# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""a class implementing basic actions used in migration scripts.
The following schema actions are supported for now:
* add/drop/rename attribute
* add/drop entity/relation type
* rename entity type
The following data actions are supported for now:
* add an entity
* execute raw RQL queries
"""
from __future__ import with_statement
__docformat__ = "restructuredtext en"
import sys
import os
import tarfile
import tempfile
import shutil
import os.path as osp
from datetime import datetime
from glob import glob
from copy import copy
from warnings import warn
from logilab.common.deprecation import deprecated
from logilab.common.decorators import cached, clear_cache
from logilab.common.testlib import mock_object
from yams.constraints import SizeConstraint
from yams.schema2sql import eschema2sql, rschema2sql
from cubicweb import AuthenticationError
from cubicweb.schema import (ETYPE_NAME_MAP, META_RTYPES, VIRTUAL_RTYPES,
PURE_VIRTUAL_RTYPES,
CubicWebRelationSchema, order_eschemas)
from cubicweb.dbapi import get_repository, repo_connect
from cubicweb.migration import MigrationHelper, yes
from cubicweb.server.session import hooks_control
try:
from cubicweb.server import SOURCE_TYPES, schemaserial as ss
from cubicweb.server.utils import manager_userpasswd, ask_source_config
from cubicweb.server.sqlutils import sqlexec, SQL_PREFIX
except ImportError: # LAX
pass
class ServerMigrationHelper(MigrationHelper):
"""specific migration helper for server side migration scripts,
providind actions related to schema/data migration
"""
def __init__(self, config, schema, interactive=True,
repo=None, cnx=None, verbosity=1, connect=True):
MigrationHelper.__init__(self, config, interactive, verbosity)
if not interactive:
assert cnx
assert repo
if cnx is not None:
assert repo
self._cnx = cnx
self.repo = repo
elif connect:
self.repo_connect()
# no config on shell to a remote instance
if config is not None and (cnx or connect):
self.session.data['rebuild-infered'] = False
self.repo.hm.call_hooks('server_maintenance', repo=self.repo)
if not schema and not getattr(config, 'quick_start', False):
schema = config.load_schema(expand_cubes=True)
self.fs_schema = schema
self._synchronized = set()
# overriden from base MigrationHelper ######################################
@cached
def repo_connect(self):
self.repo = get_repository(method='inmemory', config=self.config)
return self.repo
def cube_upgraded(self, cube, version):
self.cmd_set_property('system.version.%s' % cube.lower(),
unicode(version))
self.commit()
def shutdown(self):
if self.repo is not None:
self.repo.shutdown()
def migrate(self, vcconf, toupgrade, options):
if not options.fs_only:
if options.backup_db is None:
self.backup_database()
elif options.backup_db:
self.backup_database(askconfirm=False)
# disable notification during migration
with hooks_control(self.session, self.session.HOOKS_ALLOW_ALL, 'notification'):
super(ServerMigrationHelper, self).migrate(vcconf, toupgrade, options)
def cmd_process_script(self, migrscript, funcname=None, *args, **kwargs):
"""execute a migration script
in interactive mode, display the migration script path, ask for
confirmation and execute it if confirmed
"""
try:
if migrscript.endswith('.sql'):
if self.execscript_confirm(migrscript):
sqlexec(open(migrscript).read(), self.session.system_sql)
elif migrscript.endswith('.py') or migrscript.endswith('.txt'):
return super(ServerMigrationHelper, self).cmd_process_script(
migrscript, funcname, *args, **kwargs)
else:
print >> sys.stderr
print >> sys.stderr, ('-> ignoring %s, only .py .sql and .txt scripts are considered' %
migrscript)
print >> sys.stderr
self.commit()
except:
self.rollback()
raise
# server specific migration methods ########################################
def backup_database(self, backupfile=None, askconfirm=True):
config = self.config
repo = self.repo_connect()
# paths
timestamp = datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
instbkdir = osp.join(config.appdatahome, 'backup')
if not osp.exists(instbkdir):
os.makedirs(instbkdir)
backupfile = backupfile or osp.join(instbkdir, '%s-%s.tar.gz'
% (config.appid, timestamp))
# check backup has to be done
if osp.exists(backupfile) and not \
self.confirm('Backup file %s exists, overwrite it?' % backupfile):
print '-> no backup done.'
return
elif askconfirm and not self.confirm('Backup %s database?' % config.appid):
print '-> no backup done.'
return
open(backupfile,'w').close() # kinda lock
os.chmod(backupfile, 0600)
# backup
tmpdir = tempfile.mkdtemp(dir=instbkdir)
try:
for source in repo.sources:
try:
source.backup(osp.join(tmpdir, source.uri), self.confirm)
except Exception, ex:
print '-> error trying to backup %s [%s]' % (source.uri, ex)
if not self.confirm('Continue anyway?', default='n'):
raise SystemExit(1)
else:
break
else:
bkup = tarfile.open(backupfile, 'w|gz')
for filename in os.listdir(tmpdir):
bkup.add(osp.join(tmpdir, filename), filename)
bkup.close()
# call hooks
repo.hm.call_hooks('server_backup', repo=repo, timestamp=timestamp)
# done
print '-> backup file', backupfile
finally:
shutil.rmtree(tmpdir)
def restore_database(self, backupfile, drop=True, systemonly=True,
askconfirm=True):
# check
if not osp.exists(backupfile):
raise Exception("Backup file %s doesn't exist" % backupfile)
if askconfirm and not self.confirm('Restore %s database from %s ?'
% (self.config.appid, backupfile)):
return
# unpack backup
tmpdir = tempfile.mkdtemp()
try:
bkup = tarfile.open(backupfile, 'r|gz')
except tarfile.ReadError:
# assume restoring old backup
shutil.copy(backupfile, osp.join(tmpdir, 'system'))
else:
for name in bkup.getnames():
if name[0] in '/.':
raise Exception('Security check failed, path starts with "/" or "."')
bkup.close() # XXX seek error if not close+open !?!
bkup = tarfile.open(backupfile, 'r|gz')
bkup.extractall(path=tmpdir)
bkup.close()
self.config.open_connections_pools = False
repo = self.repo_connect()
for source in repo.sources:
if systemonly and source.uri != 'system':
continue
try:
source.restore(osp.join(tmpdir, source.uri), self.confirm, drop)
except Exception, exc:
print '-> error trying to restore %s [%s]' % (source.uri, exc)
if not self.confirm('Continue anyway?', default='n'):
raise SystemExit(1)
shutil.rmtree(tmpdir)
# call hooks
repo.open_connections_pools()
repo.hm.call_hooks('server_restore', repo=repo, timestamp=backupfile)
print '-> database restored.'
@property
def cnx(self):
"""lazy connection"""
try:
return self._cnx
except AttributeError:
sourcescfg = self.repo.config.sources()
try:
login = sourcescfg['admin']['login']
pwd = sourcescfg['admin']['password']
except KeyError:
login, pwd = manager_userpasswd()
while True:
try:
self._cnx = repo_connect(self.repo, login, password=pwd)
if not 'managers' in self._cnx.user(self.session).groups:
print 'migration need an account in the managers group'
else:
break
except AuthenticationError:
print 'wrong user/password'
except (KeyboardInterrupt, EOFError):
print 'aborting...'
sys.exit(0)
try:
login, pwd = manager_userpasswd()
except (KeyboardInterrupt, EOFError):
print 'aborting...'
sys.exit(0)
self.session.keep_pool_mode('transaction')
self.session.data['rebuild-infered'] = False
return self._cnx
@property
def session(self):
if self.config is not None:
session = self.repo._get_session(self.cnx.sessionid)
if session.pool is None:
session.set_read_security(False)
session.set_write_security(False)
session.set_pool()
return session
# no access to session on remote instance
return None
def commit(self):
if hasattr(self, '_cnx'):
self._cnx.commit()
if self.session:
self.session.set_pool()
def rollback(self):
if hasattr(self, '_cnx'):
self._cnx.rollback()
if self.session:
self.session.set_pool()
def rqlexecall(self, rqliter, ask_confirm=True):
for rql, kwargs in rqliter:
self.rqlexec(rql, kwargs, ask_confirm=ask_confirm)
@cached
def _create_context(self):
"""return a dictionary to use as migration script execution context"""
context = super(ServerMigrationHelper, self)._create_context()
context.update({'commit': self.checkpoint,
'rollback': self.rollback,
'checkpoint': deprecated('[3.6] use commit')(self.checkpoint),
'sql': self.sqlexec,
'rql': self.rqlexec,
'rqliter': self.rqliter,
'schema': self.repo.get_schema(),
'cnx': self.cnx,
'fsschema': self.fs_schema,
'session' : self.session,
'repo' : self.repo,
'synchronize_schema': deprecated()(self.cmd_sync_schema_props_perms), # 3.4
'synchronize_eschema': deprecated()(self.cmd_sync_schema_props_perms), # 3.4
'synchronize_rschema': deprecated()(self.cmd_sync_schema_props_perms), # 3.4
})
return context
@cached
def group_mapping(self):
"""cached group mapping"""
return ss.group_mapping(self._cw)
@cached
def cstrtype_mapping(self):
"""cached constraint types mapping"""
return ss.cstrtype_mapping(self._cw)
def exec_event_script(self, event, cubepath=None, funcname=None,
*args, **kwargs):
if cubepath:
apc = osp.join(cubepath, 'migration', '%s.py' % event)
else:
apc = osp.join(self.config.migration_scripts_dir(), '%s.py' % event)
if osp.exists(apc):
if self.config.free_wheel:
self.cmd_deactivate_verification_hooks()
self.info('executing %s', apc)
confirm = self.confirm
execscript_confirm = self.execscript_confirm
self.confirm = yes
self.execscript_confirm = yes
try:
return self.cmd_process_script(apc, funcname, *args, **kwargs)
finally:
self.confirm = confirm
self.execscript_confirm = execscript_confirm
if self.config.free_wheel:
self.cmd_reactivate_verification_hooks()
def install_custom_sql_scripts(self, directory, driver):
for fpath in glob(osp.join(directory, '*.sql.%s' % driver)):
newname = osp.basename(fpath).replace('.sql.%s' % driver,
'.%s.sql' % driver)
warn('[3.5.6] rename %s into %s' % (fpath, newname),
DeprecationWarning)
print '-> installing', fpath
sqlexec(open(fpath).read(), self.session.system_sql, False,
delimiter=';;')
for fpath in glob(osp.join(directory, '*.%s.sql' % driver)):
print '-> installing', fpath
sqlexec(open(fpath).read(), self.session.system_sql, False,
delimiter=';;')
# schema synchronization internals ########################################
def _synchronize_permissions(self, erschema, teid):
"""permission synchronization for an entity or relation type"""
assert teid, erschema
if 'update' in erschema.ACTIONS or erschema.final:
# entity type
exprtype = u'ERQLExpression'
else:
# relation type
exprtype = u'RRQLExpression'
gm = self.group_mapping()
confirm = self.verbosity >= 2
# * remove possibly deprecated permission (eg in the persistent schema
# but not in the new schema)
# * synchronize existing expressions
# * add new groups/expressions
for action in erschema.ACTIONS:
perm = '%s_permission' % action
# handle groups
newgroups = list(erschema.get_groups(action))
for geid, gname in self.rqlexec('Any G, GN WHERE T %s G, G name GN, '
'T eid %%(x)s' % perm, {'x': teid},
ask_confirm=False):
if not gname in newgroups:
if not confirm or self.confirm('Remove %s permission of %s to %s?'
% (action, erschema, gname)):
self.rqlexec('DELETE T %s G WHERE G eid %%(x)s, T eid %s'
% (perm, teid),
{'x': geid}, ask_confirm=False)
else:
newgroups.remove(gname)
for gname in newgroups:
if not confirm or self.confirm('Grant %s permission of %s to %s?'
% (action, erschema, gname)):
self.rqlexec('SET T %s G WHERE G eid %%(x)s, T eid %s'
% (perm, teid),
{'x': gm[gname]}, ask_confirm=False)
# handle rql expressions
newexprs = dict((expr.expression, expr) for expr in erschema.get_rqlexprs(action))
for expreid, expression in self.rqlexec('Any E, EX WHERE T %s E, E expression EX, '
'T eid %s' % (perm, teid),
ask_confirm=False):
if not expression in newexprs:
if not confirm or self.confirm('Remove %s expression for %s permission of %s?'
% (expression, action, erschema)):
# deleting the relation will delete the expression entity
self.rqlexec('DELETE T %s E WHERE E eid %%(x)s, T eid %s'
% (perm, teid),
{'x': expreid}, ask_confirm=False)
else:
newexprs.pop(expression)
for expression in newexprs.values():
expr = expression.expression
if not confirm or self.confirm('Add %s expression for %s permission of %s?'
% (expr, action, erschema)):
self.rqlexec('INSERT RQLExpression X: X exprtype %%(exprtype)s, '
'X expression %%(expr)s, X mainvars %%(vars)s, T %s X '
'WHERE T eid %%(x)s' % perm,
{'expr': expr, 'exprtype': exprtype,
'vars': expression.mainvars, 'x': teid},
ask_confirm=False)
def _synchronize_rschema(self, rtype, syncrdefs=True,
syncperms=True, syncprops=True):
"""synchronize properties of the persistent relation schema against its
current definition:
* description
* symmetric, meta
* inlined
* relation definitions if `syncrdefs`
* permissions if `syncperms`
physical schema changes should be handled by repository's schema hooks
"""
rtype = str(rtype)
if rtype in self._synchronized:
return
self._synchronized.add(rtype)
rschema = self.fs_schema.rschema(rtype)
reporschema = self.repo.schema.rschema(rtype)
if syncprops:
assert reporschema.eid, reporschema
self.rqlexecall(ss.updaterschema2rql(rschema, reporschema.eid),
ask_confirm=self.verbosity>=2)
if syncrdefs:
for subj, obj in rschema.rdefs:
if (subj, obj) not in reporschema.rdefs:
continue
if rschema in VIRTUAL_RTYPES:
continue
self._synchronize_rdef_schema(subj, rschema, obj,
syncprops=syncprops,
syncperms=syncperms)
def _synchronize_eschema(self, etype, syncrdefs=True,
syncperms=True, syncprops=True):
"""synchronize properties of the persistent entity schema against
its current definition:
* description
* internationalizable, fulltextindexed, indexed, meta
* relations from/to this entity
* permissions if `syncperms`
"""
etype = str(etype)
if etype in self._synchronized:
return
self._synchronized.add(etype)
repoeschema = self.repo.schema.eschema(etype)
try:
eschema = self.fs_schema.eschema(etype)
except KeyError:
return # XXX somewhat unexpected, no?...
if syncprops:
repospschema = repoeschema.specializes()
espschema = eschema.specializes()
if repospschema and not espschema:
self.rqlexec('DELETE X specializes Y WHERE X is CWEType, X name %(x)s',
{'x': str(repoeschema)}, ask_confirm=False)
elif not repospschema and espschema:
self.rqlexec('SET X specializes Y WHERE X is CWEType, X name %(x)s, '
'Y is CWEType, Y name %(y)s',
{'x': str(repoeschema), 'y': str(espschema)},
ask_confirm=False)
self.rqlexecall(ss.updateeschema2rql(eschema, repoeschema.eid),
ask_confirm=self.verbosity >= 2)
if syncperms:
self._synchronize_permissions(eschema, repoeschema.eid)
if syncrdefs:
for rschema, targettypes, role in eschema.relation_definitions(True):
if rschema in VIRTUAL_RTYPES:
continue
if role == 'subject':
if not rschema in repoeschema.subject_relations():
continue
subjtypes, objtypes = [etype], targettypes
else: # role == 'object'
if not rschema in repoeschema.object_relations():
continue
subjtypes, objtypes = targettypes, [etype]
self._synchronize_rschema(rschema, syncrdefs=False,
syncprops=syncprops, syncperms=syncperms)
reporschema = self.repo.schema.rschema(rschema)
for subj in subjtypes:
for obj in objtypes:
if (subj, obj) not in reporschema.rdefs:
continue
self._synchronize_rdef_schema(subj, rschema, obj,
syncprops=syncprops, syncperms=syncperms)
def _synchronize_rdef_schema(self, subjtype, rtype, objtype,
syncperms=True, syncprops=True):
"""synchronize properties of the persistent relation definition schema
against its current definition:
* order and other properties
* constraints
"""
subjtype, objtype = str(subjtype), str(objtype)
rschema = self.fs_schema.rschema(rtype)
reporschema = self.repo.schema.rschema(rschema)
if (subjtype, rschema, objtype) in self._synchronized:
return
self._synchronized.add((subjtype, rschema, objtype))
if rschema.symmetric:
self._synchronized.add((objtype, rschema, subjtype))
rdef = rschema.rdef(subjtype, objtype)
if rdef.infered:
return # don't try to synchronize infered relation defs
repordef = reporschema.rdef(subjtype, objtype)
confirm = self.verbosity >= 2
if syncprops:
# properties
self.rqlexecall(ss.updaterdef2rql(rdef, repordef.eid),
ask_confirm=confirm)
# constraints
newconstraints = list(rdef.constraints)
# 1. remove old constraints and update constraints of the same type
# NOTE: don't use rschema.constraint_by_type because it may be
# out of sync with newconstraints when multiple
# constraints of the same type are used
for cstr in repordef.constraints:
for newcstr in newconstraints:
if newcstr.type() == cstr.type():
break
else:
newcstr = None
if newcstr is None:
self.rqlexec('DELETE X constrained_by C WHERE C eid %(x)s',
{'x': cstr.eid}, ask_confirm=confirm)
else:
newconstraints.remove(newcstr)
value = unicode(newcstr.serialize())
if value != unicode(cstr.serialize()):
self.rqlexec('SET X value %(v)s WHERE X eid %(x)s',
{'x': cstr.eid, 'v': value},
ask_confirm=confirm)
# 2. add new constraints
cstrtype_map = self.cstrtype_mapping()
self.rqlexecall(ss.constraints2rql(cstrtype_map, newconstraints,
repordef.eid),
ask_confirm=confirm)
if syncperms and not rschema in VIRTUAL_RTYPES:
self._synchronize_permissions(rdef, repordef.eid)
# base actions ############################################################
def checkpoint(self, ask_confirm=True):
"""checkpoint action"""
if not ask_confirm or self.confirm('Commit now ?', shell=False):
self.commit()
def cmd_add_cube(self, cube, update_database=True):
self.cmd_add_cubes( (cube,), update_database)
def cmd_add_cubes(self, cubes, update_database=True):
"""update_database is telling if the database schema should be updated
or if only the relevant eproperty should be inserted (for the case where
a cube has been extracted from an existing instance, so the
cube schema is already in there)
"""
newcubes = super(ServerMigrationHelper, self).cmd_add_cubes(cubes)
if not newcubes:
return
for cube in newcubes:
self.cmd_set_property('system.version.'+cube,
self.config.cube_version(cube))
if cube in SOURCE_TYPES:
# don't use config.sources() in case some sources have been
# disabled for migration
sourcescfg = self.config.read_sources_file()
sourcescfg[cube] = ask_source_config(cube)
self.config.write_sources_file(sourcescfg)
clear_cache(self.config, 'read_sources_file')
# ensure added cube is in config cubes
# XXX worth restoring on error?
if not cube in self.config._cubes:
self.config._cubes += (cube,)
if not update_database:
self.commit()
return
newcubes_schema = self.config.load_schema(construction_mode='non-strict')
# XXX we have to replace fs_schema, used in cmd_add_relation_type
# etc. and fsschema of migration script contexts
self.fs_schema = self._create_context()['fsschema'] = newcubes_schema
new = set()
# execute pre-create files
driver = self.repo.system_source.dbdriver
for pack in reversed(newcubes):
cubedir = self.config.cube_dir(pack)
self.install_custom_sql_scripts(osp.join(cubedir, 'schema'), driver)
self.exec_event_script('precreate', cubedir)
# add new entity and relation types
for rschema in newcubes_schema.relations():
if not rschema in self.repo.schema:
self.cmd_add_relation_type(rschema.type)
new.add(rschema.type)
toadd = [eschema for eschema in newcubes_schema.entities()
if not eschema in self.repo.schema]
for eschema in order_eschemas(toadd):
self.cmd_add_entity_type(eschema.type)
new.add(eschema.type)
# check if attributes has been added to existing entities
for rschema in newcubes_schema.relations():
existingschema = self.repo.schema.rschema(rschema.type)
for (fromtype, totype) in rschema.rdefs:
if (fromtype, totype) in existingschema.rdefs:
continue
# check we should actually add the relation definition
if not (fromtype in new or totype in new or rschema in new):
continue
self.cmd_add_relation_definition(str(fromtype), rschema.type,
str(totype))
# execute post-create files
for pack in reversed(newcubes):
self.exec_event_script('postcreate', self.config.cube_dir(pack))
self.commit()
def cmd_remove_cube(self, cube, removedeps=False):
removedcubes = super(ServerMigrationHelper, self).cmd_remove_cube(
cube, removedeps)
if not removedcubes:
return
fsschema = self.fs_schema
removedcubes_schema = self.config.load_schema(construction_mode='non-strict')
reposchema = self.repo.schema
# execute pre-remove files
for pack in reversed(removedcubes):
self.exec_event_script('preremove', self.config.cube_dir(pack))
# remove cubes'entity and relation types
for rschema in fsschema.relations():
if not rschema in removedcubes_schema and rschema in reposchema:
self.cmd_drop_relation_type(rschema.type)
toremove = [eschema for eschema in fsschema.entities()
if not eschema in removedcubes_schema
and eschema in reposchema]
for eschema in reversed(order_eschemas(toremove)):
self.cmd_drop_entity_type(eschema.type)
for rschema in fsschema.relations():
if rschema in removedcubes_schema and rschema in reposchema:
# check if attributes/relations has been added to entities from
# other cubes
for fromtype, totype in rschema.rdefs:
if (fromtype, totype) not in removedcubes_schema[rschema.type].rdefs and \
(fromtype, totype) in reposchema[rschema.type].rdefs:
self.cmd_drop_relation_definition(
str(fromtype), rschema.type, str(totype))
# execute post-remove files
for cube in reversed(removedcubes):
self.exec_event_script('postremove', self.config.cube_dir(cube))
self.rqlexec('DELETE CWProperty X WHERE X pkey %(pk)s',
{'pk': u'system.version.'+cube}, ask_confirm=False)
self.commit()
# schema migration actions ################################################
def cmd_add_attribute(self, etype, attrname, attrtype=None, commit=True):
"""add a new attribute on the given entity type"""
if attrtype is None:
rschema = self.fs_schema.rschema(attrname)
attrtype = rschema.objects(etype)[0]
self.cmd_add_relation_definition(etype, attrname, attrtype, commit=commit)
def cmd_drop_attribute(self, etype, attrname, commit=True):
"""drop an existing attribute from the given entity type
`attrname` is a string giving the name of the attribute to drop
"""
rschema = self.repo.schema.rschema(attrname)
attrtype = rschema.objects(etype)[0]
self.cmd_drop_relation_definition(etype, attrname, attrtype, commit=commit)
def cmd_rename_attribute(self, etype, oldname, newname, commit=True):
"""rename an existing attribute of the given entity type
`oldname` is a string giving the name of the existing attribute
`newname` is a string giving the name of the renamed attribute
"""
eschema = self.fs_schema.eschema(etype)
attrtype = eschema.destination(newname)
# have to commit this first step anyway to get the definition
# actually in the schema
self.cmd_add_attribute(etype, newname, attrtype, commit=True)
# skipp NULL values if the attribute is required
rql = 'SET X %s VAL WHERE X is %s, X %s VAL' % (newname, etype, oldname)
card = eschema.rdef(newname).cardinality[0]
if card == '1':
rql += ', NOT X %s NULL' % oldname
self.rqlexec(rql, ask_confirm=self.verbosity>=2)
# XXX if both attributes fulltext indexed, should skip fti rebuild
# XXX if old attribute was fti indexed but not the new one old value
# won't be removed from the index (this occurs on other kind of
# fulltextindexed change...)
self.cmd_drop_attribute(etype, oldname, commit=commit)
def cmd_add_entity_type(self, etype, auto=True, commit=True):
"""register a new entity type
in auto mode, automatically register entity's relation where the
targeted type is known
"""
instschema = self.repo.schema
assert not etype in instschema
# # XXX (syt) plz explain: if we're adding an entity type, it should
# # not be there...
# eschema = instschema[etype]
# if eschema.final:
# instschema.del_entity_type(etype)
# else:
eschema = self.fs_schema.eschema(etype)
confirm = self.verbosity >= 2
groupmap = self.group_mapping()
cstrtypemap = self.cstrtype_mapping()
# register the entity into CWEType
execute = self._cw.execute
ss.execschemarql(execute, eschema, ss.eschema2rql(eschema, groupmap))
# add specializes relation if needed
specialized = eschema.specializes()
if specialized:
try:
specialized.eid = instschema[specialized].eid
except KeyError:
raise Exception('trying to add entity type but parent type is '
'not yet in the database schema')
self.rqlexecall(ss.eschemaspecialize2rql(eschema), ask_confirm=confirm)
# register entity's attributes
for rschema, attrschema in eschema.attribute_definitions():
# ignore those meta relations, they will be automatically added
if rschema.type in META_RTYPES:
continue
if not rschema.type in instschema:
# need to add the relation type and to commit to get it
# actually in the schema
self.cmd_add_relation_type(rschema.type, False, commit=True)
# register relation definition
rdef = self._get_rdef(rschema, eschema, eschema.destination(rschema))
ss.execschemarql(execute, rdef, ss.rdef2rql(rdef, cstrtypemap, groupmap),)
# take care to newly introduced base class
# XXX some part of this should probably be under the "if auto" block
for spschema in eschema.specialized_by(recursive=False):
try:
instspschema = instschema[spschema]
except KeyError:
# specialized entity type not in schema, ignore
continue
if instspschema.specializes() != eschema:
self.rqlexec('SET D specializes P WHERE D eid %(d)s, P name %(pn)s',
{'d': instspschema.eid, 'pn': eschema.type},
ask_confirm=confirm)
for rschema, tschemas, role in spschema.relation_definitions(True):
for tschema in tschemas:
if not tschema in instschema:
continue
if role == 'subject':
subjschema = spschema
objschema = tschema
if rschema.final and rschema in instspschema.subjrels:
# attribute already set, has_rdef would check if
# it's of the same type, we don't want this so
# simply skip here
continue
elif role == 'object':
subjschema = tschema
objschema = spschema
if (rschema.rdef(subjschema, objschema).infered
or (instschema.has_relation(rschema) and
(subjschema, objschema) in instschema[rschema].rdefs)):
continue
self.cmd_add_relation_definition(
subjschema.type, rschema.type, objschema.type)
if auto:
# we have commit here to get relation types actually in the schema
self.commit()
added = []
for rschema in eschema.subject_relations():
# attribute relation have already been processed and
# 'owned_by'/'created_by' will be automatically added
if rschema.final or rschema.type in META_RTYPES:
continue
rtypeadded = rschema.type in instschema
for targetschema in rschema.objects(etype):
# ignore relations where the targeted type is not in the
# current instance schema
targettype = targetschema.type
if not targettype in instschema and targettype != etype:
continue
if not rtypeadded:
# need to add the relation type and to commit to get it
# actually in the schema
added.append(rschema.type)
self.cmd_add_relation_type(rschema.type, False, commit=True)
rtypeadded = True
# register relation definition
# remember this two avoid adding twice non symmetric relation
# such as "Emailthread forked_from Emailthread"
added.append((etype, rschema.type, targettype))
rdef = self._get_rdef(rschema, eschema, targetschema)
ss.execschemarql(execute, rdef,
ss.rdef2rql(rdef, cstrtypemap, groupmap))
for rschema in eschema.object_relations():
if rschema.type in META_RTYPES:
continue
rtypeadded = rschema.type in instschema or rschema.type in added
for targetschema in rschema.subjects(etype):
# ignore relations where the targeted type is not in the
# current instance schema
targettype = targetschema.type
# don't check targettype != etype since in this case the
# relation has already been added as a subject relation
if not targettype in instschema:
continue
if not rtypeadded:
# need to add the relation type and to commit to get it
# actually in the schema
self.cmd_add_relation_type(rschema.type, False, commit=True)
rtypeadded = True
elif (targettype, rschema.type, etype) in added:
continue
# register relation definition
rdef = self._get_rdef(rschema, targetschema, eschema)
ss.execschemarql(execute, rdef,
ss.rdef2rql(rdef, cstrtypemap, groupmap))
if commit:
self.commit()
def cmd_drop_entity_type(self, etype, commit=True):
"""unregister an existing entity type
This will trigger deletion of necessary relation types and definitions
"""
# XXX what if we delete an entity type which is specialized by other types
# unregister the entity from CWEType
self.rqlexec('DELETE CWEType X WHERE X name %(etype)s', {'etype': etype},
ask_confirm=self.verbosity>=2)
if commit:
self.commit()
def cmd_rename_entity_type(self, oldname, newname, commit=True):
"""rename an existing entity type in the persistent schema
`oldname` is a string giving the name of the existing entity type
`newname` is a string giving the name of the renamed entity type
"""
schema = self.repo.schema
if newname in schema:
assert oldname in ETYPE_NAME_MAP, \
'%s should be mappend to %s in ETYPE_NAME_MAP' % (oldname, newname)
attrs = ','.join([SQL_PREFIX + rschema.type
for rschema in schema[newname].subject_relations()
if (rschema.final or rschema.inlined)
and not rschema in PURE_VIRTUAL_RTYPES])
self.sqlexec('INSERT INTO %s%s(%s) SELECT %s FROM %s%s' % (
SQL_PREFIX, newname, attrs, attrs, SQL_PREFIX, oldname))
# old entity type has not been added to the schema, can't gather it
new = schema.eschema(newname)
oldeid = self.rqlexec('CWEType ET WHERE ET name %(on)s', {'on': oldname},
ask_confirm=False)[0][0]
# backport old type relations to new type
# XXX workflows, other relations?
self.rqlexec('SET X from_entity NET WHERE X from_entity OET, '
'NOT EXISTS(X2 from_entity NET, X relation_type XRT, X2 relation_type XRT, '
'X to_entity XTE, X2 to_entity XTE), '
'OET eid %(o)s, NET eid %(n)s',
{'o': oldeid, 'n': new.eid}, ask_confirm=False)
self.rqlexec('SET X to_entity NET WHERE X to_entity OET, '
'NOT EXISTS(X2 to_entity NET, X relation_type XRT, X2 relation_type XRT, '
'X from_entity XTE, X2 from_entity XTE), '
'OET eid %(o)s, NET eid %(n)s',
{'o': oldeid, 'n': new.eid}, ask_confirm=False)
# remove the old type: use rql to propagate deletion
self.rqlexec('DELETE CWEType ET WHERE ET name %(on)s', {'on': oldname},
ask_confirm=False)
else:
self.rqlexec('SET ET name %(newname)s WHERE ET is CWEType, ET name %(on)s',
{'newname' : unicode(newname), 'on' : oldname},
ask_confirm=False)
if commit:
self.commit()
def cmd_add_relation_type(self, rtype, addrdef=True, commit=True):
"""register a new relation type named `rtype`, as described in the
schema description file.
`addrdef` is a boolean value; when True, it will also add all relations
of the type just added found in the schema definition file. Note that it
implies an intermediate "commit" which commits the relation type
creation (but not the relation definitions themselves, for which
committing depends on the `commit` argument value).
"""
reposchema = self.repo.schema
rschema = self.fs_schema.rschema(rtype)
execute = self._cw.execute
# register the relation into CWRType and insert necessary relation
# definitions
ss.execschemarql(execute, rschema, ss.rschema2rql(rschema, addrdef=False))
if addrdef:
self.commit()
gmap = self.group_mapping()
cmap = self.cstrtype_mapping()
for rdef in rschema.rdefs.itervalues():
if not (reposchema.has_entity(rdef.subject)
and reposchema.has_entity(rdef.object)):
continue
self._set_rdef_eid(rdef)
ss.execschemarql(execute, rdef,
ss.rdef2rql(rdef, cmap, gmap))
if rtype in META_RTYPES:
# if the relation is in META_RTYPES, ensure we're adding it for
# all entity types *in the persistent schema*, not only those in
# the fs schema
for etype in self.repo.schema.entities():
if not etype in self.fs_schema:
# get sample object type and rproperties
objtypes = rschema.objects()
assert len(objtypes) == 1, objtypes
objtype = objtypes[0]
rdef = copy(rschema.rdef(rschema.subjects(objtype)[0], objtype))
rdef.subject = etype
rdef.rtype = self.repo.schema.rschema(rschema)
rdef.object = self.repo.schema.rschema(objtype)
ss.execschemarql(execute, rdef,
ss.rdef2rql(rdef, cmap, gmap))
if commit:
self.commit()
def cmd_drop_relation_type(self, rtype, commit=True):
"""unregister an existing relation type"""
# unregister the relation from CWRType
self.rqlexec('DELETE CWRType X WHERE X name %r' % rtype,
ask_confirm=self.verbosity>=2)
if commit:
self.commit()
def cmd_rename_relation(self, oldname, newname, commit=True):
"""rename an existing relation
`oldname` is a string giving the name of the existing relation
`newname` is a string giving the name of the renamed relation
"""
self.cmd_add_relation_type(newname, commit=True)
self.rqlexec('SET X %s Y WHERE X %s Y' % (newname, oldname),
ask_confirm=self.verbosity>=2)
self.cmd_drop_relation_type(oldname, commit=commit)
def cmd_add_relation_definition(self, subjtype, rtype, objtype, commit=True):
"""register a new relation definition, from its definition found in the
schema definition file
"""
rschema = self.fs_schema.rschema(rtype)
if not rtype in self.repo.schema:
self.cmd_add_relation_type(rtype, addrdef=False, commit=True)
execute = self._cw.execute
rdef = self._get_rdef(rschema, subjtype, objtype)
ss.execschemarql(execute, rdef,
ss.rdef2rql(rdef, self.cstrtype_mapping(),
self.group_mapping()))
if commit:
self.commit()
def _get_rdef(self, rschema, subjtype, objtype):
return self._set_rdef_eid(rschema.rdefs[(subjtype, objtype)])
def _set_rdef_eid(self, rdef):
for attr in ('rtype', 'subject', 'object'):
schemaobj = getattr(rdef, attr)
if getattr(schemaobj, 'eid', None) is None:
schemaobj.eid = self.repo.schema[schemaobj].eid
assert schemaobj.eid is not None
return rdef
def cmd_drop_relation_definition(self, subjtype, rtype, objtype, commit=True):
"""unregister an existing relation definition"""
rschema = self.repo.schema.rschema(rtype)
# unregister the definition from CWAttribute or CWRelation
if rschema.final:
etype = 'CWAttribute'
else:
etype = 'CWRelation'
rql = ('DELETE %s X WHERE X from_entity FE, FE name "%s",'
'X relation_type RT, RT name "%s", X to_entity TE, TE name "%s"')
self.rqlexec(rql % (etype, subjtype, rtype, objtype),
ask_confirm=self.verbosity>=2)
if commit:
self.commit()
def cmd_sync_schema_props_perms(self, ertype=None, syncperms=True,
syncprops=True, syncrdefs=True, commit=True):
"""synchronize the persistent schema against the current definition
schema.
It will synch common stuff between the definition schema and the
actual persistent schema, it won't add/remove any entity or relation.
"""
assert syncperms or syncprops, 'nothing to do'
if ertype is not None:
if isinstance(ertype, (tuple, list)):
assert len(ertype) == 3, 'not a relation definition'
self._synchronize_rdef_schema(ertype[0], ertype[1], ertype[2],
syncperms=syncperms,
syncprops=syncprops)
else:
erschema = self.repo.schema[ertype]
if isinstance(erschema, CubicWebRelationSchema):
self._synchronize_rschema(erschema, syncrdefs=syncrdefs,
syncperms=syncperms,
syncprops=syncprops)
else:
self._synchronize_eschema(erschema, syncrdefs=syncrdefs,
syncperms=syncperms,
syncprops=syncprops)
else:
for etype in self.repo.schema.entities():
self._synchronize_eschema(etype, syncrdefs=syncrdefs,
syncprops=syncprops, syncperms=syncperms)
if commit:
self.commit()
def cmd_change_relation_props(self, subjtype, rtype, objtype,
commit=True, **kwargs):
"""change some properties of a relation definition
you usually want to use sync_schema_props_perms instead.
"""
assert kwargs
restriction = []
if subjtype and subjtype != 'Any':
restriction.append('X from_entity FE, FE name "%s"' % subjtype)
if objtype and objtype != 'Any':
restriction.append('X to_entity TE, TE name "%s"' % objtype)
if rtype and rtype != 'Any':
restriction.append('X relation_type RT, RT name "%s"' % rtype)
assert restriction
values = []
for k, v in kwargs.items():
values.append('X %s %%(%s)s' % (k, k))
if isinstance(v, str):
kwargs[k] = unicode(v)
rql = 'SET %s WHERE %s' % (','.join(values), ','.join(restriction))
self.rqlexec(rql, kwargs, ask_confirm=self.verbosity>=2)
if commit:
self.commit()
def cmd_set_size_constraint(self, etype, rtype, size, commit=True):
"""set change size constraint of a string attribute
if size is None any size constraint will be removed.
you usually want to use sync_schema_props_perms instead.
"""
oldvalue = None
for constr in self.repo.schema.eschema(etype).rdef(rtype).constraints:
if isinstance(constr, SizeConstraint):
oldvalue = constr.max
if oldvalue == size:
return
if oldvalue is None and not size is None:
ceid = self.rqlexec('INSERT CWConstraint C: C value %(v)s, C cstrtype CT '
'WHERE CT name "SizeConstraint"',
{'v': SizeConstraint(size).serialize()},
ask_confirm=self.verbosity>=2)[0][0]
self.rqlexec('SET X constrained_by C WHERE X from_entity S, X relation_type R, '
'S name "%s", R name "%s", C eid %s' % (etype, rtype, ceid),
ask_confirm=self.verbosity>=2)
elif not oldvalue is None:
if not size is None:
self.rqlexec('SET C value %%(v)s WHERE X from_entity S, X relation_type R,'
'X constrained_by C, C cstrtype CT, CT name "SizeConstraint",'
'S name "%s", R name "%s"' % (etype, rtype),
{'v': unicode(SizeConstraint(size).serialize())},
ask_confirm=self.verbosity>=2)
else:
self.rqlexec('DELETE X constrained_by C WHERE X from_entity S, X relation_type R,'
'X constrained_by C, C cstrtype CT, CT name "SizeConstraint",'
'S name "%s", R name "%s"' % (etype, rtype),
ask_confirm=self.verbosity>=2)
# cleanup unused constraints
self.rqlexec('DELETE CWConstraint C WHERE NOT X constrained_by C')
if commit:
self.commit()
@deprecated('[3.2] use sync_schema_props_perms(ertype, syncprops=False)')
def cmd_synchronize_permissions(self, ertype, commit=True):
self.cmd_sync_schema_props_perms(ertype, syncprops=False, commit=commit)
# Workflows handling ######################################################
def cmd_add_workflow(self, name, wfof, default=True, commit=False,
**kwargs):
"""
create a new workflow and links it to entity types
:type name: unicode
:param name: name of the workflow
:type wfof: string or list/tuple of strings
:param wfof: entity type(s) having this workflow
:type default: bool
:param default: tells wether this is the default workflow
for the specified entity type(s); set it to false in
the case of a subworkflow
:rtype: `Workflow`
"""
wf = self.cmd_create_entity('Workflow', name=unicode(name),
**kwargs)
if not isinstance(wfof, (list, tuple)):
wfof = (wfof,)
for etype in wfof:
rset = self.rqlexec(
'SET X workflow_of ET WHERE X eid %(x)s, ET name %(et)s',
{'x': wf.eid, 'et': etype}, ask_confirm=False)
assert rset, 'unexistant entity type %s' % etype
if default:
self.rqlexec(
'SET ET default_workflow X WHERE X eid %(x)s, ET name %(et)s',
{'x': wf.eid, 'et': etype}, ask_confirm=False)
if commit:
self.commit()
return wf
# XXX remove once cmd_add_[state|transition] are removed
def _get_or_create_wf(self, etypes):
if not isinstance(etypes, (list, tuple)):
etypes = (etypes,)
rset = self.rqlexec('Workflow X WHERE X workflow_of ET, ET name %(et)s',
{'et': etypes[0]})
if rset:
return rset.get_entity(0, 0)
return self.cmd_add_workflow('%s workflow' % ';'.join(etypes), etypes)
@deprecated('[3.5] use add_workflow and Workflow.add_state method',
stacklevel=3)
def cmd_add_state(self, name, stateof, initial=False, commit=False, **kwargs):
"""method to ease workflow definition: add a state for one or more
entity type(s)
"""
wf = self._get_or_create_wf(stateof)
state = wf.add_state(name, initial, **kwargs)
if commit:
self.commit()
return state.eid
@deprecated('[3.5] use add_workflow and Workflow.add_transition method',
stacklevel=3)
def cmd_add_transition(self, name, transitionof, fromstates, tostate,
requiredgroups=(), conditions=(), commit=False, **kwargs):
"""method to ease workflow definition: add a transition for one or more
entity type(s), from one or more state and to a single state
"""
wf = self._get_or_create_wf(transitionof)
tr = wf.add_transition(name, fromstates, tostate, requiredgroups,
conditions, **kwargs)
if commit:
self.commit()
return tr.eid
@deprecated('[3.5] use Transition.set_transition_permissions method',
stacklevel=3)
def cmd_set_transition_permissions(self, treid,
requiredgroups=(), conditions=(),
reset=True, commit=False):
"""set or add (if `reset` is False) groups and conditions for a
transition
"""
tr = self._cw.entity_from_eid(treid)
tr.set_transition_permissions(requiredgroups, conditions, reset)
if commit:
self.commit()
@deprecated('[3.5] use iworkflowable.fire_transition("transition") or '
'iworkflowable.change_state("state")', stacklevel=3)
def cmd_set_state(self, eid, statename, commit=False):
self._cw.entity_from_eid(eid).cw_adapt_to('IWorkflowable').change_state(statename)
if commit:
self.commit()
# CWProperty handling ######################################################
def cmd_property_value(self, pkey):
rql = 'Any V WHERE X is CWProperty, X pkey %(k)s, X value V'
rset = self.rqlexec(rql, {'k': pkey}, ask_confirm=False)
return rset[0][0]
def cmd_set_property(self, pkey, value):
value = unicode(value)
try:
prop = self.rqlexec('CWProperty X WHERE X pkey %(k)s', {'k': pkey},
ask_confirm=False).get_entity(0, 0)
except:
self.cmd_create_entity('CWProperty', pkey=unicode(pkey), value=value)
else:
self.rqlexec('SET X value %(v)s WHERE X pkey %(k)s',
{'k': pkey, 'v': value}, ask_confirm=False)
# other data migration commands ###########################################
@property
def _cw(self):
session = self.session
if session is not None:
session.set_pool()
return session
return self.cnx.request()
def cmd_storage_changed(self, etype, attribute):
"""migrate entities to a custom storage. The new storage is expected to
be set, it will be temporarily removed for the migration.
"""
from logilab.common.shellutils import ProgressBar
source = self.repo.system_source
storage = source.storage(etype, attribute)
source.unset_storage(etype, attribute)
rset = self.rqlexec('Any X WHERE X is %s' % etype, ask_confirm=False)
pb = ProgressBar(len(rset))
for entity in rset.entities():
# fill cache. Do not fetch that attribute using the global rql query
# since we may exhaust memory doing that....
getattr(entity, attribute)
storage.migrate_entity(entity, attribute)
# remove from entity cache to avoid memory exhaustion
del entity[attribute]
pb.update()
print
source.set_storage(etype, attribute, storage)
def cmd_create_entity(self, etype, commit=False, **kwargs):
"""add a new entity of the given type"""
entity = self._cw.create_entity(etype, **kwargs)
if commit:
self.commit()
return entity
def cmd_update_etype_fti_weight(self, etype, weight):
if self.repo.system_source.dbdriver == 'postgres':
self.sqlexec('UPDATE appears SET weight=%(weight)s '
'FROM entities as X '
'WHERE X.eid=appears.uid AND X.type=%(type)s',
{'type': etype, 'weight': weight}, ask_confirm=False)
def cmd_reindex_entities(self, etypes=None):
"""force reindexaction of entities of the given types or of all
indexable entity types
"""
from cubicweb.server.checkintegrity import reindex_entities
reindex_entities(self.repo.schema, self.session, etypes=etypes)
@deprecated('[3.5] use create_entity', stacklevel=3)
def cmd_add_entity(self, etype, *args, **kwargs):
"""add a new entity of the given type"""
return self.cmd_create_entity(etype, *args, **kwargs).eid
def sqlexec(self, sql, args=None, ask_confirm=True):
"""execute the given sql if confirmed
should only be used for low level stuff undoable with existing higher
level actions
"""
if not ask_confirm or self.confirm('Execute sql: %s ?' % sql):
try:
cu = self.session.system_sql(sql, args)
except:
ex = sys.exc_info()[1]
if self.confirm('Error: %s\nabort?' % ex):
raise
return
try:
return cu.fetchall()
except:
# no result to fetch
return
def rqlexec(self, rql, kwargs=None, cachekey=None, build_descr=True,
ask_confirm=True):
"""rql action"""
if cachekey is not None:
warn('[3.8] cachekey is deprecated, you can safely remove this argument',
DeprecationWarning, stacklevel=2)
if not isinstance(rql, (tuple, list)):
rql = ( (rql, kwargs), )
res = None
execute = self._cw.execute
for rql, kwargs in rql:
if kwargs:
msg = '%s (%s)' % (rql, kwargs)
else:
msg = rql
if not ask_confirm or self.confirm('Execute rql: %s ?' % msg):
try:
res = execute(rql, kwargs, build_descr=build_descr)
except Exception, ex:
if self.confirm('Error: %s\nabort?' % ex):
raise
return res
def rqliter(self, rql, kwargs=None, ask_confirm=True):
return ForRqlIterator(self, rql, None, ask_confirm)
# broken db commands ######################################################
def cmd_change_attribute_type(self, etype, attr, newtype, commit=True):
"""low level method to change the type of an entity attribute. This is
a quick hack which has some drawback:
* only works when the old type can be changed to the new type by the
underlying rdbms (eg using ALTER TABLE)
* the actual schema won't be updated until next startup
"""
rschema = self.repo.schema.rschema(attr)
oldtype = rschema.objects(etype)[0]
rdefeid = rschema.rproperty(etype, oldtype, 'eid')
sql = ("UPDATE CWAttribute "
"SET to_entity=(SELECT eid FROM CWEType WHERE name='%s')"
"WHERE eid=%s") % (newtype, rdefeid)
self.sqlexec(sql, ask_confirm=False)
dbhelper = self.repo.system_source.dbhelper
sqltype = dbhelper.TYPE_MAPPING[newtype]
sql = 'ALTER TABLE %s ALTER COLUMN %s TYPE %s' % (etype, attr, sqltype)
self.sqlexec(sql, ask_confirm=False)
if commit:
self.commit()
def cmd_add_entity_type_table(self, etype, commit=True):
"""low level method to create the sql table for an existing entity.
This may be useful on accidental desync between the repository schema
and a sql database
"""
dbhelper = self.repo.system_source.dbhelper
tablesql = eschema2sql(dbhelper, self.repo.schema.eschema(etype),
prefix=SQL_PREFIX)
for sql in tablesql.split(';'):
if sql.strip():
self.sqlexec(sql)
if commit:
self.commit()
def cmd_add_relation_type_table(self, rtype, commit=True):
"""low level method to create the sql table for an existing relation.
This may be useful on accidental desync between the repository schema
and a sql database
"""
dbhelper = self.repo.system_source.dbhelper
tablesql = rschema2sql(dbhelper, self.repo.schema.rschema(rtype))
for sql in tablesql.split(';'):
if sql.strip():
self.sqlexec(sql)
if commit:
self.commit()
@deprecated("[3.7] use session.disable_hook_categories('integrity')")
def cmd_deactivate_verification_hooks(self):
self.session.disable_hook_categories('integrity')
@deprecated("[3.7] use session.enable_hook_categories('integrity')")
def cmd_reactivate_verification_hooks(self):
self.session.enable_hook_categories('integrity')
class ForRqlIterator:
"""specific rql iterator to make the loop skipable"""
def __init__(self, helper, rql, kwargs, ask_confirm):
self._h = helper
self.rql = rql
self.kwargs = kwargs
self.ask_confirm = ask_confirm
self._rsetit = None
def __iter__(self):
return self
def next(self):
if self._rsetit is not None:
return self._rsetit.next()
rql, kwargs = self.rql, self.kwargs
if kwargs:
msg = '%s (%s)' % (rql, kwargs)
else:
msg = rql
if self.ask_confirm:
if not self._h.confirm('Execute rql: %s ?' % msg):
raise StopIteration
try:
rset = self._h._cw.execute(rql, kwargs)
except Exception, ex:
if self._h.confirm('Error: %s\nabort?' % ex):
raise
else:
raise StopIteration
self._rsetit = iter(rset)
return self._rsetit.next()