Sorry Michael, there was a typo in my code, due to some wrong copy/paste or search/replace I guess, I'm afraid.
The error I reported comes up mapping to `TransmLimit` and not `SurfaceRes` (which is the one already mapped above). I edited the pastebin: http://pastebin.com/mjfgPrcB now with: 'transm_limit': relationship(TransmLimit, single_parent=True, uselist=False, primaryjoin=and_( user_stratigraphies.c.id_prov==provinces.c.id, provinces.c.id_cz==transm_limits.c.id_cz, user_stratigraphies.c.id_str==stratigraphies.c.id, stratigraphies.c.id_tec==tech_elements_classes.c.id, tech_elements_classes.c.id_tu==transm_limits.c.id_tu, ), foreign_keys=( user_stratigraphies.c.id_prov, ), ), I get the error I reported: sqlalchemy.exc.ArgumentError: Could not locate any foreign-key-equated, locally mapped column pairs for primaryjoin condition 'user_stratigraphies.id_prov = provinces.id AND provinces.id_cz = transm_limits.id_cz AND user_stratigraphies.id_str = stratigraphies.id AND stratigraphies.id_tec = tech_elements_classes.id AND tech_elements_classes.id_tu = transm_limits.id_tu' on relationship ustratatigraphy.transm_limit. For more relaxed rules on join conditions, the relationship may be marked as viewonly=True. Also there's the strange `viewonly=True` behavior that breakes `UserStratigraphy.surface_res` relationship if uncommented. Thanks for your patience. neurino On Mon, Aug 1, 2011 at 11:14 PM, Michael Bayer <mike...@zzzcomputing.com>wrote: > 'transm_limit': relationship(SurfaceRes, single_parent=True, > # uselist=False, > # primaryjoin=and_( > # user_stratigraphies.c.id_prov==provinces.c.id, > # provinces.c.id_cz==transm_limits.c.id_cz, > # user_stratigraphies.c.id_str==stratigraphies.c.id, > # stratigraphies.c.id_tec==tech_elements_classes.c.id, > # tech_elements_classes.c.id_tu==transm_limits.c.id_tu, > # ), > > this fails because you aren't joining to the table to which SurfaceRes is > mapped, "surface_res". > > > > On Aug 1, 2011, at 7:02 AM, neurino wrote: > > > I'm trying to get some relationships spanning on multiple tables (4 or > > 5). > > > > While I got the `4 tables` one working on first attempt (I was > > surpized I could...) I can't get the `5 tables` one to work while the > > code is almost the same. > > > > Moreover with the first relationship if I add adding `viewonly=True` > > initialization fails. > > > > I just need these to get (not even set) some values with convenience > > of SA attributes. > > > > I published a working example on pastebin: > > > > http://pastebin.com/RsZ6GCRq > > > > I hope someone can sort out this thing, thank you. > > > > Greetings > > neurino > > > > -- > > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > > To post to this group, send email to sqlalchemy@googlegroups.com. > > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > > > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalchemy@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
