EF 5 Enable-Migrations : No context type was found in the assembly

Question

I have 4 projects :

Toombu.Entities : all models are there
Toombu.DataAccess: Mapping, Repository and ToombuContext
Toombu.Logique : Logic of my application         


        

Answer 1

I got this problem first: PM> add-migration first

No migrations configuration type was found in the assembly 'MyProjectName'. (In Visual Studio you can use the Enable-Migrations command from Package Manager Console to add a migrations configuration).

then i tried this:

PM> Enable-Migrations No context type was found in the assembly 'MyProjectName'.

Then the right command for me :

PM> Enable-Migrations -ProjectName MyProjectName -ContextTypeName MyProjectName.Data.Context

After that i got this error message even though Context inherits from DbContext

The type 'Context' does not inherit from DbContext. The DbMigrationsConfiguration.ContextType property must be set to a type that inherits from DbContext.

Then i Installed Microsoft.EntityFrameworkCore.Tools

ITS OK NOW but the message is funny. i already tried add migrations at first :D

Both Entity Framework Core and Entity Framework 6 are installed. The Entity Framework Core tools are running. Use 'EntityFramework6\Enable-Migrations' for Entity Framework 6. Enable-Migrations is obsolete. Use Add-Migration to start using Migrations.

Answer 2

If anyone is still facing this problem. I solved it by using the following command:

Enable-Migrations -ProjectName <YOUR_PROJECT_NAME> -ContextTypeName <YOUR_CONTEXT_NAME>

Don't forget to use the full path to your context name.

Answer 3

Change the default project and choose the startup project from dropdown:

Answer 4

I had to do a combination of two of the above comments.

Both Setting the Default Project within the Package Manager Console, and also Abhinandan comments of adding the -ContextTypeName variable to my full command. So my command was as follows..

Enable-Migrations -StartUpProjectName RapidDeploy -ContextTypeName RapidDeploy.Models.BloggingContext -Verbose

My Settings::

• ProjectName - RapidDeploy
• BloggingContext (Class Containing DbContext, file is within Models folder of Main Project)

Answer 5

How to Update table and column in mvc using entity framework code first approach

1: tool > package manager console

2: select current project where context class exist

3: Enable migration using following command PM > enable-migrations

4: Add migration folder name using following command PM > add-migration MyMigrationName

4: Now update database following command PM > update-database

Answer 6

Worked for me:

 UnInstall-Package EntityFramework 

• Restart Visual Studio

Install-Package EntityFramework

• Build project