zpracování chyb baňka

hlasů
1

Snažím se zachytit chybu generovanou baňce-sqlalchemy. Můj kód bohužel nemůže zpracovat došlo k chybě, protože debugger nejprve chytí. To se stane, když se snažím vložit záznam do databáze s pole, které to má být jedinečná, ale je duplicated.Is Existuje nějaký způsob, jak vyřešit tento problém? To je traceback.

sqlalchemy.exc.IntegrityError

IntegrityError: (IntegrityError) column username is not unique u'INSERT IGNORE  INTO user (username, password, karma) VALUES (?, ?, ?)' (u'Test', u'test', 0)
Traceback (most recent call last)

    *
      File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 889, in __call__

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] return self.wsgi_app(environ, start_response)

    *
      File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 879, in wsgi_app

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] response = self.make_response(self.handle_exception(e))

    *
      File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 876, in wsgi_app

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] rv = self.dispatch_request()

    *
      File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 695, in dispatch_request

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] return self.view_functions[rule.endpoint](**req.view_args)

    *
      File /home/josh/Projects/masterpieces_of_code/app.py, line 70, in create_user

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] db.session.commit()

    *
      File /usr/share/pyshared/sqlalchemy/orm/scoping.py, line 129, in do

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] return getattr(self.registry(), name)(*args, **kwargs)

    *
      File /usr/share/pyshared/sqlalchemy/orm/session.py, line 653, in commit

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] self.transaction.commit()

    *
      File /usr/share/pyshared/sqlalchemy/orm/session.py, line 364, in commit

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] self._prepare_impl()

    *
      File /usr/share/pyshared/sqlalchemy/orm/session.py, line 348, in _prepare_impl

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] self.session.flush()

    *
      File /usr/share/pyshared/sqlalchemy/orm/session.py, line 1346, in flush

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] self._flush(objects)

    *
      File /usr/share/pyshared/sqlalchemy/orm/session.py, line 1427, in _flush

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] flush_context.execute()

    *
      File /usr/share/pyshared/sqlalchemy/orm/unitofwork.py, line 299, in execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] rec.execute(self)

    *
      File /usr/share/pyshared/sqlalchemy/orm/unitofwork.py, line 443, in execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] uow

    *
      File /usr/share/pyshared/sqlalchemy/orm/mapper.py, line 1833, in _save_obj

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] execute(statement, params)

    *
      File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1794, in execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] object, *multiparams, **params)

    *
      File /usr/share/pyshared/sqlalchemy/interfaces.py, line 149, in execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] return execute(clauseelement, *multiparams, **params)

    *
      File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1157, in execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] params)

    *
      File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1237, in _execute_clauseelement

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] return self.__execute_context(context)

    *
      File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1268, in __execute_context

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] context.parameters[0], context=context)

    *
      File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1806, in _cursor_execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] cursor, statement, parameters, context, False)

    *
      File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flaskext/sqlalchemy.py, line 115, in cursor_execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] return execute(cursor, statement, parameters, context)

    *
      File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1367, in _cursor_execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] context)

    *
      File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1360, in _cursor_execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] context)

    *
      File /usr/share/pyshared/sqlalchemy/engine/default.py, line 288, in do_execute

       [Display the sourcecode for this frame]  [Open an interactive python shell in this frame] cursor.execute(statement, parameters)

    IntegrityError: (IntegrityError) column username is not unique u'INSERT IGNORE  INTO user (username, password, karma) VALUES (?, ?, ?)' (u'Test', u'test', 0)

This is the Copy/Paste friendly version of the traceback. You can also paste this traceback into the public lodgeit pastebin:

Traceback (most recent call last):
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 889, in __call__
    return self.wsgi_app(environ, start_response)
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 879, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 876, in wsgi_app
    rv = self.dispatch_request()
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 695, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File /home/josh/Projects/masterpieces_of_code/app.py, line 70, in create_user
    db.session.commit()
  File /usr/share/pyshared/sqlalchemy/orm/scoping.py, line 129, in do
    return getattr(self.registry(), name)(*args, **kwargs)
  File /usr/share/pyshared/sqlalchemy/orm/session.py, line 653, in commit
    self.transaction.commit()
  File /usr/share/pyshared/sqlalchemy/orm/session.py, line 364, in commit
    self._prepare_impl()
  File /usr/share/pyshared/sqlalchemy/orm/session.py, line 348, in _prepare_impl
    self.session.flush()
  File /usr/share/pyshared/sqlalchemy/orm/session.py, line 1346, in flush
    self._flush(objects)
  File /usr/share/pyshared/sqlalchemy/orm/session.py, line 1427, in _flush
    flush_context.execute()
  File /usr/share/pyshared/sqlalchemy/orm/unitofwork.py, line 299, in execute
    rec.execute(self)
  File /usr/share/pyshared/sqlalchemy/orm/unitofwork.py, line 443, in execute
    uow
  File /usr/share/pyshared/sqlalchemy/orm/mapper.py, line 1833, in _save_obj
    execute(statement, params)
  File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1794, in execute
    object, *multiparams, **params)
  File /usr/share/pyshared/sqlalchemy/interfaces.py, line 149, in execute
    return execute(clauseelement, *multiparams, **params)
  File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1157, in execute
    params)
  File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1237, in _execute_clauseelement
    return self.__execute_context(context)
  File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1268, in __execute_context
    context.parameters[0], context=context)
  File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1806, in _cursor_execute
    cursor, statement, parameters, context, False)
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flaskext/sqlalchemy.py, line 115, in cursor_execute
    return execute(cursor, statement, parameters, context)
  File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1367, in _cursor_execute
    context)
  File /usr/share/pyshared/sqlalchemy/engine/base.py, line 1360, in _cursor_execute
    context)
  File /usr/share/pyshared/sqlalchemy/engine/default.py, line 288, in do_execute
    cursor.execute(statement, parameters)
IntegrityError: (IntegrityError) column username is not unique u'INSERT IGNORE  INTO user (username, password, karma) VALUES (?, ?, ?)' (u'Test', u'test', 0)

The debugger caught an exception in your WSGI application. You can now look at the traceback which led to the error.

To switch between the interactive traceback and the plaintext one, you can click on the Traceback headline. From the text traceback you can also create a paste of it. For code execution mouse-over the frame you want to debug and click on the console icon on the right side.

You can execute arbitrary Python code in the stack frames and there are some extra helpers available for introspection:

    * dump() shows all variables in the frame
    * dump(obj) dumps all that's known about the object

Brought to you by DON'T PANIC, your friendly Werkzeug powered traceback interpreter.

Zapomněl jsem se zmínit, jak baňka reaguje, když se snažím, aby chybu zpracovat. Mám něco v souvislosti s nedefinované globální. Zde je traceback za to.

Traceback (most recent call last):
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 889, in __call__
    return self.wsgi_app(environ, start_response)
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 879, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 876, in wsgi_app
    rv = self.dispatch_request()
  File /home/josh/Projects/masterpieces_of_code/env/lib/python2.6/site-packages/flask/app.py, line 695, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File /home/josh/Projects/masterpieces_of_code/app.py, line 72, in create_user
    except(IntegrityError):
NameError: global name 'IntegrityError' is not defined
Položena 13/06/2011 v 02:13
zdroj uživatelem
V jiných jazycích...                            


1 odpovědí

hlasů
9

Musíte dát try / catch v create_userfunkcí (masterpieces_of_code / app.py) v bloku kódu, který dělá db.session.commit(), a tam zpracovat výjimku.

Aktualizace: Pokud začíná být NameErrorpro IntegrityErrorpak to znamená, že budete pravděpodobně chybět

from sqlalchemy.exc import IntegrityError

ve vašem app.py. To není zpráva z baňky, že je Python ti o neznámé jméno (z důvodu chybějícího importu), jak to interpretuje kód app.py.

Odpovězeno 13/06/2011 v 02:28
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