_exceptions.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Tue, 26 Jan 2010 13:38:02 +0100
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"""Exceptions shared by different cubicweb packages.
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:organization: Logilab
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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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 __str__(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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            return self.msg
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        return ' '.join(unicode(arg) for arg in self.args)
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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 occurs"""
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class SecurityError(CubicWebException):
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    """base class for cubicweb server security exception"""
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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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class AuthenticationError(ConnectionError):
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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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class BadConnectionId(ConnectionError):
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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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BadSessionId = BadConnectionId # XXX bw compat for pyro connections
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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 ETypeNotSupportedBySources(RepositoryError, InternalError):
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    """no source support an entity type"""
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    msg = 'No source supports %r entity\'s type'
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class MultiSourcesError(RepositoryError, InternalError):
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    """usually due to bad multisources configuration or rql query"""
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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, ex:
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            return str(ex)
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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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class RegistryException(CubicWebException):
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    """raised when an unregistered view is called"""
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class RegistryNotFound(RegistryException):
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    """raised when an unknown registry is requested
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    this is usually a programming/typo error...
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    """
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class ObjectNotFound(RegistryException):
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    """raised when an unregistered object is requested
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    this may be a programming/typo or a misconfiguration error
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    """
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class NoSelectableObject(RegistryException):
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    """some views with the given vid have been found but no
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    one is applicable to the result set
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    """
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class UnknownProperty(RegistryException):
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    """property found in database but unknown in registry"""
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class RegistryOutOfDate(RegistryException):
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    """raised when a source file modification is detected"""
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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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# 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-msg=W0611
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from logilab.common.clcommands import BadCommandUsage