Question

I have an odd problem.
There are two databases. One has all products in it for an online shop. The other one has the online-shop software on it and only the active products.

I want to take the values from db1, change some values in python and insert into db2.

db1.execute("SELECT * FROM table1")
for product in db1.fetchall():
    # ...
    db2.execute("INSERT INTO table2 ...")
    print "Check: " + str(db2.countrow)

So I can get the values via select, even selecting from db2 is no problem. My check always gives me 1 BUT there are no new rows in table2. The autoincrement value grows but the there is no data.
And I dont even get an error like “couldnt insert”
So does anybody has an idea what could be wrong? (if i do an insert manually via phpmyadmin it works… and if i just take the sql from my script and do it manually the sql-statements work aswell)

EDIT: Found the answer here How do I check if an insert was successful with MySQLdb in Python?

Is there a way to make these executes without committing everytime?
I have a wrapper around the mysqldb and it works perfectly for me, changing the behaviour with commit I need to make some big changes.

EDIT2: ok i found out that db1 is MyISAM (which would work without commiting) and db2 is InnoDB (which actually seems only to work with commiting) I guess I have to change db2 to MyISAM aswell.

Answer 1

Try adding db2.commit() after the inserts if you’re using InnoDB.

Starting with 1.2.0, MySQLdb disables autocommit by default, as
required by the DB-API standard (PEP-249). If you are using InnoDB
tables or some other type of transactional table type, you’ll need to
do connection.commit() before closing the connection, or else none of
your changes will be written to the database.

http://mysql-python.sourceforge.net/FAQ.html#my-data-disappeared-or-won-t-go-away