How to Enable Migration to update my database in MVC4?

Question

I\'m working on a project using MVC4 in Visual Studio 2012 and have added a column in the table.

Now when I want to debug my project the error says to use the migrat

Answer 1

The error is saying that you have two contexts. When you first create a project using MVC 4, Visual Studio creates a context for your SimpleMembership by default (check Models/Account.cs) or do a ctrl+f for UsersContext, you can just delete this file if you are not using SimpleMembership. After removing this context, go ahead and add the following to your DefaultConnection class:

protected override void OnModelCreating(DbModelBuilder builder)
{
   Database.SetInitializer(new MigrateDatabaseToLatestVersion());
}

If you enabled migrations correctly you should also have a folder called Migrations and inside it a Configuration class, its constructor should look like this (if you want to enable automatic migrations):

public Configuration()
{
   AutomaticMigrationsEnabled = true;
}