I have made some changes to the code in trunk:
1) Since tonight I attended a presentation about how SQLAlchemy can do
on delete cascade in SQLite even if SQLite does not support it, I
implemented this feature in web2py too. There is nothing you have to
do it now there by default. For example:
db=DAL('sqlite://test.db')
db.define_table('a',Field('name'))
db.define_table('b',Field('a',db.a,ondelete='CASCADE'),Field('name'))
db.a.insert(name='xxx1')
db.a.insert(name='xxx2')
db.a.insert(name='xxx3')
db.a.insert(name='xxx4')
db.b.insert(a=2,name='yyy1') #(1)
db.b.insert(a=2,name='yyy2') #(1)
db.b.insert(a=3,name='yyy3')
db(db.a.id==2).delete()
for row in db(db.b.a==2).select(): print row # prints nothing as it
should
Notice ondelete='CASCADE' is default.
2) you can now do:
row = db(db.mytable.id>0).select().first()
row = db(db.mytable.id>0).select().last()
and row is None if no records are selected.
3) I fixed the problem with the memory leak reported by zahariash
4) I refactored some code in main.py, compileapp.py and globals.py.
This should make the code cleaner. Hopefully I did not break it.
Please give it a try.
Massimo
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