am a newbie ..
encountered a small problem
any help will be appreciated
class Stock(declarative_base):
__tablename__ = 'tbl_stock'
....
....
books = relation("Book", order_by="Book.id",
backref="tbl_stock")
....
pass
class Book(declarative_base):
__tablename__ = 'tbl_books'
....
....
stock = relation('Stock', backref=backref('tbl_books',
order_by=id))
## created a stock and added 3 books to the stock
ins_stock = Stock()
ins_book_1 = Book('Book1')
ins_book_2 = Book('Book2')
ins_book_3 = Book('Book3')
ins_stock.books = [ins_book_1,ins_book_2,ins_book_3]
# saving .......
session.add(ins_stock)
flush()
# Later when i update the stock like removing book1 and adding book4
# book1 exists in the db
ins_stock.books.remove(ins_book_1)
ins_book_4 = Book('Book4')
ins_stock.books.add(ins_book_4)
flush()
in the table the row corresponding to the book1 remains there
what should i do to tell sqlalchemy to automatically remove orphan
books
i have tried giving cascade = 'a'',delete-orphan'
but errors comes
thanks and regards
[EMAIL PROTECTED]
Calicut,India
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