partial void BooksForDocuments_Validate(BooksForDocument entity, EntitySetValidationResultsBuilder results)
{
if (entity.Book.Quantity <= entity.Quantity)
{
if (entity.Quantity <= 0)
{
results.AddEntityError("You can't send 0 or less books to a bookstore");
}
results.AddEntityError("Not enough books in warehouse");
}
}
partial void BooksForDocuments_Inserted(BooksForDocument entity)
{
entity.Book.Quantity -= entity.Quantity;
}