Instead of doing a name_get on the edited value and trying to find out
an m2o to assign back (which there's pretty much no chance of given
there's no autocompletion or anything), alter the m2o record in-place
by setting the provided edited value to its _rec_name.
Ideally, both features could be supported via more advanced m2o
edition widgets which would allow selecting an existing m2o, creating
a new m2o record from scratch or (maybe) editing the existing m2o's
display_name if possible, somewhat similar to what the form view
provides.
Without these though, the only action which makes any sense is to edit
the user-visible "value" where it is found, as with more normal
fields.
bzr revid: xmo@openerp.com-20131218140917-4eo2o55yfcumzhov
Xavier Morel