No dbcontext was found in assembly

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The Entity Framework Core tools are running. Ensure that you're using the correct assembly and that the type is neither abstract nor generic.

no dbcontext was found in assembly

In the Package Manager Console select the project where the DbContext is defined and run the command add-migration initial. For example: public class SomeContext : DbContext. Using the nuget package manager, I had installed all the EntityFrameworkCore dependencies, along with the EntityFramework 6 dependency.

Uninstalling all EF Core dependencies resolved this issue. You have to specify the project name where the DbContext is located. Learn more. Asked 2 years, 6 months ago. Active 1 month ago. Viewed 19k times. Using VS Community I have tried to create initial migration with error message saying: Both Entity Framework Core and Entity Framework 6 are installed. OnModelCreating mb ; mb. Are you using ASP.

There are some missing points you need to explain here.Net ASP. Others Own Software. General Impress Links Probleme. About Contact Customers Freelancer. No DbContext was found in assembly 'ArtikelWeb'. Ensure that you're using the correct assembly and that the type is neither abstract nor generic. In Entity Framework, the database is called dbContext and dbSet is the tables.

Net Core using Microsoft. Models ; using Microsoft. Here you put the attibut line [Key] in front of the field entry, which represents the ID column. Generic; using System. DataAnnotations; using System. Linq; using System. It is important that in each case a primary key has been adopted in the tables. With the matching T-SQL script.

Installation of. NET Core 2. Set upload of very large files in Asp. Net MVC Core 2. InvalidOperationException: An exception occurred while reading a database value for property. A database operation failed while processing the request. SqlException: Invalid object name.

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InvalidOperationException: No database provider has been configured for this dbContext. NullReferenceException: Object reference not set to an instance of an object. InvalidOperationException: The expected type was System. Boolean but the actual value was null. Freelance Project Requests info CodeDocu. Date Views Make sure you have set the Default Projectthat is present at the top label with a dropdown in your Package Manager Console.

And this project should contains your Entity Framework context. You can check this post to find where Default Project drop down located. No context type was found in the assembly when running code first migration asp. Question While running command enable-migrations in Package Manager Console, got this error: No context type was found in the assembly 'Vidly' I am using Visual Studio How to solve it?

Nigar Jafar.

no dbcontext was found in assembly

Bulk Delete. Bulk Update. Bulk Merge. Accepted Answer Make sure you have set the Default Projectthat is present at the top label with a dropdown in your Package Manager Console. Basanta Matia. Popular Answer As you are using visual studioI assume you might have used the higher version of Entity Framework 6. Entity Framework requires a context before enable-migrations.

In order to resolve the issue, please find below steps. Please find below code snippet. Add this namespace System. Entity for DbContext reference using System. Entity; namespace Vidly. View more on Stack Overflow. Prime Library. Not affiliated with Stack Overflow. SaveChanges vs BulkSaveChanges. Try for free now.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Hi I just created a new project using ASP. NET Core 1. This is my project structure:. I wish to avoid adding a referenece to DataAccess layer because all calls must go threw manager layer in order to keep things decoupled and I consider that the WebApi layer should not have any knowledge of what DataAccess technology I am using.

If there is any way to not add a reference to Microsoft. Tools": "1. Catalog but received an error that stated is not supported class in libraries. Now I want to be able to add a migration to that end I installed: in Commercify. WebApi the following assemblies:. No DbContext was found in assembly 'Commercify.

Ensure that you're using the correct assembly and that the type is neither abstract nor generic. I remembered that back when dnx was used you could add a -p command and point ef to the project where your dbContext exists so I tryed executing this. AS far as I know, the only way to do this at RTM is to run the migrations from the project that contains the context. This article outlines the process of making it work. Hopefully Microsoft will fix this soon.

Learn more. Executin a migration for a dbContext that is not in startup project Ask Question. Asked 3 years, 9 months ago. Active 3 years, 9 months ago. Viewed 5k times. This is my project structure: I wish to avoid adding a referenece to DataAccess layer because all calls must go threw manager layer in order to keep things decoupled and I consider that the WebApi layer should not have any knowledge of what DataAccess technology I am using. I have created in Commercify.

Design": "1. I remembered that back when dnx was used you could add a -p command and point ef to the project where your dbContext exists so I tryed executing this dotnet ef migrations add Init -p Commercify.

Catalog And I got the following error: Unrecognized option '-p' How can I execute a migration tools for a dbContext that is not in startup project?

Active Oldest Votes. EricksonG EricksonG 2 2 silver badges 8 8 bronze badges. Sign up or log in Sign up using Google.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub?

Sign in to your account. It sounds like you may need to add an implementation of IDbContextFactory to your assembly.

In version 2. Have you considered upgrading to version 2. Many Thanks bricelam for your fast replay. I updeted the package to v2.

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Actually, If possible to contact with you on Skype and I will share my screen with you to solve the problem faster.

IsaaasI Remove the Microsoft. Design dependency, it is not used in version 2. I already cleared the cache for NuGet and same thing. I think the structure for VS and.

NET core 2.

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I open it from Window explorer by notepad I found these statements. Can I chat with you on any chatting application to solve migration issue? I want only connect. NET Core2. Are you installing the Microsoft. You may need to update Program. It is already installedare you sure the Entity Framework 6.

Brcasue the below error is I think required Entity framwork. Ensure that you're using the correct assembly and that the type is neither abstract nor generic. I delete SqlServer ralmsdeveloper.

I will try update Program. The program. This is my error now. I think it would be ideal, you see some articles before, to help you better understand, how to use EF Core:. IsaaasI - Your project has errors. Before running migrations make sure you can build you project in VS without errors.

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Thanks a lot ralmsdeveloper. Finally, I did it. The Migration work fine now. But : 1. This is my connection string. I am wondering about my schema nameusername and password of my database where I put it?By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The Project. DAL layer contains my entity framework data context class and all my entities, but my startup project is Project. Web, so it contains my Web. I'm trying to enable migrations so I can add a new table to my EF model without wiping the existing data. However, when I run "Enable-Migrations", I get.

no dbcontext was found in assembly

I eventually found the answer in this question. Basically, in the Package Manager Console there's a "Default project" dropdown.

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You need to set this to the project that contains your EF context. Make sure you're in the project directory that contains the DbContext inheritance. Designclose all my IDE's that may be locking the files, and then it finally worked. Note that I didn't even have to run the Enable-Migration command to get this to work Also happens if for some reason your class with the connection isn't in the project.

Unable to migrate DbContext class in Entity Framework Core

So right click and 'add to project' sorts that out. Learn more. No context type was found in the assembly Ask Question. Asked 7 years, 5 months ago. Active 2 months ago. Viewed 37k times. I'm using. NET 4. My solution is split up into three projects, with the dependencies as indicated: Project. DAL The Project. If I set the startup project as Project.

DAL, the error changes to Could not load assembly '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.

Does anyone know why this error is being caused or what I can do to fix it? Cavyn VonDeylen. Active Oldest Votes. Be sure to enlarge your Package Manager Console window, or it might be off the right side of the toolbar of the window, and you'll miss it like I did. Is there any way to set this up in a configuration somewhere? DBContexts -contexttypename MyProject. MyContextName -Verbose. Jacob Jacob 2, 1 1 gold badge 27 27 silver badges 44 44 bronze badges. None of the other answers above answered my question.

And finally, I got the real errror: Your startup project 'FantasyFitness' doesn't reference Microsoft.I am surprised that no one mentioned the obvious answer to this question: Entity Framework requires a context before enable-migrations will work. The error message the OP posted suggests that no context was found.

Sure, it could be because the package manager console doesn't "see" the context--in which case the accepted answer is a possible solution another solution is one I suggest, below.

But a context must exist in the current project assembly before any other solutions will work. What does it mean to have a context? It means that there must exist a class in your project that inherits from DbContext in System. Here is an example:. If all along you had a context but the Package Manager Console just doesn't "see" it: In Visual Studio you don't have to use the -ProjectName switch. Instead, go to the Package Manager Console it's available in the View Other Windows listand look at the two dropdowns that appear at the top of the Package Manager Console dockable window.

The first dropdown is for Package Source; the second is for Default Project.

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If you dropdown the Default Project and select a project in your solution then whatever commands you issue in the Package Manager console will be executed against the selected project. EF 5 Enable-Migrations : No context type was found in the assembly asp. Question I have 4 projects : Toombu. Entities : all models are there Toombu. Logique : Logic of my application Toombu.

Web : MVC 4 application. With all others DLL. I tried to enable migration in Toombu. Web but i had this error : No context type was found in the assembly How can I enable migration?

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Bulk Delete. Bulk Update.