EntityFrameworkCore: How to initialize a Database and seed it the first time user uses an application - entity-framework-core

Question

I have build a project using Microsoft Visual Studio 2015 and EntityFrameworkCore.
I have seed manually a couple of dummy data and I was developing my solution. Now, I want to deploy the in the server, but I get the problem that by starting the application the first time, it crash since it does not find a data base and data.
I have googled and I find the solution for Visual Studio 2013 and previous using the CreateDatabaseIfNotExists class that need the package: System.Data.Entity
(http://www.entityframeworktutorial.net/code-first/database-initialization-strategy-in-code-first.aspx), however, such classes and packages do not exist in EntityFrameworkCore.
How does I create and populate a database with at least one row if user is using my application by the first time in EntityFrameworkCore?
or which is the equivalent to System.Data.Entity in Entity Framework Core?

Answer 1

Rowan Miller says that ApplyMigrations is enough to create database (if not exist) and apply all (nesessary) migrations.
Create method like this:
public void CreateDbAndSampleData(IServiceProvider applicationServices)
{
using (var serviceScope = applicationServices.GetRequiredService<IServiceScopeFactory>().CreateScope())
{
using (var db = serviceProvider.GetService<ApplicationDbContext>())
{
// This will [try to] create database
// and apply all necessary migrations
db.Database.AsRelational().ApplyMigrations();
// then you can check for existing data and modify something
var admin = db.Users.Where(x => x.Name == "Superadmin").FirstOrDefault();
if (admin == null)
{
db.Users.Add(new User {...});
db.SaveChanges();
}
}
}
}
And call it from your Startup.cs, at end of Configure method:
CreateDbAndSampleData(app.ApplicationServices);
This code will run on every app startup, so you need to be accurate and do not overwrite any non-critical data changes (like changing Users's comment etc)
You can use MusicStore app as a sample: Startup.cs and SampleData.cs