goa/dbinit.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Thu, 17 Jun 2010 15:15:52 +0200
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permissions -rw-r--r--
backport stable
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# 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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"""some utility functions for datastore initialization.
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"""
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__docformat__ = "restructuredtext en"
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from google.appengine.api.datastore import Key, Entity, Put, Get, Query
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from google.appengine.api import datastore_errors
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_GROUP_CACHE = {} # XXX use memcache
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def _get_group(groupname):
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    try:
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        return _GROUP_CACHE[groupname]
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    except KeyError:
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        key = Key.from_path('CWGroup', 'key_' + groupname, parent=None)
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        try:
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            group = Get(key)
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        except datastore_errors.EntityNotFoundError:
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            raise Exception('can\'t find required group %s, is your instance '
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                            'correctly initialized (eg did you run the '
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                            'initialization script) ?' % groupname)
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        _GROUP_CACHE[groupname] = group
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        return group
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def create_user(login, password, groups):
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    """create a cubicweb user"""
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    from cubicweb.server.utils import crypt_password
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    user = Entity('CWUser', name=login)
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    user['s_login'] = unicode(login)
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    user['s_upassword'] = crypt_password(password)
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    set_user_groups(user, groups)
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    Put(user)
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    return user
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def create_groups():
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    """create initial cubicweb groups"""
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    for groupname in ('managers', 'users', 'guests'):
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        group = Entity('CWGroup', name='key_' + groupname)
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        group['s_name'] = unicode(groupname)
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        Put(group)
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        _GROUP_CACHE[groupname] = group
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def set_user_groups(user, groups):
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    """set user in the given groups (as string). The given user entity
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    (datastore.Entity) is not putted back to the repository, this is the caller
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    responsability.
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    """
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    groups = [_get_group(g) for g in groups]
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    user['s_in_group'] = [g.key() for g in groups] or None
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    for group in groups:
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        try:
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            group['o_in_group'].append(user.key())
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        except (KeyError, AttributeError):
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            group['o_in_group'] = [user.key()]
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        Put(group)
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def init_relations(gaeentity, eschema):
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    """set None for every subject relations which is not yet defined"""
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    for rschema in eschema.subject_relations():
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        if rschema in ('identity', 'has_text'):
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            continue
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        dsrelation = 's_' + rschema.type
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        if not dsrelation in gaeentity:
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            gaeentity[dsrelation] = None
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    for rschema in eschema.object_relations():
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        if rschema == 'identity':
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            continue
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        dsrelation = 'o_' + rschema.type
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        if not dsrelation in gaeentity:
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            gaeentity[dsrelation] = None
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0
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def fix_entities(schema):
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    for etype in ('CWUser', 'CWGroup'):
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        eschema = schema.eschema(etype)
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        for gaeentity in Query(etype).Run():
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            init_relations(gaeentity, eschema)
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            # XXX o_is on CWEType entity
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            gaeentity['s_is'] = Key.from_path('CWEType', 'key_' + etype, parent=None)
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            Put(gaeentity)
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def init_persistent_schema(ssession, schema):
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    execute = ssession.execute
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    rql = ('INSERT CWEType X: X name %(name)s, X description %(descr)s,'
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           'X final FALSE')
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    eschema = schema.eschema('CWEType')
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    execute(rql, {'name': u'CWEType', 'descr': unicode(eschema.description)})
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    for eschema in schema.entities():
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        if eschema.final or eschema == 'CWEType':
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            continue
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        execute(rql, {'name': unicode(eschema),
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                      'descr': unicode(eschema.description)})
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def insert_versions(ssession, config):
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    execute = ssession.execute
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    # insert versions
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    execute('INSERT CWProperty X: X pkey %(pk)s, X value%(v)s',
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            {'pk': u'system.version.cubicweb',
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             'v': unicode(config.cubicweb_version())})
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    for cube in config.cubes():
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        execute('INSERT CWProperty X: X pkey %(pk)s, X value%(v)s',
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                {'pk': u'system.version.%s' % cube,
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                 'v': unicode(config.cube_version(cube))})