Asp.Net_Single_Page_App/Single_Page_Anwendung/Models/DatenEinlesen.cs

using Aps_Single_Page_Anwendung.Models;
using Aps_Single_Page_Anwendung.Repositories;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Linq;

namespace Single_Page_Anwendung.Models
{
    public class DatenEinlesen
    {
        public static void Initialize(IServiceProvider serviceProvider)
        {
            //  Holy shit Oo
            using (var futterContext = new FutterContext(serviceProvider.GetRequiredService<DbContextOptions<FutterContext>>()))
            {
                if (futterContext.Speisen.Any())
                {
                    return;
                }
                var kategorieRepository = 
                    new FileKategorieRepository(serviceProvider.GetRequiredService<IWebHostEnvironment>());

                var kategorien = kategorieRepository.GetKategorien().ToList();

                kategorien.ForEach(k =>
                {
                    k.Id = 0;
                    foreach (var speise in k.Speisen)
                    {
                        speise.Id = 0;
                        speise.KategorieId = 0;
                    }
                });

                futterContext.Kategorien.AddRange(kategorien);
                futterContext.SaveChanges();
            }
        }
    }
}