public static BookNavigationData BookNavigationDataEnsure(BookDataContext bookdb, BookData bookData)
{
var nd = CommonQueries.BookNavigationDataFind(bookdb, bookData.BookId);
if (nd == null)
{
nd = new BookNavigationData()
{
BookId = bookData.BookId,
};
CommonQueries.BookNavigationDataAdd(bookdb, nd, CommonQueries.ExistHandling.IfNotExists);
nd = CommonQueries.BookNavigationDataFind(bookdb, bookData.BookId);
CommonQueries.BookSaveChanges(bookdb);
}
if (nd == null)
{
App.Error($"ERROR: trying to ensure navigation data, but don't have one.");
}
return(nd);
}
