author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Tue, 29 Sep 2009 12:41:46 +0200 | |
branch | stable |
changeset 3513 | c002f6488631 |
parent 2759 | 23d7a75693f8 |
child 3623 | 9b838e2d72bb |
permissions | -rw-r--r-- |
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"""SQL utilities functions and classes. |
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:organization: Logilab |
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1977
606923dff11b
big bunch of copyright / docstring update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1954
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4 |
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2. |
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr |
1977
606923dff11b
big bunch of copyright / docstring update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1954
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6 |
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses |
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""" |
8 |
__docformat__ = "restructuredtext en" |
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import os |
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from os.path import exists |
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from warnings import warn |
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from datetime import datetime, date, timedelta |
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import logilab.common as lgc |
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from logilab.common.shellutils import ProgressBar |
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from logilab.common import db |
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from logilab.common.adbh import get_adv_func_helper |
19 |
from logilab.common.sqlgen import SQLGenerator |
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20 |
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from indexer import get_indexer |
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from cubicweb import Binary, ConfigurationError |
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from cubicweb.utils import todate, todatetime |
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from cubicweb.common.uilib import remove_html_tags |
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from cubicweb.toolsutils import restrict_perms_to_user |
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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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31 |
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lgc.USE_MX_DATETIME = False |
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SQL_PREFIX = 'cw_' |
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def sqlexec(sqlstmts, cursor_or_execute, withpb=True, pbtitle='', delimiter=';'): |
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"""execute sql statements ignoring DROP/ CREATE GROUP or USER statements |
38 |
error. If a cnx is given, commit at each statement |
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39 |
""" |
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40 |
if hasattr(cursor_or_execute, 'execute'): |
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execute = cursor_or_execute.execute |
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42 |
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: |
48 |
sql = sql.strip() |
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49 |
if withpb: |
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pb.update() |
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51 |
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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60 |
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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69 |
w(native.grant_schema(user, set_owner)) |
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w('') |
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if text_index: |
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indexer = get_indexer(driver) |
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73 |
w(indexer.sql_grant_user(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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if text_index: |
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indexer = get_indexer(driver) |
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w(indexer.sql_init_fti()) |
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w('') |
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dbhelper = get_adv_func_helper(driver) |
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w(schema2sql(dbhelper, schema, prefix=SQL_PREFIX, |
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skip_entities=skip_entities, skip_relations=skip_relations)) |
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if dbhelper.users_support and user: |
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w('') |
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w(sqlgrants(schema, driver, user, text_index, set_owner, |
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skip_relations, skip_entities)) |
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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""" |
108 |
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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w(native.sql_drop_schema(driver)) |
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w('') |
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if text_index: |
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indexer = get_indexer(driver) |
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w(indexer.sql_drop_fti()) |
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117 |
w('') |
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w(dropschema2sql(schema, prefix=SQL_PREFIX, |
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skip_entities=skip_entities, |
120 |
skip_relations=skip_relations)) |
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return '\n'.join(output) |
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try: |
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from mx.DateTime import DateTimeType, DateTimeDeltaType |
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except ImportError: |
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DateTimeType = DateTimeDeltaType = None |
0 | 127 |
|
128 |
class SQLAdapterMixIn(object): |
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"""Mixin for SQL data sources, getting a connection from a configuration |
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dictionary and handling connection locking |
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""" |
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def __init__(self, source_config): |
134 |
try: |
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135 |
self.dbdriver = source_config['db-driver'].lower() |
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136 |
self.dbname = source_config['db-name'] |
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137 |
except KeyError: |
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138 |
raise ConfigurationError('missing some expected entries in sources file') |
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139 |
self.dbhost = source_config.get('db-host') |
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140 |
port = source_config.get('db-port') |
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141 |
self.dbport = port and int(port) or None |
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142 |
self.dbuser = source_config.get('db-user') |
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self.dbpasswd = source_config.get('db-password') |
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self.encoding = source_config.get('db-encoding', 'UTF-8') |
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self.dbapi_module = db.get_dbapi_compliant_module(self.dbdriver) |
0 | 146 |
self.binary = self.dbapi_module.Binary |
147 |
self.dbhelper = self.dbapi_module.adv_func_helper |
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148 |
self.sqlgen = SQLGenerator() |
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0 | 150 |
def get_connection(self, user=None, password=None): |
151 |
"""open and return a connection to the database""" |
|
152 |
if user or self.dbuser: |
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153 |
self.info('connecting to %s@%s for user %s', self.dbname, |
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154 |
self.dbhost or 'localhost', user or self.dbuser) |
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155 |
else: |
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156 |
self.info('connecting to %s@%s', self.dbname, |
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157 |
self.dbhost or 'localhost') |
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158 |
cnx = self.dbapi_module.connect(self.dbhost, self.dbname, |
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159 |
user or self.dbuser, |
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160 |
password or self.dbpasswd, |
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161 |
port=self.dbport) |
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162 |
init_cnx(self.dbdriver, cnx) |
|
163 |
#self.dbapi_module.type_code_test(cnx.cursor()) |
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164 |
return cnx |
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def backup_to_file(self, backupfile): |
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cmd = self.dbhelper.backup_command(self.dbname, self.dbhost, |
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self.dbuser, backupfile, |
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keepownership=False) |
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if os.system(cmd): |
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raise Exception('Failed command: %s' % cmd) |
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def restore_from_file(self, backupfile, confirm, drop=True): |
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for cmd in self.dbhelper.restore_commands(self.dbname, self.dbhost, |
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self.dbuser, backupfile, |
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self.encoding, |
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keepownership=False, |
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drop=drop): |
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if os.system(cmd): |
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raise Exception('Failed command: %s' % cmd) |
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181 |
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0 | 182 |
def merge_args(self, args, query_args): |
183 |
if args is not None: |
|
184 |
args = dict(args) |
|
185 |
for key, val in args.items(): |
|
186 |
# convert cubicweb binary into db binary |
|
187 |
if isinstance(val, Binary): |
|
188 |
val = self.binary(val.getvalue()) |
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# XXX <3.2 bw compat |
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190 |
elif type(val) is DateTimeType: |
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warn('found mx date time instance, please update to use datetime', |
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DeprecationWarning) |
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193 |
val = datetime(val.year, val.month, val.day, |
1026 | 194 |
val.hour, val.minute, int(val.second)) |
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elif type(val) is DateTimeDeltaType: |
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warn('found mx date time instance, please update to use datetime', |
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197 |
DeprecationWarning) |
1026 | 198 |
val = timedelta(0, int(val.seconds), 0) |
0 | 199 |
args[key] = val |
200 |
# should not collide |
|
201 |
args.update(query_args) |
|
202 |
return args |
|
203 |
return query_args |
|
204 |
||
205 |
def process_result(self, cursor): |
|
206 |
"""return a list of CubicWeb compliant values from data in the given cursor |
|
207 |
""" |
|
208 |
descr = cursor.description |
|
209 |
encoding = self.encoding |
|
210 |
process_value = self.dbapi_module.process_value |
|
211 |
binary = Binary |
|
212 |
results = cursor.fetchall() |
|
213 |
for i, line in enumerate(results): |
|
214 |
result = [] |
|
215 |
for col, value in enumerate(line): |
|
216 |
if value is None: |
|
217 |
result.append(value) |
|
218 |
continue |
|
219 |
result.append(process_value(value, descr[col], encoding, binary)) |
|
220 |
results[i] = result |
|
221 |
return results |
|
222 |
||
223 |
||
224 |
def preprocess_entity(self, entity): |
|
225 |
"""return a dictionary to use as extra argument to cursor.execute |
|
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226 |
to insert/update an entity into a SQL database |
0 | 227 |
""" |
228 |
attrs = {} |
|
229 |
eschema = entity.e_schema |
|
230 |
for attr, value in entity.items(): |
|
231 |
rschema = eschema.subject_relation(attr) |
|
232 |
if rschema.is_final(): |
|
233 |
atype = str(entity.e_schema.destination(attr)) |
|
234 |
if atype == 'Boolean': |
|
235 |
value = self.dbhelper.boolean_value(value) |
|
236 |
elif atype == 'Password': |
|
237 |
# if value is a Binary instance, this mean we got it |
|
238 |
# from a query result and so it is already encrypted |
|
239 |
if isinstance(value, Binary): |
|
240 |
value = value.getvalue() |
|
241 |
else: |
|
242 |
value = crypt_password(value) |
|
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|
243 |
# XXX needed for sqlite but I don't think it is for other backends |
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|
244 |
elif atype == 'Datetime' and isinstance(value, date): |
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245 |
value = todatetime(value) |
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|
246 |
elif atype == 'Date' and isinstance(value, datetime): |
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247 |
value = todate(value) |
0 | 248 |
elif isinstance(value, Binary): |
249 |
value = self.binary(value.getvalue()) |
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6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
250 |
# XXX <3.2 bw compat |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
251 |
elif type(value) is DateTimeType: |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
252 |
warn('found mx date time instance, please update to use datetime', |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
253 |
DeprecationWarning) |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
254 |
value = datetime(value.year, value.month, value.day, |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
255 |
value.hour, value.minute, int(value.second)) |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
256 |
elif type(value) is DateTimeDeltaType: |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
257 |
warn('found mx date time instance, please update to use datetime', |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
258 |
DeprecationWarning) |
6bf19f175ea5
mx.DateTime fixes
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
1263
diff
changeset
|
259 |
value = timedelta(0, int(value.seconds), 0) |
1251
af40e615dc89
introduce a 'cw_' prefix on entity table and column names so we don't conflict with sql or DBMS specific keywords
sylvain.thenault@logilab.fr
parents:
0
diff
changeset
|
260 |
attrs[SQL_PREFIX+str(attr)] = value |
0 | 261 |
return attrs |
262 |
||
263 |
||
264 |
from logging import getLogger |
|
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from cubicweb import set_log_methods |
|
266 |
set_log_methods(SQLAdapterMixIn, getLogger('cubicweb.sqladapter')) |
|
267 |
||
268 |
def init_sqlite_connexion(cnx): |
|
269 |
# XXX should not be publicly exposed |
|
270 |
#def comma_join(strings): |
|
271 |
# return ', '.join(strings) |
|
272 |
#cnx.create_function("COMMA_JOIN", 1, comma_join) |
|
273 |
||
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class concat_strings(object): |
|
275 |
def __init__(self): |
|
276 |
self.values = [] |
|
277 |
def step(self, value): |
|
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if value is not None: |
|
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self.values.append(value) |
|
280 |
def finalize(self): |
|
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return ', '.join(self.values) |
|
282 |
# renamed to GROUP_CONCAT in cubicweb 2.45, keep old name for bw compat for |
|
283 |
# some time |
|
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cnx.create_aggregate("CONCAT_STRINGS", 1, concat_strings) |
|
285 |
cnx.create_aggregate("GROUP_CONCAT", 1, concat_strings) |
|
1619
e4845b54a704
force proper date/datetime according to type (necessary for sqlite at least)
sylvain.thenault@logilab.fr
parents:
1408
diff
changeset
|
286 |
|
0 | 287 |
def _limit_size(text, maxsize, format='text/plain'): |
288 |
if len(text) < maxsize: |
|
289 |
return text |
|
290 |
if format in ('text/html', 'text/xhtml', 'text/xml'): |
|
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text = remove_html_tags(text) |
|
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if len(text) > maxsize: |
|
293 |
text = text[:maxsize] + '...' |
|
294 |
return text |
|
295 |
||
296 |
def limit_size3(text, format, maxsize): |
|
297 |
return _limit_size(text, maxsize, format) |
|
298 |
cnx.create_function("LIMIT_SIZE", 3, limit_size3) |
|
299 |
||
300 |
def limit_size2(text, maxsize): |
|
301 |
return _limit_size(text, maxsize) |
|
302 |
cnx.create_function("TEXT_LIMIT_SIZE", 2, limit_size2) |
|
303 |
import yams.constraints |
|
304 |
if hasattr(yams.constraints, 'patch_sqlite_decimal'): |
|
305 |
yams.constraints.patch_sqlite_decimal() |
|
306 |
||
307 |
||
308 |
sqlite_hooks = SQL_CONNECT_HOOKS.setdefault('sqlite', []) |
|
309 |
sqlite_hooks.append(init_sqlite_connexion) |
|
310 |
||
311 |
def init_cnx(driver, cnx): |
|
312 |
for hook in SQL_CONNECT_HOOKS.get(driver, ()): |
|
313 |
hook(cnx) |