author | Aurelien Campeas <aurelien.campeas@logilab.fr> |
Wed, 11 Jun 2014 14:47:50 +0200 | |
changeset 10361 | 46d72f33c428 |
parent 10272 | 3231fd2fa7a5 |
child 10602 | 4845012cfc8e |
permissions | -rw-r--r-- |
8486 | 1 |
# copyright 2003-2012 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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parents:
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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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"""CubicWeb is a generic framework to quickly build applications which describes |
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relations between entitites. |
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""" |
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__docformat__ = "restructuredtext en" |
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# ignore the pygments UserWarnings |
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import warnings |
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import cPickle |
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import zlib |
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warnings.filterwarnings('ignore', category=UserWarning, |
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message='.*was already imported', |
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module='.*pygments') |
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import __builtin__ |
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# '_' is available in builtins to mark internationalized string but should |
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# not be used to do the actual translation |
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if not hasattr(__builtin__, '_'): |
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__builtin__._ = unicode |
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CW_SOFTWARE_ROOT = __path__[0] |
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import sys, os, logging |
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from StringIO import StringIO |
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from logilab.common.deprecation import deprecated |
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from logilab.common.logging_ext import set_log_methods |
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from yams.constraints import BASE_CONVERTERS, BASE_CHECKERS |
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# pre python 2.7.2 safety |
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logging.basicConfig() |
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from cubicweb.__pkginfo__ import version as __version__ |
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set_log_methods(sys.modules[__name__], logging.getLogger('cubicweb')) |
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# make all exceptions accessible from the package |
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from cubicweb._exceptions import * |
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from logilab.common.registry import ObjectNotFound, NoSelectableObject, RegistryNotFound |
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# convert eid to the right type, raise ValueError if it's not a valid eid |
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@deprecated('[3.17] typed_eid() was removed. replace it with int() when needed.') |
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def typed_eid(eid): |
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return int(eid) |
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#def log_thread(f, w, a): |
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# print f.f_code.co_filename, f.f_code.co_name |
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#import threading |
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#threading.settrace(log_thread) |
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class Binary(StringIO): |
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"""customize StringIO to make sure we don't use unicode""" |
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def __init__(self, buf=''): |
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assert isinstance(buf, (str, buffer, bytearray)), \ |
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"Binary objects must use raw strings, not %s" % buf.__class__ |
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StringIO.__init__(self, buf) |
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def write(self, data): |
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assert isinstance(data, (str, buffer, bytearray)), \ |
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"Binary objects must use raw strings, not %s" % data.__class__ |
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StringIO.write(self, data) |
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def to_file(self, fobj): |
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"""write a binary to disk |
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the writing is performed in a safe way for files stored on |
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Windows SMB shares |
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""" |
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pos = self.tell() |
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self.seek(0) |
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if sys.platform == 'win32': |
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while True: |
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# the 16kB chunksize comes from the shutil module |
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# in stdlib |
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chunk = self.read(16*1024) |
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if not chunk: |
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break |
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fobj.write(chunk) |
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else: |
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fobj.write(self.read()) |
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self.seek(pos) |
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@staticmethod |
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def from_file(filename): |
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"""read a file and returns its contents in a Binary |
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the reading is performed in a safe way for files stored on |
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Windows SMB shares |
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""" |
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binary = Binary() |
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with open(filename, 'rb') as fobj: |
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if sys.platform == 'win32': |
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while True: |
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# the 16kB chunksize comes from the shutil module |
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# in stdlib |
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chunk = fobj.read(16*1024) |
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if not chunk: |
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break |
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binary.write(chunk) |
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else: |
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binary.write(fobj.read()) |
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binary.seek(0) |
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return binary |
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def __eq__(self, other): |
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if not isinstance(other, Binary): |
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return False |
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return self.getvalue() == other.getvalue() |
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# Binary helpers to store/fetch python objects |
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@classmethod |
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def zpickle(cls, obj): |
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""" return a Binary containing a gzipped pickle of obj """ |
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retval = cls() |
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retval.write(zlib.compress(cPickle.dumps(obj, protocol=2))) |
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return retval |
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def unzpickle(self): |
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""" decompress and loads the stream before returning it """ |
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return cPickle.loads(zlib.decompress(self.getvalue())) |
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def check_password(eschema, value): |
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return isinstance(value, (str, Binary)) |
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BASE_CHECKERS['Password'] = check_password |
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def str_or_binary(value): |
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if isinstance(value, Binary): |
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return value |
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return str(value) |
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BASE_CONVERTERS['Password'] = str_or_binary |
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# use this dictionary to rename entity types while keeping bw compat |
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ETYPE_NAME_MAP = {} |
0 | 156 |
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# XXX cubic web cube migration map. See if it's worth keeping this mecanism |
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# to help in cube renaming |
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CW_MIGRATION_MAP = {} |
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def neg_role(role): |
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if role == 'subject': |
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return 'object' |
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return 'subject' |
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def role(obj): |
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try: |
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return obj.role |
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except AttributeError: |
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return neg_role(obj.target) |
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def target(obj): |
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try: |
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return obj.target |
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except AttributeError: |
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return neg_role(obj.role) |
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class CubicWebEventManager(object): |
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"""simple event / callback manager. |
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Typical usage to register a callback:: |
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>>> from cubicweb import CW_EVENT_MANAGER |
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>>> CW_EVENT_MANAGER.bind('after-registry-reload', mycallback) |
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Typical usage to emit an event:: |
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|
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>>> from cubicweb import CW_EVENT_MANAGER |
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>>> CW_EVENT_MANAGER.emit('after-registry-reload') |
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192 |
emit() accepts an additional context parameter that will be passed |
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to the callback if specified (and only in that case) |
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194 |
""" |
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195 |
def __init__(self): |
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self.callbacks = {} |
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197 |
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198 |
def bind(self, event, callback, *args, **kwargs): |
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199 |
self.callbacks.setdefault(event, []).append( (callback, args, kwargs) ) |
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200 |
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201 |
def emit(self, event, context=None): |
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202 |
for callback, args, kwargs in self.callbacks.get(event, ()): |
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203 |
if context is None: |
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204 |
callback(*args, **kwargs) |
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205 |
else: |
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206 |
callback(context, *args, **kwargs) |
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207 |
|
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CW_EVENT_MANAGER = CubicWebEventManager() |
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def onevent(event, *args, **kwargs): |
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211 |
"""decorator to ease event / callback binding |
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212 |
|
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213 |
>>> from cubicweb import onevent |
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214 |
>>> @onevent('before-registry-reload') |
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215 |
... def mycallback(): |
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216 |
... print 'hello' |
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... |
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>>> |
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219 |
""" |
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def _decorator(func): |
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CW_EVENT_MANAGER.bind(event, func, *args, **kwargs) |
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return func |
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return _decorator |
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from yams.schema import role_name as rname |
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def validation_error(entity, errors, substitutions=None, i18nvalues=None): |
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"""easy way to retrieve a :class:`cubicweb.ValidationError` for an entity or eid. |
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You may also have 2-tuple as error keys, :func:`yams.role_name` will be |
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called automatically for them. |
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Messages in errors **should not be translated yet**, though marked for |
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internationalization. You may give an additional substition dictionary that |
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will be used for interpolation after the translation. |
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""" |
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if substitutions is None: |
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# set empty dict else translation won't be done for backward |
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[validation api] properly use yams 0.36 validation error api and update message catalog. Follows bbe0d6985e59
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# compatibility reason (see ValidationError.translate method) |
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substitutions = {} |
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[toward py3k] rewrite dict.keys() and dict.values() (part of #2711624)
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for key in list(errors): |
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if isinstance(key, tuple): |
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errors[rname(*key)] = errors.pop(key) |
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return ValidationError(getattr(entity, 'eid', entity), errors, |
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substitutions, i18nvalues) |
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[dbapi] move ProgrammingError into cubicweb module
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# exceptions ################################################################## |
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class ProgrammingError(Exception): #DatabaseError): |
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"""Exception raised for errors that are related to the database's operation |
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and not necessarily under the control of the programmer, e.g. an unexpected |
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disconnect occurs, the data source name is not found, a transaction could |
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not be processed, a memory allocation error occurred during processing, |
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etc. |
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""" |
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