I'm running into a problem when enabling migrations on one of my projects.
I execute Enable-Migrations command from the Nuget Console and receive an error saying:
Exception calling "SetData" with "2" argument(s): "Type
'Microsoft.VisualStudio.TeamArchitect.ModelingProject.ModelProjectAutomationObject' in assembly
'Microsoft.VisualStudio.TeamArchitect.ModelingProject, Version=11.0.0.0, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable."
At D:\Solution\packages\EntityFramework.5.0.0\tools\EntityFramework.psm1:391 char:5
+ $domain.SetData('startUpProject', $startUpProject)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : SerializationException
Has anyone faced this problem before that can point me in the right direction.
Environment:
.NET 4.5
Entity Framework 5
Visual Studio 2012 Update 2
Found the problem!
The issue was that the startup project in my solution was a modeling project.
For some reason when enabling migrations on my project, the module looks at libraries related to the startup project.
Changed my startup project to be a test project in the solution and everything worked.
UPDATE
Make sure your startup project contains the app.config or web.config file you want to use to connect to database. This is the file that it will be used to generate migrations even if your DbContext is located on a different project. You can set the project containing your DbContext as the startup project.
it turns out when you use code first migrations you have to specify a startup project in VS referencing the project where your migrations are defined elsewhere it wont be able to load the project.
(If you are using Code First Migrations inside Visual Studio this can happen if the startUp project for your solution does not reference the project that contains your migrations. You can either change the startUp project for your solution or use the -StartUpProjectName parameter.)
Just in case others are still having issues, I had this problem because I had both Entity Framework 6 and Entity Framework Core installed. Just running the commands defaults to EF6, I believe. After I prefaced the commands with 'EntityFrameworkCore/', it worked fine. I'm not an expert on this, so don't if that is incorrect, I apologize. (Ex. 'EntityFrameworkCore/')
Try to specify content type name:
Enable-Migrations -ContextTypeName Web.Infrastructure.ContextName
If you have several projects in the solution, you have to specify which one to apply.
(dropdown "DefaultProject" in the top of console).
I was having this issue too and realized that it couldn't connect because the startup web.config didn't contain the EF configuration details. The project that did contain it (the data layer) has the configuration info needed but that config isn't used. Simply move the EF config info from the config file where EF is being used and put it in the config of your startup project. Worked a treat for me.
Related
When trying to scaffold with asp.net core this command
scaffold-dbcontext "Data Source=(local);Initial
Catalog=MyDb;Integrated Security=True;"
Microsoft.EntityFrameworkCore.sqlserver -outputdir Models
Gives this error.
scaffold-dbcontext : The term 'scaffold-dbcontext' is not recognized
as the name of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included, verify
that the path is correct and try again. At line:1 char:1
+ scaffold-dbcontext "Data Source=(local);Initial Catalog=MyDB;In ...
+ ~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (scaffold-dbcontext:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
I have tried the solution here, but it does not work for me.
Any idea what the cause/cure could be?
For me apparently it worked once I have also ran in Package Manager console :
Install-Package Microsoft.EntityFrameworkCore.Tools
Also make sure :
To have other dependencies (for example Microsoft.EntityFrameworkCore, Microsoft.EntityFrameworkCore.SqlServer, Microsoft.EntityFrameworkCore.SqlServer.Design...) referenced depending of your needs.
To select the right assembly as target for your commands in the top-right corner of the PM console (I am frequently fooled by forgetting it...)
Another problem I encountered : with the dbcontext located in a separate class library, I was encountering the following error :
Unable to find provider assembly with name
Microsoft.EntityFrameworkCore.SqlServer. Ensure the specified name is
correct and is referenced by the project.
Which I was able to fix by setting my class library as Startup project in VS (don't ask why as it seems meaningless, but it worked).
Late edit, there's something else to know : You can't run Scaffold-DbContext against a class library targetting only .Net Standard, you must also enable netcoreapp in it, or Scaffold-DbContext will complain.
To support both targets, edit the csproj to put : <TargetFrameworks>netcoreapp2.2;netstandard2.0</TargetFrameworks>
Instead of <TargetFramework> section.
After all these you'll be able to run your Scaffold-DbContext command line with proper arguments and connection string.
-- 2022 update --
I'm glad to see that post is still helpful as it receives some new upvotes, but instead of command-line scaffolding, there's a newer solution for the happy users of VS : you can rely on the retro-engineering feature of the extension EF Core Power tools.
I'm using it in all my new projects since a while and I find it much more powerful than raw command line, and it allows you to save your execution settings (which will avoid you to create a .bat with your custom command line).
Of course, it's your choice.
Had the same problem. In my case i was missing some dependencies, so make sure that you have the following one :
Microsoft.EntityFrameworkCore
Microsoft.EntityFrameworkCore.SqlServer
Microsoft.EntityFrameworkCore.Tools
Hope this would help. :)
Make sure that this is available in your project.json file "Microsoft.EntityFrameworkCore.Tools.DotNet": "1.0.0-preview3-final".
Run the command in the package manager console
that's all it will work
Make sure you run VS as Administrator and have installed the following packages:
Microsoft.EntityFrameworkCore.SqlServer
Microsoft.EntityFrameworkCore.SqlServer.Design
Microsoft.EntityFrameworkCore.Tools
Scaffold command is part of dbcontext command in EF. Below are the details for successful scaffold:
Package references required:
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.0.0"/>
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.0.0"/>
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.0.0"/>
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.0.0"/>
So our scaffold command should look like:
dotnet ef dbcontext scaffold "Server=localhost\SQLEXPRESS;Database=MyDatabase;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -o OutputDirectory
Your Server value might differ as per your Db server name. Replace MyDatabase with your Database name like master and OutputDirectory to the location you want your newly created scaffolded classes like Models folder.
Make sure you are using the right console, the "Package Manager Console". There is also a "Terminal" console which looks very similar, but doesn't work for this command. Package Manager Console can be found in View -> Other Windows (as of Visual Studio 2019, ver. 16.6.5)
I had installed Microsoft.EntityFrameworkCore.Tools from NuGet Package Manager and it was visible in the installed packages. But I kept getting this error.
Restarting Visual Studio (2019/Version 16.4.4) fixed it for me.
With VS2022, none of them worked.
But I installed EF
dotnet tool install --global dotnet-ef
and changed the code;
dotnet ef dbcontext scaffold "Server=servername;Database=dbname;Persist Security Info=True;User ID=XXX;Password=YYY;" Microsoft.EntityFrameworkCore.SqlServer -o Models
Also I had to install .Net 6.0 hosting bundle
https://dotnet.microsoft.com/en-us/download/dotnet/6.0/runtime?cid=getdotnetcore
For me this error was caused by extra spacing was added around the hyphens, which was for some reason added when copy pasting from the command from the docs. Removing the spacing fixed it.
causes error:
Scaffold - DbContext "Server=(localdb)\mssqllocaldb;Database=myDbName;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer - OutputDir Models
the fix:
Scaffold-DbContext "Server=(localdb)\mssqllocaldb;Database=myDbName;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models
The docs also say if you receive this error, try restarting Visual Studio.
https://learn.microsoft.com/en-us/ef/core/get-started/aspnetcore/existing-db
If you're using .NetCore 2.2 then the command below works like a charm for me either in Command Prompt (CMD) or on Git Bash.
Make sure that you are directly on the project folder before running the command.
For example C:\App\ProjectName:
dotnet ef dbcontext scaffold "Server=.\;Database=Databasename;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -o Model
I ran into another cause of this error recently: NuGet itself was out of date.
Updating NuGet resolved the issue.
If Devanathan's answer doesn't work for you, check to make sure NuGet itself is up to date.
If your solution has more than one project and the EF files are not in the startup project, make sure you choose the correct project here
I'm using ASP.NET Core MVC and for some reason the package manager console in visual studio 2015 or the command prompt window will not recognize any Entity Framework commands like 'Enable-Migrations' 'dnx ef database update' etc..
I never had any issues with EF migrations in any other project where iv'e been using MVC 5 with Entity Framwork 6
I also tried restarting Visual Studio like many answers recommended but that didn't work for me.
The error message I get for enabling migrations is:
PM> Enable-migrations
Enable-migrations : The term 'Enable-migrations' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path
was included, verify that the path is correct and try again.
At line:1 char:1
+ Enable-migrations
+ ~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (Enable-migrations:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
First "dnx" command won't work if you installed the Entity Framewok Core or are using a Asp.Net Core application, you need to use the .Net Core CLI commands instead, and "enable-migrations" is not part of the commands list anymore.
So to add a migration to your project you need to use the following command in the command line opened from the root of your src folder:
dotnet ef migrations add {MigrationName}
There are many other commands, find out about them more by typing the following in the command line:
dotnet ef database --help
dotnet ef dbcontext --help
dotnet ef migrations --help
This is assuming that you already installed the EF Core and EF Core Tools in your project, you should have these two references in your project.json:
Under dependencies:
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final"
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.0"
Under tools:
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final"
All the previous information is related to the Entity Framework Core under a ASP.Net Core application.
If you want to work with ASP.Net Core and the Entity Framework 6, it is also possible but that does require a few extra steps and a little plumbing to get it working seamlessly (kind of), specially if you want to make use of ASP.NEt Identity with EntityFramork 6.
Let me know if that is what you are looking for or if what I mentioned applies to your current situation and if it solves things.
I'll try my best.
Here's what I am looking at
PM> Add-Migration AddedSubdivion -StartUpProjectName Data -Verbose
Using StartUp project 'Data'.
Using NuGet project 'Registry'.
Could not load assembly 'Registry'. (If you are using Code First Migrations inside
Visual Studio this can happen if the startUp project for your solution does not
reference the project that contains your migrations. You can either change the startUp
project for your solution or use the -StartUpProjectName parameter.)
I have no idea why it's trying to reference the Registry project. Registry depends on Data, not the other way around. I am very new to this, so I'd appreciate any help.
This is embarrassing, but maybe this will help out a googler in the future.
At the top of the "Package Manager Console" my default project was set to the wrong project. Changing that to my models project fixed it.
This can also be caused by a platform mismatch between .NET Core and your project. You get the error:
Could not load assembly 'DataProject'. Ensure it is referenced by the startup project 'ProgramProject'.
even though you have specified correct project and startup project names. (Either by using the drop down boxes in VS and the Package Manager Console, or by using the -project and -startupproject parameters.)
You can fix it by switching to Any CPU instead of x86, or vice-versa (or maybe to x64, etc.), but then you will have to switch back and forth every time you need to make changes to your model/DB.
As per this answer you can fix this by changing the order of your .NET Core path entries in system environment variables. If you're getting this error, then it means that either the first .NET Core path is for x64 but you're trying to make changes to your x86 project, or possibly other way around. Move the one you're targeting above the one you're not targeting, save, and then restart Visual Studio.
You can see which one is currently being used with the command dotnet --info.
(Note that this assumes you've installed both. You may also only have one of them installed, in which case you'd need to install the other one, and then check the order of the PATH entries; if the second one you installed is the one you want, then you will definitely need to change the PATH order to make it the one used by VS, since its entry should be at the bottom.)
The problem might not be so obvious if you have Package Manager Console docked with a narrow window...hiding the default project.
Its needs a wide docking.
If all fails there's always the verbose flag (-v).
A command like dotnet ef database update -v should help clarify the problem ef is facing.
In my case, the issue stemmed from EntityFramework finding it difficult to deal with the fact that my platform target was changed from AnyCPU to x86 or x64.
System.BadImageFormatException: Could not load file or assembly 'MyProject, Culture=neutral, PublicKeyToken=null'. An attempt was made to load a program with an incorrect format.
Temporarily changing the platform target to AnyCPU worked just fine.
Make sure that you are focused on:
1- Startup Projects is UI (MVC, API, ... etc).
2- Default project in package manager console is place of (ApplicationDbContext).
I would like to add, if you are using .net6 preview, you will need to update the packages.
so you will need to use the preview versions EntityFrameworkCore.Tools and EntityFrameworkCore.SqlServer (6.0.0-rc-1.21452.10 version as of today)
I had this exact problem, and it turned out because I createdthe project under a blank solution and then added the class libraies and web app seperately it didnt have a start up project.
None of these worked for me. I temporarily unloaded the unrelated project from the solution, ran the command, and then loaded the project back in.
I've got this issue migrating an Asp.Net 5 to Asp.Net 6.
The problema was in the .csproj file.
This configuration
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
<PlatformTarget>x86</PlatformTarget>
</PropertyGroup>
I've just removed this property group and the dotnet ef worked
This can also be caused by a platform mismatch between .NET Core and
Also check this in your packages
if don't have that package Dependency Injection
Its very simple you have to install dependency injection package
The package manager window has a Default Project Property.
Setting the default project in the package manager window fixed this for me.
I also had to set the startup project to the same application in the solution explorer.
You should define 2 constructor and OnConfiguring method in context.cs. And also in your UI layer you should define connection string.
Like this:
In Context.cs :
public Context()
{
}
public Context(DbContextOptions<Context> options) : base(options)
{
}
protected override void OnConfiguring(DbContextOptionsBuilder
optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
optionsBuilder.UseSqlServer("Data Source=..");
}
}
In appsetting.json:
"ConnectionStrings": {
"SqlServer": "Data Source=....."
}
In Program.cs:
builder.Services.AddDbContext<Context>(opt =>
{
opt.UseSqlServer(builder.Configuration.GetConnectionString("SqlServer"));
});
Set the target project for the migration as the startup project and continue
PM> enable-migrations
I get an error(eManager) like this.
I have two projects in my VS solution named as below :
eManager.Domain
eManager.Web
I added reference of eManager.Domain to eManager.Web even though its popping out the same error everytime.
error here :
More than one context type was found in the assembly 'eManager.Web'.
To enable migrations for eManager.Web.Infrastructure.DepartmentDb, use Enable-Migrations -ContextTypeName eManager.Web.Infrastructure.DepartmentDb.
To enable migrations for eManager.Web.Models.UsersContext, use Enable-Migrations -ContextTypeName eManager.Web.Models.UsersContext.
Use this article and this link
The problem is easy to solve. As the error states, you can use the –ContextTypeName flag to specify your context class name. Note that you can only have migrations for one context in a project, so if you want to have migrations for both contexts you’ll need to move one to a different project. Again, my recommendation is to just remove the existing UsersContext the Internet project template creates, and take ownership of the user profile in your own context.
In the Package Manager Console you have to change the Default Projetc Drop to your Web project
and after exec enable-migrations for the context you want like that:
PM> Enable-Migrations -ContextTypeName Web.Infraestruture.DepartmentDb
But remember you already have set the web as Startproject.
I have looked around stackoverflow and search the internet but did not find a answer.
If i try to Enable-Migrations for my project i get the Exception
Error while searching for context type (specify -Verbose to see exception details).
Edit the generated Configuration class to specify the context to enable migrations for.
So my question is:
What are the requirements for my project / DbContext in order to let the Entity Framework Migrations find my DbContext WITHOUT specifying it manually ?
Thanks in advance!
You project will need a database class which derive from DbContext, and in your web.config/app.config, you will need a connection string which points to the right database which is used by your database class.
The project you run the command on will need a configuration file to have the right connection string. Even it's class library, you still need this configuration.
I have had a similar issue which was related to the wrong version of Entity Framework being referenced.
You can try executing Update-Package EntityFramework from the Package Manager Console in Visual Studio.
If that does not help then just manually reference the EF 4.3 library from your project and then re-run the Enable-Migrations -force for your project(s).
Cheers.