles] ([Id]) ON DELETE CASCADE,
CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
 );


GO
CREATE NONCLUSTERED INDEX [IX_UserId]
ON [dbo].[AspNetUserRoles]([UserId] ASC);


GO
CREATE NONCLUSTERED INDEX [IX_RoleId]
ON [dbo].[AspNetUserRoles]([RoleId] ASC);



CREATE TABLE [dbo].[AspNetUserLogins] (
[LoginProvider] NVARCHAR (128) NOT NULL,
[ProviderKey]   NVARCHAR (128) NOT NULL,
[UserId]        NVARCHAR (128) NOT NULL,
CONSTRAINT [PK_dbo.AspNetUserLogins] PRIMARY KEY CLUSTERED ([LoginProvider] ASC, [ProviderKey] ASC, [UserId] ASC),
CONSTRAINT [FK_dbo.AspNetUserLogins_dbo.AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);


GO
CREATE NONCLUSTERED INDEX [IX_UserId]
ON [dbo].[AspNetUserLogins]([UserId] ASC);



CREATE TABLE [dbo].[AspNetUserClaims] (
[Id]         INT            IDENTITY (1, 1) NOT NULL,
[UserId]     NVARCHAR (128) NOT NULL,
[ClaimType]  NVARCHAR (MAX) NULL,
[ClaimValue] NVARCHAR (MAX) NULL,
CONSTRAINT [PK_dbo.AspNetUserClaims] PRIMARY KEY CLUSTERED ([Id] ASC),
CONSTRAINT [FK_dbo.AspNetUserClaims_dbo.AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);


GO
CREATE NONCLUSTERED INDEX [IX_UserId]
ON [dbo].[AspNetUserClaims]([UserId] ASC);

If you forget the lines which starting with GO, you will exactly see the error which is in Title of this question. Run this query and wait for succesfully creation of tables. Your existing database is now ready for Identity features of Asp.NET MVC 5.

3) Open WebConfig in your Visual Studio. We will change connectionstring here. Write this:

 <add name="DefaultConnection" connectionString="Data Source=YOUR_SERVER_NAME;Initial Catalog=YOUR_DATABASE_NAME;Persist Security Info=True;User ID=YOUR_USER_ID;Password=YOUR_PASSWORD.;MultipleActiveResultSets=True;Application Name=EntityFramework"  providerName="System.Data.SqlClient"/>

Instead of localDB connection string. Which is this:

 <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-....mdf;Initial Catalog=aspnet-...;Integrated Security=True" providerName="System.Data.SqlClient" />

That's all you need to do. Run your project and Register. You can see your new user data in AspNetUsers table, in your existing database.

Answer 3

I have faced same problem, Here I was forget to call EnsureCreated(). After calling this method it will create all tables required by Identity.

Startup.cs

public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider serviceProvider)
{
        ...

        // Make sure we have the database
        serviceProvider.GetService<ApplicationDbContext>().Database.EnsureCreated();
}