tiku-backend.net/Tiku.Infrastructure/DependencyInjection.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Npgsql;
using Tiku.Infrastructure.Persistence;

namespace Tiku.Infrastructure;

public static class DependencyInjection
{
    public static IServiceCollection AddInfrastructure(
        this IServiceCollection services,
        string connectionString)
    {
        ArgumentException.ThrowIfNullOrWhiteSpace(connectionString);

        services.AddSingleton(_ => NpgsqlDataSource.Create(connectionString));
        services.AddDbContextPool<TikuDbContext>((serviceProvider, options) =>
        {
            var dataSource = serviceProvider.GetRequiredService<NpgsqlDataSource>();
            options.UseNpgsql(dataSource, npgsql =>
                npgsql.MigrationsAssembly(typeof(TikuDbContext).Assembly.FullName));
        });

        return services;
    }
}