server/__init__.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Fri, 23 Apr 2010 17:07:55 +0200
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"""Server subcube of cubicweb : defines objects used only on the server
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(repository) side
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This module contains functions to initialize a new repository.
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:organization: Logilab
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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from __future__ import with_statement
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__docformat__ = "restructuredtext en"
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import sys
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from os.path import join, exists
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from glob import glob
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from logilab.common.modutils import LazyObject
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from logilab.common.textutils import splitstrip
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from yams import BASE_GROUPS
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from cubicweb import CW_SOFTWARE_ROOT
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# server-side debugging #########################################################
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# server debugging flags. They may be combined using binary operators.
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DBG_NONE = 0  # no debug information
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DBG_RQL = 1   # rql execution information
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DBG_SQL = 2   # executed sql
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DBG_REPO = 4  # repository events
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DBG_MS = 8    # multi-sources
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DBG_MORE = 16 # more verbosity
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DBG_ALL = 1 + 2 + 4 + 8 + 16
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# current debug mode
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DEBUG = 0
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def set_debug(debugmode):
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    """change the repository debugging mode"""
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    global DEBUG
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    if not debugmode:
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        DEBUG = 0
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        return
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    if isinstance(debugmode, basestring):
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        for mode in splitstrip(debugmode, sep='|'):
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            DEBUG |= globals()[mode]
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    else:
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        DEBUG |= debugmode
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class debugged(object):
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    """repository debugging context manager / decorator
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    Can be used either as a context manager:
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    >>> with debugged(server.DBG_RQL | server.DBG_REPO):
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    ...     # some code in which you want to debug repository activity,
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    ...     # seing information about RQL being executed an repository events.
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    or as a function decorator:
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    >>> @debugged(server.DBG_RQL | server.DBG_REPO)
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    ... def some_function():
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    ...     # some code in which you want to debug repository activity,
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    ...     # seing information about RQL being executed an repository events
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    debug mode will be reseted at its original value when leaving the "with"
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    block or the decorated function
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    """
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    def __init__(self, debugmode):
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        self.debugmode = debugmode
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        self._clevel = None
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    def __enter__(self):
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        """enter with block"""
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        self._clevel = DEBUG
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        set_debug(self.debugmode)
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    def __exit__(self, exctype, exc, traceback):
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        """leave with block"""
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        set_debug(self._clevel)
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        return traceback is None
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    def __call__(self, func):
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        """decorate function"""
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        def wrapped(*args, **kwargs):
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            _clevel = DEBUG
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            set_debug(self.debugmode)
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            try:
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                return func(*args, **kwargs)
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            finally:
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                set_debug(self._clevel)
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        return wrapped
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# database initialization ######################################################
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def create_user(session, login, pwd, *groups):
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    # monkey patch this method if you want to customize admin/anon creation
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    # (that maybe necessary if you change CWUser's schema)
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    user = session.create_entity('CWUser', login=login, upassword=pwd)
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    for group in groups:
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        session.execute('SET U in_group G WHERE U eid %(u)s, G name %(group)s',
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                        {'u': user.eid, 'group': group})
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    return user
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def init_repository(config, interactive=True, drop=False, vreg=None):
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    """initialise a repository database by creating tables add filling them
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    with the minimal set of entities (ie at least the schema, base groups and
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    a initial user)
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    """
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parents:
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   112
    from cubicweb.dbapi import in_memory_cnx
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   113
    from cubicweb.server.repository import Repository
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   114
    from cubicweb.server.utils import manager_userpasswd
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   115
    from cubicweb.server.sqlutils import sqlexec, sqlschema, sqldropschema
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   116
    # configuration to avoid db schema loading and user'state checking
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   117
    # on connection
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   118
    config.creating = True
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   119
    config.consider_user_state = False
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   120
    config.set_language = False
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   121
    # only enable the system source at initialization time + admin which is not
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    # an actual source but contains initial manager account information
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   123
    config.enabled_sources = ('system', 'admin')
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    repo = Repository(config, vreg=vreg)
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   125
    assert len(repo.sources) == 1, repo.sources
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   126
    schema = repo.schema
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   127
    sourcescfg = config.sources()
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   128
    _title = '-> creating tables '
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   129
    print _title,
0
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   130
    source = sourcescfg['system']
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    driver = source['db-driver']
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    sqlcnx = repo.system_source.get_connection()
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   133
    sqlcursor = sqlcnx.cursor()
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   134
    execute = sqlcursor.execute
0
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   135
    if drop:
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   136
        dropsql = sqldropschema(schema, driver)
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        try:
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   138
            sqlexec(dropsql, execute)
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   139
        except Exception, ex:
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   140
            print '-> drop failed, skipped (%s).' % ex
0
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   141
            sqlcnx.rollback()
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   142
    # schema entities and relations tables
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   143
    # can't skip entities table even if system source doesn't support them,
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   144
    # they are used sometimes by generated sql. Keeping them empty is much
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   145
    # simpler than fixing this...
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diff changeset
   146
    schemasql = sqlschema(schema, driver)
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   147
    #skip_entities=[str(e) for e in schema.entities()
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diff changeset
   148
    #               if not repo.system_source.support_entity(str(e))])
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   149
    sqlexec(schemasql, execute, pbtitle=_title, delimiter=';;')
0
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   150
    sqlcursor.close()
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   151
    sqlcnx.commit()
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   152
    sqlcnx.close()
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   153
    session = repo.internal_session()
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    try:
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   155
        login = unicode(sourcescfg['admin']['login'])
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   156
        pwd = sourcescfg['admin']['password']
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   157
    except KeyError:
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   158
        if interactive:
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   159
            msg = 'enter login and password of the initial manager account'
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   160
            login, pwd = manager_userpasswd(msg=msg, confirm=True)
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   161
        else:
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   162
            login, pwd = unicode(source['db-user']), source['db-password']
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   163
    print '-> inserting default user and default groups.'
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e76bf303c6f2 [F server test] sort for test predictability
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parents: 2593
diff changeset
   164
    # sort for eid predicatability as expected in some server tests
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diff changeset
   165
    for group in sorted(BASE_GROUPS):
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diff changeset
   166
        session.execute('INSERT CWGroup X: X name %(name)s',
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   167
                        {'name': unicode(group)})
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diff changeset
   168
    create_user(session, login, pwd, 'managers')
0
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   169
    session.commit()
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   170
    # reloging using the admin user
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   171
    config._cubes = None # avoid assertion error
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   172
    repo, cnx = in_memory_cnx(config, login, password=pwd)
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diff changeset
   173
    # trigger vreg initialisation of entity classes
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diff changeset
   174
    config.cubicweb_appobject_path = set(('entities',))
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diff changeset
   175
    config.cube_appobject_path = set(('entities',))
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   176
    repo.vreg.set_schema(repo.schema)
0
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   177
    assert len(repo.sources) == 1, repo.sources
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   178
    handler = config.migration_handler(schema, interactive=False,
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   179
                                       cnx=cnx, repo=repo)
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   180
    # install additional driver specific sql files
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   181
    handler.install_custom_sql_scripts(join(CW_SOFTWARE_ROOT, 'schemas'), driver)
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   182
    for directory in reversed(config.cubes_path()):
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   183
        handler.install_custom_sql_scripts(join(directory, 'schema'), driver)
4759
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diff changeset
   184
    # serialize the schema
0
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   185
    initialize_schema(config, schema, handler)
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   186
    # yoo !
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   187
    cnx.commit()
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   188
    config.enabled_sources = None
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   189
    for uri, source_config in config.sources().items():
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   190
        if uri in ('admin', 'system'):
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   191
            # not an actual source or init_creating already called
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   192
            continue
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   193
        source = repo.get_source(uri, source_config)
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   194
        source.init_creating()
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   195
    cnx.commit()
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   196
    cnx.close()
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   197
    session.close()
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diff changeset
   198
    repo.shutdown()
0
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   199
    # restore initial configuration
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   200
    config.creating = False
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   201
    config.consider_user_state = True
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   202
    config.set_language = True
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1294a6bdf3bf application -> instance where it makes sense
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diff changeset
   203
    print '-> database for instance %s initialized.' % config.appid
0
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diff changeset
   204
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   205
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   206
def initialize_schema(config, schema, mhandler, event='create'):
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   207
    from cubicweb.server.schemaserial import serialize_schema
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b718626a0e60 move hooks activation control on session object, so we can have a per transaction control. Added a new `hooks_control` context manager for usual modification of hooks activation.
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diff changeset
   208
    from cubicweb.server.session import hooks_control
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diff changeset
   209
    session = mhandler.session
0
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   210
    paths = [p for p in config.cubes_path() + [config.apphome]
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   211
             if exists(join(p, 'migration'))]
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diff changeset
   212
    # deactivate every hooks but those responsible to set metadata
5090
8c39d2bf58fd [repo creation] removing existing entities of 'single' cardinality relatino should be considered as 'activeintegrity' hook. Also don't disable that category during repo creation to avoid pb such as two default workflows for one entity types
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diff changeset
   213
    # so, NO INTEGRITY CHECKS are done, to have quicker db creation.
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diff changeset
   214
    # Active integrity is kept else we may pb such as two default
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diff changeset
   215
    # workflows for one entity type.
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diff changeset
   216
    with hooks_control(session, session.HOOKS_DENY_ALL, 'metadata',
8c39d2bf58fd [repo creation] removing existing entities of 'single' cardinality relatino should be considered as 'activeintegrity' hook. Also don't disable that category during repo creation to avoid pb such as two default workflows for one entity types
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diff changeset
   217
                       'activeintegrity'):
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diff changeset
   218
        # execute cubicweb's pre<event> script
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diff changeset
   219
        mhandler.exec_event_script('pre%s' % event)
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diff changeset
   220
        # execute cubes pre<event> script if any
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parents: 4831
diff changeset
   221
        for path in reversed(paths):
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diff changeset
   222
            mhandler.exec_event_script('pre%s' % event, path)
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diff changeset
   223
        # enter instance'schema into the database
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diff changeset
   224
        session.set_pool()
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diff changeset
   225
        serialize_schema(session, schema)
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        # execute cubicweb's post<event> script
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        mhandler.exec_event_script('post%s' % event)
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        # execute cubes'post<event> script if any
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        for path in reversed(paths):
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            mhandler.exec_event_script('post%s' % event, path)
0
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# sqlite'stored procedures have to be registered at connection opening time
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from logilab.database import SQL_CONNECT_HOOKS
0
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# add to this set relations which should have their add security checking done
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# *BEFORE* adding the actual relation (done after by default)
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BEFORE_ADD_RELATIONS = set(('owned_by',))
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# add to this set relations which should have their add security checking done
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# *at COMMIT TIME* (done after by default)
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ON_COMMIT_ADD_RELATIONS = set(())
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# available sources registry
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SOURCE_TYPES = {'native': LazyObject('cubicweb.server.sources.native', 'NativeSQLSource'),
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                # XXX private sources installed by an external cube
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                'pyrorql': LazyObject('cubicweb.server.sources.pyrorql', 'PyroRQLSource'),
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                'ldapuser': LazyObject('cubicweb.server.sources.ldapuser', 'LDAPUserSource'),
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                }