author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Fri, 16 Sep 2011 14:43:41 +0200 | |
branch | stable |
changeset 7804 | 814fb7f379a3 |
parent 7341 | c419c2d0d13e |
child 7904 | f41bb38dda7c |
child 7906 | 203d574c8a1d |
permissions | -rw-r--r-- |
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# copyright 2003-2011 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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5 |
# |
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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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[fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
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"""SQL utilities functions and classes.""" |
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__docformat__ = "restructuredtext en" |
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||
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import os |
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import subprocess |
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from datetime import datetime, date |
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|
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from logilab import database as db, common as lgc |
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from logilab.common.shellutils import ProgressBar |
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from logilab.common.date import todate, todatetime, utcdatetime, utctime |
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from logilab.database.sqlgen import SQLGenerator |
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from cubicweb import Binary, ConfigurationError |
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from cubicweb.uilib import remove_html_tags |
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from cubicweb.schema import PURE_VIRTUAL_RTYPES |
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from cubicweb.server import SQL_CONNECT_HOOKS |
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from cubicweb.server.utils import crypt_password |
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from rql.utils import RQL_FUNCTIONS_REGISTRY |
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lgc.USE_MX_DATETIME = False |
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SQL_PREFIX = 'cw_' |
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|
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def _run_command(cmd): |
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"""backup/restore command are string w/ lgc < 0.47, lists with earlier versions |
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""" |
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if isinstance(cmd, basestring): |
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print '->', cmd |
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return subprocess.call(cmd, shell=True) |
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print ' '.join(cmd) |
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return subprocess.call(cmd) |
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0 | 50 |
|
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def sqlexec(sqlstmts, cursor_or_execute, withpb=not os.environ.get('APYCOT_ROOT'), |
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pbtitle='', delimiter=';'): |
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"""execute sql statements ignoring DROP/ CREATE GROUP or USER statements |
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error. If a cnx is given, commit at each statement |
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""" |
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if hasattr(cursor_or_execute, 'execute'): |
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execute = cursor_or_execute.execute |
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else: |
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execute = cursor_or_execute |
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sqlstmts = sqlstmts.split(delimiter) |
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if withpb: |
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pb = ProgressBar(len(sqlstmts), title=pbtitle) |
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for sql in sqlstmts: |
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sql = sql.strip() |
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if withpb: |
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pb.update() |
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if not sql: |
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continue |
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# some dbapi modules doesn't accept unicode for sql string |
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execute(str(sql)) |
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if withpb: |
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print |
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def sqlgrants(schema, driver, user, |
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text_index=True, set_owner=True, |
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skip_relations=(), skip_entities=()): |
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"""return sql to give all access privileges to the given user on the system |
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schema |
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""" |
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from yams.schema2sql import grant_schema |
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from cubicweb.server.sources import native |
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output = [] |
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w = output.append |
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w(native.grant_schema(user, set_owner)) |
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w('') |
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if text_index: |
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dbhelper = db.get_db_helper(driver) |
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w(dbhelper.sql_grant_user_on_fti(user)) |
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w('') |
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w(grant_schema(schema, user, set_owner, skip_entities=skip_entities, prefix=SQL_PREFIX)) |
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return '\n'.join(output) |
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def sqlschema(schema, driver, text_index=True, |
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user=None, set_owner=False, |
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skip_relations=PURE_VIRTUAL_RTYPES, skip_entities=()): |
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"""return the system sql schema, according to the given parameters""" |
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from yams.schema2sql import schema2sql |
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from cubicweb.server.sources import native |
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if set_owner: |
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assert user, 'user is argument required when set_owner is true' |
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output = [] |
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w = output.append |
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w(native.sql_schema(driver)) |
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w('') |
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dbhelper = db.get_db_helper(driver) |
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if text_index: |
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w(dbhelper.sql_init_fti().replace(';', ';;')) |
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w('') |
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w(schema2sql(dbhelper, schema, prefix=SQL_PREFIX, |
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skip_entities=skip_entities, |
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skip_relations=skip_relations).replace(';', ';;')) |
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if dbhelper.users_support and user: |
115 |
w('') |
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w(sqlgrants(schema, driver, user, text_index, set_owner, |
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skip_relations, skip_entities).replace(';', ';;')) |
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return '\n'.join(output) |
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def sqldropschema(schema, driver, text_index=True, |
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skip_relations=PURE_VIRTUAL_RTYPES, skip_entities=()): |
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"""return the sql to drop the schema, according to the given parameters""" |
124 |
from yams.schema2sql import dropschema2sql |
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from cubicweb.server.sources import native |
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output = [] |
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w = output.append |
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if text_index: |
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dbhelper = db.get_db_helper(driver) |
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130 |
w(dbhelper.sql_drop_fti()) |
0 | 131 |
w('') |
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w(dropschema2sql(schema, prefix=SQL_PREFIX, |
1954 | 133 |
skip_entities=skip_entities, |
134 |
skip_relations=skip_relations)) |
|
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w('') |
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136 |
w(native.sql_drop_schema(driver)) |
0 | 137 |
return '\n'.join(output) |
138 |
||
139 |
||
140 |
class SQLAdapterMixIn(object): |
|
141 |
"""Mixin for SQL data sources, getting a connection from a configuration |
|
142 |
dictionary and handling connection locking |
|
143 |
""" |
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|
0 | 145 |
def __init__(self, source_config): |
146 |
try: |
|
147 |
self.dbdriver = source_config['db-driver'].lower() |
|
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148 |
dbname = source_config['db-name'] |
0 | 149 |
except KeyError: |
150 |
raise ConfigurationError('missing some expected entries in sources file') |
|
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151 |
dbhost = source_config.get('db-host') |
0 | 152 |
port = source_config.get('db-port') |
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dbport = port and int(port) or None |
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154 |
dbuser = source_config.get('db-user') |
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155 |
dbpassword = source_config.get('db-password') |
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156 |
dbencoding = source_config.get('db-encoding', 'UTF-8') |
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157 |
dbextraargs = source_config.get('db-extra-arguments') |
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parents:
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158 |
self.dbhelper = db.get_db_helper(self.dbdriver) |
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[repo] use logilab.db instead of lgc.adbh/lgc.db/lgc.sqlgen/indexer, test new date extranction functions
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159 |
self.dbhelper.record_connection_info(dbname, dbhost, dbport, dbuser, |
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160 |
dbpassword, dbextraargs, |
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161 |
dbencoding) |
0 | 162 |
self.sqlgen = SQLGenerator() |
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163 |
# copy back some commonly accessed attributes |
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164 |
dbapi_module = self.dbhelper.dbapi_module |
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165 |
self.OperationalError = dbapi_module.OperationalError |
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166 |
self.InterfaceError = dbapi_module.InterfaceError |
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167 |
self.DbapiError = dbapi_module.Error |
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168 |
self._binary = self.dbhelper.binary_value |
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169 |
self._process_value = dbapi_module.process_value |
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170 |
self._dbencoding = dbencoding |
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171 |
|
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172 |
def get_connection(self): |
0 | 173 |
"""open and return a connection to the database""" |
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174 |
return self.dbhelper.get_connection() |
0 | 175 |
|
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176 |
def backup_to_file(self, backupfile, confirm): |
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for cmd in self.dbhelper.backup_commands(backupfile, |
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178 |
keepownership=False): |
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179 |
if _run_command(cmd): |
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180 |
if not confirm(' [Failed] Continue anyway?', default='n'): |
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181 |
raise Exception('Failed command: %s' % cmd) |
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182 |
|
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183 |
def restore_from_file(self, backupfile, confirm, drop=True): |
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184 |
for cmd in self.dbhelper.restore_commands(backupfile, |
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185 |
keepownership=False, |
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186 |
drop=drop): |
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187 |
if _run_command(cmd): |
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188 |
if not confirm(' [Failed] Continue anyway?', default='n'): |
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189 |
raise Exception('Failed command: %s' % cmd) |
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190 |
|
0 | 191 |
def merge_args(self, args, query_args): |
192 |
if args is not None: |
|
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193 |
newargs = {} |
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194 |
for key, val in args.iteritems(): |
0 | 195 |
# convert cubicweb binary into db binary |
196 |
if isinstance(val, Binary): |
|
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197 |
val = self._binary(val.getvalue()) |
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198 |
newargs[key] = val |
0 | 199 |
# should not collide |
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200 |
newargs.update(query_args) |
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201 |
return newargs |
0 | 202 |
return query_args |
203 |
||
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204 |
def process_result(self, cursor, column_callbacks=None, session=None): |
0 | 205 |
"""return a list of CubicWeb compliant values from data in the given cursor |
206 |
""" |
|
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207 |
return list(self.iter_process_result(cursor, column_callbacks, session)) |
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208 |
|
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209 |
def iter_process_result(self, cursor, column_callbacks=None, session=None): |
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210 |
"""return a iterator on tuples of CubicWeb compliant values from data |
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211 |
in the given cursor |
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212 |
""" |
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213 |
# use two different implementations to avoid paying the price of |
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214 |
# callback lookup for each *cell* in results when there is nothing to |
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215 |
# lookup |
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216 |
if not column_callbacks: |
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217 |
return self._process_result(cursor) |
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218 |
assert session |
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219 |
return self._cb_process_result(cursor, column_callbacks, session) |
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220 |
|
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|
221 |
def _process_result(self, cursor): |
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222 |
# begin bind to locals for optimization |
0 | 223 |
descr = cursor.description |
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224 |
encoding = self._dbencoding |
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225 |
process_value = self._process_value |
0 | 226 |
binary = Binary |
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|
227 |
# /end |
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228 |
cursor.arraysize = 100 |
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|
229 |
while True: |
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230 |
results = cursor.fetchmany() |
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231 |
if not results: |
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232 |
break |
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233 |
for line in results: |
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234 |
result = [] |
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235 |
for col, value in enumerate(line): |
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|
236 |
if value is None: |
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|
237 |
result.append(value) |
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238 |
continue |
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|
239 |
result.append(process_value(value, descr[col], encoding, binary)) |
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|
240 |
yield result |
0 | 241 |
|
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242 |
def _cb_process_result(self, cursor, column_callbacks, session): |
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243 |
# begin bind to locals for optimization |
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244 |
descr = cursor.description |
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245 |
encoding = self._dbencoding |
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246 |
process_value = self._process_value |
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247 |
binary = Binary |
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248 |
# /end |
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249 |
cursor.arraysize = 100 |
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250 |
while True: |
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251 |
results = cursor.fetchmany() |
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252 |
if not results: |
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|
253 |
break |
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254 |
for line in results: |
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255 |
result = [] |
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|
256 |
for col, value in enumerate(line): |
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if value is None: |
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258 |
result.append(value) |
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259 |
continue |
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260 |
cbstack = column_callbacks.get(col, None) |
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261 |
if cbstack is None: |
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262 |
value = process_value(value, descr[col], encoding, binary) |
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263 |
else: |
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264 |
for cb in cbstack: |
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265 |
value = cb(self, session, value) |
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266 |
result.append(value) |
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267 |
yield result |
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268 |
|
0 | 269 |
def preprocess_entity(self, entity): |
270 |
"""return a dictionary to use as extra argument to cursor.execute |
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to insert/update an entity into a SQL database |
0 | 272 |
""" |
273 |
attrs = {} |
|
274 |
eschema = entity.e_schema |
|
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for attr, value in entity.cw_edited.iteritems(): |
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if value is not None and eschema.subjrels[attr].final: |
0 | 277 |
atype = str(entity.e_schema.destination(attr)) |
278 |
if atype == 'Boolean': |
|
279 |
value = self.dbhelper.boolean_value(value) |
|
280 |
elif atype == 'Password': |
|
281 |
# if value is a Binary instance, this mean we got it |
|
282 |
# from a query result and so it is already encrypted |
|
283 |
if isinstance(value, Binary): |
|
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value = value.getvalue() |
|
285 |
else: |
|
286 |
value = crypt_password(value) |
|
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value = self._binary(value) |
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# XXX needed for sqlite but I don't think it is for other backends |
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# Note: use is __class__ since issubclass(datetime, date) |
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290 |
elif atype in ('Datetime', 'TZDatetime') and type(value) is date: |
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value = todatetime(value) |
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elif atype == 'Date' and isinstance(value, datetime): |
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value = todate(value) |
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294 |
elif atype == 'TZDatetime' and getattr(value, 'tzinfo', None): |
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295 |
value = utcdatetime(value) |
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296 |
elif atype == 'TZTime' and getattr(value, 'tzinfo', None): |
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297 |
value = utctime(value) |
0 | 298 |
elif isinstance(value, Binary): |
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value = self._binary(value.getvalue()) |
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attrs[SQL_PREFIX+str(attr)] = value |
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|
301 |
attrs[SQL_PREFIX+'eid'] = entity.eid |
0 | 302 |
return attrs |
303 |
||
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304 |
# these are overridden by set_log_methods below |
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305 |
# only defining here to prevent pylint from complaining |
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info = warning = error = critical = exception = debug = lambda msg,*a,**kw: None |
0 | 307 |
|
308 |
from logging import getLogger |
|
309 |
from cubicweb import set_log_methods |
|
310 |
set_log_methods(SQLAdapterMixIn, getLogger('cubicweb.sqladapter')) |
|
311 |
||
312 |
def init_sqlite_connexion(cnx): |
|
313 |
||
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314 |
class group_concat(object): |
0 | 315 |
def __init__(self): |
316 |
self.values = [] |
|
317 |
def step(self, value): |
|
318 |
if value is not None: |
|
319 |
self.values.append(value) |
|
320 |
def finalize(self): |
|
321 |
return ', '.join(self.values) |
|
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|
322 |
cnx.create_aggregate("GROUP_CONCAT", 1, group_concat) |
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323 |
|
0 | 324 |
def _limit_size(text, maxsize, format='text/plain'): |
325 |
if len(text) < maxsize: |
|
326 |
return text |
|
327 |
if format in ('text/html', 'text/xhtml', 'text/xml'): |
|
328 |
text = remove_html_tags(text) |
|
329 |
if len(text) > maxsize: |
|
330 |
text = text[:maxsize] + '...' |
|
331 |
return text |
|
332 |
||
333 |
def limit_size3(text, format, maxsize): |
|
334 |
return _limit_size(text, maxsize, format) |
|
335 |
cnx.create_function("LIMIT_SIZE", 3, limit_size3) |
|
336 |
||
337 |
def limit_size2(text, maxsize): |
|
338 |
return _limit_size(text, maxsize) |
|
339 |
cnx.create_function("TEXT_LIMIT_SIZE", 2, limit_size2) |
|
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|
340 |
|
0 | 341 |
import yams.constraints |
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|
342 |
yams.constraints.patch_sqlite_decimal() |
0 | 343 |
|
344 |
sqlite_hooks = SQL_CONNECT_HOOKS.setdefault('sqlite', []) |
|
345 |
sqlite_hooks.append(init_sqlite_connexion) |
|
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|
346 |
|
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|
347 |
|
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|
348 |
def init_postgres_connexion(cnx): |
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349 |
cnx.cursor().execute('SET TIME ZONE UTC') |
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|
350 |
# commit is needed, else setting are lost if the connection is first |
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|
351 |
# rollbacked |
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|
352 |
cnx.commit() |
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|
353 |
|
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|
354 |
postgres_hooks = SQL_CONNECT_HOOKS.setdefault('postgres', []) |
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|
355 |
postgres_hooks.append(init_postgres_connexion) |