Xavier Morel 7ac3a391a1 [FIX] core: don't break import on files triggering UnicodeEncodeError
The import logging (ish) assumes that if an exception has at least 2
args the second arg is metadata added by the callee.

As it turns out, `UnicodeEncodeError` has *five* arguments, none of
which is added by us. So if encoding something fails during the
process (e.g. because the file contains a lone surrogate, which leads
to the database insert failing when psycopg2 tries to encode the query
to UTF8), then the `_log` function itself will fail, yielding a very
unhelpful error of:

   dictionary update sequence element #0 has length 1; 2 is required

(because we tried to update a dict using a string).

This issue occurs only during *field conversion* and most fields have
no need to interact with the database (so don't need to encode the
value, which is what fails), however it is a problem when the invalid
string is used as a record name to look for (e.g. an m2o).

Further improve the experience by converting the UnicodeEncodeError to
a ValueError using the stringified UEE: `_log` assumes the first
argument to the exception is an error message of some sort, but for
UnicodeError subclasses it's just the encoding involved in the
error (here `utf-8`), which doesn't really serve as an error message.

Stringifying the exception generates a complete error message which is
quite a bit more helpful.

Specific update notes:

* avoid modifying the exception in-place, doesn't seem useful
* not sure why `field_name` was added as part of the augmentation
  rather than up-front when `record` is created

Issue 2480064

closes odoo/odoo#72517

X-original-commit: 6c3c500929cd463cd3a1749f4ede8f3a8afd5748
Signed-off-by: Xavier Morel (xmo) <xmo@odoo.com>
2021-06-22 09:33:43 +00:00
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