Dbo tutorial transaction exception
Added by Johannes Peters almost 7 years ago
Hi,
I'm trying to use the examples from https://www.webtoolkit.eu/wt/doc/tutorial/dbo.html
4. Querying objects:
dbo::ptr<User> joe = session.find<User>().where("name = ?").bind("Joe");
std::cerr << "Joe has karma: " << joe->karma << std::endl;
always throws the following exception
terminate called after throwing an instance of 'Wt::Dbo::Exception'
what(): Operation requires an active transaction
How can I fix this?
Replies (1)
RE: Dbo tutorial transaction exception - Added by Roel Standaert almost 7 years ago
As you can read in section 3, "All database operations happen within a transaction", so you need to make sure that you have a transaction object on the stack before doing anything that requires a query to the database. You can create a transaction with:
dbo::Transaction transaction(session);
Dbo enforces the use of transactions to prevent inconsistency stemming from concurrent modification of the database.
Regards,
Roel