_exceptions.py
author Julien Cristau <julien.cristau@logilab.fr>
Mon, 09 Nov 2015 15:22:43 +0100
changeset 10869 575982c948a9
parent 10829 550c2d27339f
child 10903 da30851f9706
permissions -rw-r--r--
[dataimport] remove drop_index parameter from massive store "drop_index=False" also implied not dropping any constraints, in particular foreign keys, which meant any attempt to import entities would fail, because we only add metadata (the entities table) after the entity's insertion.
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# copyright 2003-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""Exceptions shared by different cubicweb packages."""
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__docformat__ = "restructuredtext en"
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from warnings import warn
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from six import PY3, text_type
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from logilab.common.decorators import cachedproperty
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from yams import ValidationError
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# abstract exceptions #########################################################
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class CubicWebException(Exception):
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    """base class for cubicweb server exception"""
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    msg = ""
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    def __unicode__(self):
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        if self.msg:
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            if self.args:
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                return self.msg % tuple(self.args)
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            else:
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                return self.msg
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        else:
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            return u' '.join(text_type(arg) for arg in self.args)
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    __str__ = __unicode__ if PY3 else lambda self: self.__unicode__().encode('utf-8')
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class ConfigurationError(CubicWebException):
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    """a misconfiguration error"""
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class InternalError(CubicWebException):
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    """base class for exceptions which should not occur"""
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class SecurityError(CubicWebException):
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    """base class for cubicweb server security exceptions"""
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class RepositoryError(CubicWebException):
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    """base class for repository exceptions"""
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class SourceException(CubicWebException):
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    """base class for source exceptions"""
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class CubicWebRuntimeError(CubicWebException):
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    """base class for runtime exceptions"""
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# repository exceptions #######################################################
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class ConnectionError(RepositoryError):
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    """raised when a bad connection id is given or when an attempt to establish
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    a connection failed
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    """
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class AuthenticationError(ConnectionError):
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    """raised when an attempt to establish a connection failed due to wrong
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    connection information (login / password or other authentication token)
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    """
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class BadConnectionId(ConnectionError):
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    """raised when a bad connection id is given"""
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class UnknownEid(RepositoryError):
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    """the eid is not defined in the system tables"""
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    msg = 'No entity with eid %s in the repository'
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class UniqueTogetherError(RepositoryError):
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    """raised when a unique_together constraint caused an IntegrityError"""
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    def __init__(self, session, **kwargs):
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        self.session = session
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        assert 'rtypes' in kwargs or 'cstrname' in kwargs
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        self.kwargs = kwargs
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        # fill cache while the session is open
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        self.rtypes
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    @cachedproperty
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    def rtypes(self):
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        if 'rtypes' in self.kwargs:
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            return self.kwargs['rtypes']
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        cstrname = unicode(self.kwargs['cstrname'])
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        cstr = self.session.find('CWUniqueTogetherConstraint', name=cstrname).one()
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        return sorted(rtype.name for rtype in cstr.relations)
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    @cachedproperty
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    def args(self):
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        warn('[3.18] UniqueTogetherError.args is deprecated, just use '
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             'the .rtypes accessor.',
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             DeprecationWarning)
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        # the first argument, etype, is never used and was never garanteed anyway
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        return None, self.rtypes
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class ViolatedConstraint(RepositoryError):
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    def __init__(self, cnx, cstrname):
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        self.cnx = cnx
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        self.cstrname = cstrname
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# security exceptions #########################################################
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class Unauthorized(SecurityError):
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    """raised when a user tries to perform an action without sufficient
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    credentials
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    """
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    msg = 'You are not allowed to perform this operation'
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    msg1 = 'You are not allowed to perform %s operation on %s'
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    var = None
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    def __str__(self):
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        try:
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            if self.args and len(self.args) == 2:
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                return self.msg1 % self.args
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            if self.args:
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                return ' '.join(self.args)
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            return self.msg
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        except Exception as ex:
0
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            return str(ex)
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class Forbidden(SecurityError):
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    """raised when a user tries to perform a forbidden action
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    """
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# source exceptions ###########################################################
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class EidNotInSource(SourceException):
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    """trying to access an object with a particular eid from a particular
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    source has failed
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    """
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    msg = 'No entity with eid %s in %s'
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# registry exceptions #########################################################
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# pre 3.15 bw compat
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from logilab.common.registry import RegistryException, ObjectNotFound, NoSelectableObject
0
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class UnknownProperty(RegistryException):
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    """property found in database but unknown in registry"""
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# query exception #############################################################
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class QueryError(CubicWebRuntimeError):
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    """a query try to do something it shouldn't"""
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class NotAnEntity(CubicWebRuntimeError):
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    """raised when get_entity is called for a column which doesn't contain
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    a non final entity
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    """
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class MultipleResultsError(CubicWebRuntimeError):
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    """raised when ResultSet.one() is called on a resultset with multiple rows
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    of multiple columns.
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    """
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class NoResultError(CubicWebRuntimeError):
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    """raised when no result is found but at least one is expected.
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    """
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class UndoTransactionException(QueryError):
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    """Raised when undoing a transaction could not be performed completely.
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    Note that :
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      1) the partial undo operation might be acceptable
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         depending upon the final application
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      2) the undo operation can also fail with a `ValidationError` in
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         cases where the undoing breaks integrity constraints checked
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         immediately.
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      3) It might be that neither of those exception is raised but a
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         subsequent `commit` might raise a `ValidationError` in cases
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         where the undoing breaks integrity constraints checked at
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         commit time.
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    :type txuuix: int
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    :param txuuid: Unique identifier of the partialy undone transaction
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    :type errors: list
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    :param errors: List of errors occurred during undoing
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    """
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    msg = u"The following error(s) occurred while undoing transaction #%d : %s"
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    def __init__(self, txuuid, errors):
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        super(UndoTransactionException, self).__init__(txuuid, errors)
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        self.txuuid = txuuid
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        self.errors = errors
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0
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# tools exceptions ############################################################
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class ExecutionError(Exception):
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    """server execution control error (already started, not running...)"""
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# pylint: disable=W0611
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from logilab.common.clcommands import BadCommandUsage
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