author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Wed, 24 Mar 2010 15:09:21 +0100 | |
branch | stable |
changeset 4996 | 45ce27d538a1 |
parent 4212 | ab6573088b4a |
child 5421 | 8167de96c523 |
permissions | -rw-r--r-- |
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"""extends yams to be able to load google appengine's schemas |
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MISSING FEATURES: |
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- ListProperty, StringList, EmailProperty, etc. (XXX) |
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- ReferenceProperty.verbose_name, collection_name, etc. (XXX) |
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XXX proprify this knowing we'll use goa.db |
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:organization: Logilab |
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update copyright: welcome 2010
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:copyright: 2008-2010 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 os.path import join |
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from datetime import datetime, date, time |
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from google.appengine.ext import db |
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from google.appengine.api import datastore_types |
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from yams.buildobjs import (String, Int, Float, Boolean, Date, Time, Datetime, |
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Bytes, SubjectRelation) |
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from yams.buildobjs import metadefinition, EntityType |
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from cubicweb.schema import CubicWebSchemaLoader |
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from cubicweb.goa import db as goadb |
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# db.Model -> yams ############################################################ |
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DBM2Y_TYPESMAP = { |
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basestring: String, |
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datastore_types.Text: String, |
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int: Int, |
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float: Float, |
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bool: Boolean, |
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time: Time, |
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date: Date, |
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datetime: Datetime, |
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datastore_types.Blob: Bytes, |
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} |
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def dbm2y_default_factory(prop, **kwargs): |
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"""just wraps the default types map to set |
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basic constraints like `required`, `default`, etc. |
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""" |
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yamstype = DBM2Y_TYPESMAP[prop.data_type] |
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if 'default' not in kwargs: |
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default = prop.default_value() |
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if default is not None: |
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kwargs['default'] = default |
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if prop.required: |
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kwargs['required'] = True |
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return yamstype(**kwargs) |
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def dbm2y_string_factory(prop): |
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"""like dbm2y_default_factory but also deals with `maxsize` and `vocabulary`""" |
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kwargs = {} |
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if prop.data_type is basestring: |
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kwargs['maxsize'] = 500 |
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if prop.choices is not None: |
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kwargs['vocabulary'] = prop.choices |
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return dbm2y_default_factory(prop, **kwargs) |
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def dbm2y_date_factory(prop): |
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"""like dbm2y_default_factory but also deals with today / now definition""" |
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kwargs = {} |
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if prop.auto_now_add: |
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if prop.data_type is datetime: |
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kwargs['default'] = 'now' |
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else: |
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kwargs['default'] = 'today' |
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# XXX no equivalent to Django's `auto_now` |
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return dbm2y_default_factory(prop, **kwargs) |
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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def dbm2y_relation_factory(etype, prop, multiple=False): |
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"""called if `prop` is a `db.ReferenceProperty`""" |
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if multiple: |
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cardinality = '**' |
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elif prop.required: |
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cardinality = '1*' |
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else: |
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cardinality = '?*' |
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# XXX deal with potential kwargs of ReferenceProperty.__init__() |
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try: |
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return SubjectRelation(prop.data_type.kind(), cardinality=cardinality) |
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except AttributeError, ex: |
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# hack, data_type is still _SELF_REFERENCE_MARKER |
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return SubjectRelation(etype, cardinality=cardinality) |
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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changeset
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d628defebc17
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parents:
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DBM2Y_FACTORY = { |
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basestring: dbm2y_string_factory, |
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datastore_types.Text: dbm2y_string_factory, |
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int: dbm2y_default_factory, |
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float: dbm2y_default_factory, |
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bool: dbm2y_default_factory, |
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time: dbm2y_date_factory, |
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date: dbm2y_date_factory, |
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datetime: dbm2y_date_factory, |
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datastore_types.Blob: dbm2y_default_factory, |
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} |
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class GaeSchemaLoader(CubicWebSchemaLoader): |
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"""Google appengine schema loader class""" |
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def __init__(self, *args, **kwargs): |
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self.use_gauthservice = kwargs.pop('use_gauthservice', False) |
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super(GaeSchemaLoader, self).__init__(*args, **kwargs) |
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self.defined = {} |
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self.created = [] |
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self.loaded_files = [] |
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self._instantiate_handlers() |
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parents:
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def finalize(self, register_base_types=False): |
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return self._build_schema('google-appengine', register_base_types) |
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def load_dbmodel(self, name, props): |
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clsdict = {} |
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ordered_props = sorted(props.items(), |
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key=lambda x: x[1].creation_counter) |
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for pname, prop in ordered_props: |
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if isinstance(prop, db.ListProperty): |
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if not issubclass(prop.item_type, db.Model): |
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self.error('ignoring list property with %s item type' |
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% prop.item_type) |
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continue |
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rdef = dbm2y_relation_factory(name, prop, multiple=True) |
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else: |
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try: |
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if isinstance(prop, (db.ReferenceProperty, |
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goadb.ReferencePropertyStub)): |
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rdef = dbm2y_relation_factory(name, prop) |
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else: |
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rdef = DBM2Y_FACTORY[prop.data_type](prop) |
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except KeyError, ex: |
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import traceback |
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traceback.print_exc() |
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self.error('ignoring property %s (keyerror on %s)' % (pname, ex)) |
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continue |
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rdef.creation_rank = prop.creation_counter |
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clsdict[pname] = rdef |
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edef = metadefinition(name, (EntityType,), clsdict) |
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self.add_definition(self, edef()) |
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def error(self, msg): |
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print 'ERROR:', msg |
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def import_yams_schema(self, ertype, schemamod): |
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erdef = self.pyreader.import_erschema(ertype, schemamod) |
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def import_yams_cube_schema(self, templpath): |
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for filepath in self.get_schema_files(templpath): |
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self.handle_file(filepath) |
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1802
d628defebc17
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
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@property |
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def pyreader(self): |
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return self._live_handlers['.py'] |
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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import os |
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from cubicweb import CW_SOFTWARE_ROOT |
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def load_schema(config, schemaclasses=None, extrahook=None): |
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parents:
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"""high level method to load all the schema for a lax instance""" |
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# IMPORTANT NOTE: dbmodel schemas must be imported **BEFORE** |
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# the loader is instantiated because this is where the dbmodels |
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# are registered in the yams schema |
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for compname in config['included-cubes']: |
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__import__('%s.schema' % compname) |
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loader = GaeSchemaLoader(use_gauthservice=config['use-google-auth'], db=db) |
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if schemaclasses is not None: |
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for cls in schemaclasses: |
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loader.load_dbmodel(cls.__name__, goadb.extract_dbmodel(cls)) |
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elif config['schema-type'] == 'dbmodel': |
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import schema as appschema |
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for obj in vars(appschema).values(): |
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if isinstance(obj, type) and issubclass(obj, goadb.Model) and obj.__module__ == appschema.__name__: |
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loader.load_dbmodel(obj.__name__, goadb.extract_dbmodel(obj)) |
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for erschema in ('CWGroup', 'CWEType', 'CWRType', 'RQLExpression', |
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'is_', 'is_instance_of', |
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'read_permission', 'add_permission', |
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'delete_permission', 'update_permission'): |
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
changeset
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loader.import_yams_schema(erschema, 'bootstrap') |
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to make cw schemas importable, they have to be installed w/ cw code, not in /usr/share/cubicweb/schemas
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
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loader.handle_file(join(CW_SOFTWARE_ROOT, 'schemas', 'base.py')) |
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cubes = config['included-yams-cubes'] |
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for cube in reversed(config.expand_cubes(cubes)): |
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config.info('loading cube %s', cube) |
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loader.import_yams_cube_schema(config.cube_dir(cube)) |
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if config['schema-type'] == 'yams': |
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loader.import_yams_cube_schema('.') |
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if extrahook is not None: |
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extrahook(loader) |
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if config['use-google-auth']: |
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loader.defined['CWUser'].remove_relation('upassword') |
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loader.defined['CWUser'].permissions['add'] = () |
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parents:
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loader.defined['CWUser'].permissions['delete'] = () |
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parents:
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for etype in ('CWGroup', 'RQLExpression'): |
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read_perm_rel = loader.defined[etype].get_relations('read_permission').next() |
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read_perm_rel.cardinality = '**' |
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parents:
1133
diff
changeset
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# XXX not yet ready for CWUser workflow |
5fe84a5f7035
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parents:
1133
diff
changeset
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loader.defined['CWUser'].remove_relation('in_state') |
5fe84a5f7035
rename internal entity types to have CW prefix instead of E
sylvain.thenault@logilab.fr
parents:
1133
diff
changeset
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202 |
loader.defined['CWUser'].remove_relation('wf_info_for') |
5fe84a5f7035
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parents:
1133
diff
changeset
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# remove RQLConstraint('NOT O name "owners"') on CWUser in_group CWGroup |
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# since "owners" group is not persistent with gae |
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parents:
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diff
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loader.defined['CWUser'].get_relations('in_group').next().constraints = [] |
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# return the full schema including the cubes' schema |
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for ertype in loader.defined.values(): |
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if getattr(ertype, 'inlined', False): |
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ertype.inlined = False |
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return loader.finalize() |