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different exception type

See original GitHub issue

hi with postgres database connection, exception raised as psycopg2.IntegrityError but its not same as peewee.IntegrityError and not catchable. it is normal to use psycopg2.IntegrityError in except ? for example:

try:
    model.save()
except psycopg2.IntegrityError:
    raise

Issue Analytics

State:
Created 6 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

1reaction

coleifercommented, Mar 7, 2018

If you are using Postgres, you need to take care that, if you get the connection into a bad state – i.e., by an IntegrityError – you need to rollback. Auto-rollback will issue the rollback automatically, but it’s better, in my opinion, to manage the transaction yourself:

try:
    with db.atomic():
        some_obj.save()
except peewee.IntegrityError:
    # do something else?

0reactions

MR-omidcommented, Mar 6, 2018

hey, i tested again and its worked 😃 but if i set autorollback to false, problem will be appear.


Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3830, in execute_sql
    cursor.execute(sql, params or ())
psycopg2.IntegrityError: duplicate key value violates unique constraint "core_config_attribute"
DETAIL:  Key (attribute)=(test) already exists.


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/dpe/workspace/python/F.SystemAPI/models/Config.py", line 31, in save_changes
    model.save()
  File "/usr/local/lib/python3.5/dist-packages/playhouse/signals.py", line 69, in save
    ret = super(Model, self).save(*args, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 5170, in save
    pk_from_cursor = self.insert(**field_dict).execute()
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3584, in execute
    cursor = self._execute()
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 2939, in _execute
    return self.database.execute_sql(sql, params, self.require_commit)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3837, in execute_sql
    self.commit()
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3656, in __exit__
    reraise(new_type, new_type(*exc_args), traceback)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 135, in reraise
    raise value.with_traceback(tb)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3830, in execute_sql
    cursor.execute(sql, params or ())
peewee.IntegrityError: duplicate key value violates unique constraint "core_config_attribute"
DETAIL:  Key (attribute)=(test) already exists.


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3830, in execute_sql
    cursor.execute(sql, params or ())
psycopg2.InternalError: current transaction is aborted, commands ignored until end of transaction block


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/dpe/workspace/python/F.SystemAPI/dev.py", line 18, in <module>
    server.start()
  File "/home/dpe/workspace/python/F.SystemAPI/core/Server.py", line 36, in start
    Config.save_changes([{'attribute':'test','value':'omid'},{'attribute':'test2','value':'omid'},{'attribute':'test','value':'omid3'}])
  File "/home/dpe/workspace/python/F.SystemAPI/models/Config.py", line 35, in save_changes
    model = Config.get(attribute=config['attribute'])
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 4988, in get
    return sq.get()
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3220, in get
    return next(clone.execute())
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3274, in execute
    self._qr = ResultWrapper(model_class, self._execute(), query_meta)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 2939, in _execute
    return self.database.execute_sql(sql, params, self.require_commit)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3837, in execute_sql
    self.commit()
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3656, in __exit__
    reraise(new_type, new_type(*exc_args), traceback)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 135, in reraise
    raise value.with_traceback(tb)
  File "/usr/local/lib/python3.5/dist-packages/peewee.py", line 3830, in execute_sql
    cursor.execute(sql, params or ())
peewee.InternalError: current transaction is aborted, commands ignored until end of transaction block