I should also mention that I have been looking at this post, but can't see what I'm doing wrong..
https://groups.google.com/forum/?pli=1#!newtopic/web2py/web2py/PpouIgeIwX8 On Thursday, April 23, 2020 at 9:41:23 AM UTC-5, Jim S wrote: > > Given the following: > > from pydal import DAL > from pydal.objects import Field, FieldMethod, FieldVirtual > from qlf import util > ccfg = util.Config() > > db = DAL(ccfg.connect_db.dal_string, migrate=False, pool_size=5) > db.define_table('workorder', > Field('parent_workorder', 'reference workorder'), > Field('product'), > Field('quantity', 'decimal(11,2)')) > > db.workorder.children = Field.Virtual(lambda row: > db(db.workorder.parent_workorder > == row.id).select()) > > wo = db.workorder(248222) > print(wo.children) > > > ...I get this when I run the code: > > Traceback (most recent call last): > File > "/home/jim/dev/miscellaneous/projects/scratch/virtual_fields_test.py", > line 15, in <module> > print(wo.children) > File "/home/jim/.local/lib/python2.7/site-packages/pydal/objects.py", > line 167, in __getattr__ > raise AttributeError > AttributeError > > What I'm trying to do is get a list of all child workorders for a specific > workorder. > > I've also tried using Field.Method and calling as a function, but get an > attribute error as well. > > Anyone have experience with Virtual Fields? I haven't used them in or out > of web2py yet but am interested. Basically, I'm trying to reproduce the > 'backref' behavior from SQLAlchemy. > > Thanks for any help > > -Jim > > -- 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 web2py+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/web2py/b7786f8b-6e7e-427f-91e2-e2dece7ed63a%40googlegroups.com.
