Migration: No DbContext was found in assembly

c# entity-framework model-view-controller dbcontext entity-framework-migrations
cembo picture cembo · Oct 11, 2017 · Viewed 30.8k times · Source

Using VS Community 2017. I have tried to create initial migration with error message saying:

Both Entity Framework Core and Entity Framework 6 are installed. The Entity Framework Core tools are running. Use 'EntityFramework\Add-Migration' for Entity Framework 6. No DbContext was found in assembly 'Test_Project'. Ensure that you're using the correct assembly and that the type is neither abstract nor generic.

... code in my dbcontext:

protected override void OnModelCreating(DbModelBuilder mb)
{
    base.OnModelCreating(mb);

    mb.Entity<Stuff>().ToTable("Stuff");

}

public DbSet<Stuff> Stuff{ get; set; }

Answer

Vamsi J picture Vamsi J · Jun 10, 2018

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

Related questions

Validation failed for one or more entities. See 'EntityValidationErrors' property for more details

I am having this error when seeding my database with code first approach. Validation failed for one or more entities. See 'EntityValidationErrors' property for more details. To be honest I don't know how to check the content of the validation …

Read More
MSSQL Error 'The underlying provider failed on Open'

I was using an .mdf for connecting to a database and entityClient. Now I want to change the connection string so that there will be no .mdf file. Is the following connectionString correct? <connectionStrings> <!--<add …

Read More
How to update record using Entity Framework 6?

I am trying to update record using EF6. First finding the record, if exists, update it. Here is my code:- var book = new Model.Book { BookNumber = _book.BookNumber, BookName = _book.BookName, BookTitle = _book.BookTitle, }; using (var db = new MyContextDB()) { …

Read More