public static Beer ToEntity(this BeerBinding binding, MainContext context, Beer beer = null)
{
var b = beer.DefaultIfNull();
b.Abv = binding.Abv;
b.Name = binding.Name;
b.ValueId = beer?.ValueId ?? binding.Name.ToValueId();
b.BeerBrandId = string.IsNullOrWhiteSpace(binding.BrandId) ? b.BeerBrandId : context.BeerBrands.GetId(binding.BrandId).Value;
b.BeerStyleId = context.BeerStyles.GetId(binding.StyleId);
return(b);
}