[FIX] account, account_sequence: psycopg2 errors class missing

Traceback when starting odoo server
ImportError: cannot import name 'errors' from 'psycopg2'

Exception management update in commit
4b430f8e30efb15f06982e4673cd73531a2119b3
would require psycopg2 version 2.8 minimum but version in
requirements is 2.7.7

closes odoo/odoo#106369

X-original-commit: b21fdf115e855d2383603e67343012bfe346cfd9
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/models/partner.py

@@ -4,7 +4,7 @@
 import time
 import logging
 
-from psycopg2 import sql, errors as sql_errors
+from psycopg2 import sql, DatabaseError
 
 from odoo import api, fields, models, _
 from odoo.osv import expression
@@ -649,7 +649,11 @@ class ResPartner(models.Model):
                     """).format(field=sql.Identifier(field))
                     self.env.cr.execute(query, {'partner_ids': tuple(self.ids), 'n': n})
                     self.invalidate_recordset([field])
-            except (sql_errors.SerializationFailure, sql_errors.LockNotAvailable):
+            except DatabaseError as e:
+                # 55P03 LockNotAvailable
+                # 40001 SerializationFailure
+                if e.pgcode not in ('55P03', '40001'):
+                    raise e
                 _logger.debug('Another transaction already locked partner rows. Cannot update partner ranks.')
 
     @api.model

addons/account/tests/test_sequence_mixin.py

@@ -280,7 +280,7 @@ class TestSequenceMixin(TestSequenceMixinCommon):
         self.assertEqual(copies[5].name, 'XMISC/2019/00004')
 
         # Can't have twice the same name
-        with self.assertRaises(psycopg2.errors.IntegrityError), mute_logger('odoo.sql_db'), self.env.cr.savepoint():
+        with self.assertRaises(psycopg2.DatabaseError), mute_logger('odoo.sql_db'), self.env.cr.savepoint():
             copies[0].name = 'XMISC/2019/00001'
 
         # Lets remove the order by date

addons/account_sequence/models/sequence_mixin.py

@@ -1,4 +1,4 @@
-from psycopg2 import errors
+from psycopg2 import DatabaseError
 
 from odoo import models
 from odoo.tools import mute_logger
@@ -36,7 +36,10 @@ class SequenceMixin(models.AbstractModel):
                     self[self._sequence_field] = sequence
                     self.flush_recordset([self._sequence_field])
                     break
-            except (errors.ExclusionViolation, errors.UniqueViolation):
-                pass
+            except DatabaseError as e:
+                # 23P01 ExclusionViolation
+                # 23505 UniqueViolation
+                if e.pgcode not in ('23P01', '23505'):
+                    raise e
         self._compute_split_sequence()
         self.flush_recordset(['sequence_prefix', 'sequence_number'])