Yes, thanks, Simone cue me about the on_define argument... I wasn't know about that shame on me...
:) Richard On Wed, Mar 15, 2017 at 1:48 PM, Anthony <[email protected]> wrote: > On Wednesday, March 15, 2017 at 12:03:52 PM UTC-4, Richard wrote: >> >> We can even use a set inside an IS_IN_DB() requires inside model >> definition something like that prevent model from being lazy : >> >> db.define_table('tablename', >> Field('fk_id_field', 'reference othertable', >> requires=IS_IN_DB(db(db.othert >> able.id > 0), 'othertable.id', '%(represent_field)s') >> ) >> ) >> >> This is sad... >> >> I confirm that >> >> some_set = db(db.tablename.fieldname > 1) >> >> put in model outside of table definition prevent the table over which the >> set point from being lazy... >> >> And use of set inside IS_IN_DB() also prevent table from being lazy >> > > The point of lazy tables is that they are not fully defined until you > *reference > *them (i.e., via db.mytable or db['mytable']). Of course, once you > reference them, they must be defined. If something like db.tablename.fieldname > > 1 would not trigger a table to be defined, what exactly would you > expect to trigger the definition? > > Anyway, the exact case you mention is covered by the on_define > <http://web2py.com/books/default/chapter/29/06/the-database-abstraction-layer#on_define> > argument. > > If you want to improve performance related to model instantiation, you > should also consider conditional models as well as moving some model > definitions to modules. > > Anthony > > -- > Resources: > - http://web2py.com > - http://web2py.com/book (Documentation) > - http://github.com/web2py/web2py (Source code) > - https://code.google.com/p/web2py/issues/list (Report Issues) > --- > You received this message because you are subscribed to the Google Groups > "web2py-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
