Add-migration multiple context

Using multiple context types One way to create multiple migration sets is to use one DbContext type per provider. Specify the context type when adding new migrations. You don't need to specify the output directory for subsequent migrations since they are created as siblings to the last one.

1. Can I have two DbContext?
2. What is ADD-migration?
3. What does add-migration initial do?
4. Can we use multiple database in Entity Framework?
5. How can add migration in ASP NET MVC?
6. How do you add migration in code first approach?
7. What is the difference between automatic migration VS code base migration?
8. How does EF migration work?
9. How do database migrations work?
10. How do I add migrations in Visual Studio 2019?
11. How do I enable migrations in Visual Studio?

Can I have two DbContext?

In code first, you can have multiple DBContext and just one database. You just have to specify the connection string in the constructor.

What is ADD-migration?

Add-Migration: Creates a new migration class as per specified name with the Up() and Down() methods. Update-Database: Executes the last migration file created by the Add-Migration command and applies changes to the database schema.

What does add-migration initial do?

Run the Add-Migration InitialCreate command in Package Manager Console. This creates a migration to create the existing schema. Comment out all code in the Up method of the newly created migration. This will allow us to 'apply' the migration to the local database without trying to recreate all the tables etc.

Can we use multiple database in Entity Framework?

Multiple DbContext was first introduced in Entity Framework 6.0. Multiple context classes may belong to a single database or two different databases.

How can add migration in ASP NET MVC?

Open the Package Manager Console. Select Tools > NuGet Package Manager > Package Manager Console. The Enable-Migration command creates the Migrations folder, which contains a script to initialize the database.

How do you add migration in code first approach?

Go to Package Manager Console and type command help migration. Type Enable-Migrations -ContextTypeName EXPShopContext. This command creates a migration folder with InitialCreate. cs and Configuration.

What is the difference between automatic migration VS code base migration?

There are those of us that think that "code migration" means "convert code from one language/platform to another" and that "automatic migration" means "do code migration automatically".

How does EF migration work?

EF Core compares the current model against a snapshot of the old model to determine the differences, and generates migration source files; the files can be tracked in your project's source control like any other source file. Once a new migration has been generated, it can be applied to a database in various ways.

How do database migrations work?

Database migration is the process of migrating data from one or more source databases to one or more target databases by using a database migration service. When a migration is finished, the dataset in the source databases resides fully, though possibly restructured, in the target databases.

How do I add migrations in Visual Studio 2019?

From the Tools menu, select NuGet Package Manager > Package Manager Console. The enable-migrations command creates a Migrations folder in the ContosoUniversity project, and it puts in that folder a Configuration. cs file that you can edit to configure Migrations.

How do I enable migrations in Visual Studio?

Go to Visual Studio "Tools -> NuGet Package Manager -> Package Manager Console". Then execute the following command. Enable-Migrations – ( We need to enable the migration, only then can we do the EF Code First Migration ). Add-Migration IntialDb (migration name) – ( Add a migration name and run the command ).