Enable Migration error - object refreence, MigrationsDomainCommand

ef-migrations entity-framework

Question

I have a MVC 4 project and recently upgraded to EF 6.0. I have only one project which contains the models and dbcontext. I was unable to enable migrations, the errors are as follows:

System.NullReferenceException: Object reference not set to an instance of an object. at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetPropertyValue[T](Project project, String propertyName) at System.Data.Entity.Migrations.MigrationsDomainCommand.GetFacade(String configurationTypeName, Boolean useContextWorkingDirectory) at System.Data.Entity.Migrations.EnableMigrationsCommand.FindContextToEnable(String contextTypeName) at System.Data.Entity.Migrations.EnableMigrationsCommand.<>c__DisplayClass2.<.ctor>b__0() at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command) Object reference not set to an instance of an object.

Googling for an answer for past 2 days, nothing seems to work. Please help me.

1
6
7/14/2017 2:20:28 AM

Fastest Entity Framework Extensions

Bulk Insert
Bulk Delete
Bulk Update
Bulk Merge

Popular Answer

I had the same issues this week when my senior developer updated the solution to EF6.

After a 'Get latest' from source control, the migrations weren't working anymore. A Visual Studio restart solved that problem. Probably the EF5 libraries were still in memory.

9
3/12/2014 10:14:37 AM

Related Questions

Enable AutoMigrations as well as other migrations in Entity Framework.

You need to pass a configuration that has the AutomaticMigrationsEnabled set to true in the constructor. Something like this should help:... Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, MyConfiguration>()); ...with MyConfiguration being something like:... public class MyConfiguration : Core.Migrations.Configuration { pu...
asp.net-mvc-3 c# ef-migrations entity-framework
asked by Mirko

DropDownList causes error: Object reference not set to an instance of an object

Check that you have in your list view...<InsertItemTemplate> .... <asp:DropDownList ID="DropDownList1" runat="server" /> .... ...In association with ...ListView1.InsertItem.FindControl("DropDownList1");
asp.net c# drop-down-menu entity-framework visual-studio-2010
asked by Aghilas Yakoub

enable-migrations error : project failed to build

Turns out I had run this earlier, on a project where there was no dbContext. This created a migrations Configuration class that said "fill in the name of the class", which was failing to build....This was causing one of my projects to silently fail to compile. ...Removing the Configuration class solved my problem.
asp.net-mvc entity-framework
asked by Doug

I get Error when i run enable-migrations in package manager console

The error message exactly states what the problem is and what needs to be done - including the command that needs to be issued. Apparently there is more than one context in your project (Web.Infrastructure.DepartmentDb and Web.Models.UsersContext) and migrations does not know for which of these migrations should be enabled. You need to point to the...
asp.net-mvc entity-framework
asked by Pawel

EF6 Beta1 - db.Database.CreateIfNotExists(); doesn't create the database anymore after enabling the migration

db.Database.CreateIfNotExists(); doesn't create the database anymore and always return true after enabling the migration. I don't see anything mentioned about it in release node as well. Is it the bug?...Note that both AutomaticMigrationsEnabled = true or false are not working after I do "Enable-Migrations" in nuget console....public void TestMetho...
entity-framework entity-framework-6
asked by Michael Sync

Error While Enabling Code-First Migrations On Mobile Services Database

I have an Azure Mobile Services project (C# backend) that I recently created and attached to an Azure SQL database. I have been trying to enable Code-First Migrations on that backing database, but it throws errors when I try to update the database....I ran through all of the conventional steps to enable migrations (Enable-Migrations, Add-Migration)...
azure-sql-database c# ef-code-first entity-framework sql
asked by Wasabi Fan

Enable-Migrations error when trying to run the command

I am trying to run the command Enable-Migrations in the NuGet console but I keep getting the following error... PM> enable-migrations System.ArgumentException: The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG)) Server stack trace: at EnvDTE.Properties.Item(Object index) at System.Runtime.Remoting.Messaging.St...
entity-framework-6 nuget
asked by user1514213

Get error while running Enable-Migrations

I got below error while running Enable-Migrations on my ASP.NET MVC5 project (Powershell v5 & Visual Studio 2015). I have tried to uninstall and re-install EntityFramework (v6.1.3) but no lucky. Does anyone know how to solve it?...Type name 'Microsoft.VisualStudio.Shell.Package' is ambiguous, it could be 'Microsoft.VisualStudio.Shell.Package, Micro...
entity-framework-6 powershell powershell-5.0 visual-studio-2015
asked by HanhDang

EF Migration object already exists error

try to Run the ...Add-Migration InitialCreate –IgnoreChanges ...command in Package Manager Console. This creates an empty migration with the current model as a snapshot. and then Run the ...Update-Database ...command in Package Manager Console. This will apply the InitialCreate migration to the database. Since the actual migration doesn’t con...
asp.net-mvc c# ef-code-first entity-framework
asked by Amr Alaa

Enable-Migrations gives Exception calling "SetData" with "2" argument(s) error

I have used Entity Framework migrations numerous times before, but I am unable to enable migrations in a new demo project I just created. I have tried the different options recommended on SO Posts but nothing seems to work. Here is how the project was created (essentially following Julia Lerman's book example):...Created a blank Visual Studio solut...
entity-framework entity-framework-6 visual-studio-2017
asked by Manish

Fastest Entity Framework Extensions

Bulk Insert
Bulk Delete
Bulk Update
Bulk Merge
View more on Stack Overflow

Prime Library

Performance

Expression Evaluator

More Projects...

Related

Licensed under: CC-BY-SA with attribution
Not affiliated with Stack Overflow
Licensed under: CC-BY-SA with attribution
Not affiliated with Stack Overflow