Database.Migrate method - asp.net

Question

i want to apply migrations automatically for my app
so i used this method
Database.Migrate()
Applies any pending migrations for the context to the database. Will create the database if it does not already exist.
so as i understood when i run my application it should do as follow
1- create database if it doesn't exist
2- update database => apply migration to database
but when I run my project nothing happens
i write command manually to apply database and it's work but i don't know where is the problem
this is my code
dbContext
using Microsoft.Extensions.Configuration;
using Microsoft.EntityFrameworkCore;
using brokerTest.Entites;
namespace brokerTest.Brokers.Sotrage
{
public class StorageBroker : DbContext , IStorageBroker
{
private readonly IConfiguration configuration;
public StorageBroker(IConfiguration configuration)
{
this.configuration = configuration;
this.Database.Migrate();
}
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder){
var connectionString = this.configuration.GetConnectionString("DefaultConnection");
optionsBuilder.UseSqlServer(connectionString);
}
public DbSet<User> Users { get; set; }
}
}
startup.cs
services.AddDbContext<StorageBroker>();
services.AddScoped<IStorageBroker, StorageBroker>();
appsettingfile.json
{
"ConnectionStrings": {
"DefaultConnection": "server=(localdb)\\MSSQLLocalDB;Database=testDb"
},
Package installed
.NET 6 , Microsoft.EntityFrameworkCore.Design 5.0.8
Microsoft.EntityFrameworkCore.SqlServer 5.0.8

Answer 1

i found that class dbContext was not called at all because I didn't inject it with any controller or class
after i inject dbContext to my controller class
[ApiController]
[Route("/home")]
public class HomeController : Controller
{
private readonly IStorageBroker _storageBrodker;
public HomeController(IStorageBroker storageBroker)
{
_storageBrodker = storageBroker;
}
when i call route /home class is called then migrations apply
i thought it's called because i register it in services
but i didn't know it's called when need to resolve
and the comment for Sasan provide another way to do that from main when build iHost object
https://learn.microsoft.com/en-us/ef/core/managing-schemas/migrations/applying?tabs=dotnet-core-cli#apply-migrations-at-runtime