public bool EditADiet(DietEdit model)
    {
        using (var ctx = new ApplicationDbContext())
        {
            var entity =
                ctx
                .Diets
                .Single(e => e.DietId == model.DietId);
            entity.DietId         = model.DietId;
            entity.Name           = model.Name;
            entity.IsVegetarian   = model.IsVegetarian;
            entity.IsKeto         = model.IsKeto;
            entity.IsLactoseFree  = model.IsLactoseFree;
            entity.IsGlutenFree   = model.IsGlutenFree;
            entity.Description    = model.Description;
            entity.CaloriesPerDay = model.CaloriesPerDay;


            return(ctx.SaveChanges() == 1);
        }
    }