Gecko [ biogenelab.eu ]

Name	Size	Permission
__init__.py	7.79 KB	-rw-r--r--
__init__.pyc	9.05 KB	-rw-r--r--
attributes.py	54.22 KB	-rw-r--r--
attributes.pyc	52.92 KB	-rw-r--r--
base.py	12.91 KB	-rw-r--r--
base.pyc	13.01 KB	-rw-r--r--
collections.py	52.03 KB	-rw-r--r--
collections.pyc	59.75 KB	-rw-r--r--
dependency.py	44.99 KB	-rw-r--r--
dependency.pyc	27.71 KB	-rw-r--r--
deprecated_interfaces.py	21.43 KB	-rw-r--r--
deprecated_interfaces.pyc	24.62 KB	-rw-r--r--
descriptor_props.py	23.88 KB	-rw-r--r--
descriptor_props.pyc	26.52 KB	-rw-r--r--
dynamic.py	13.03 KB	-rw-r--r--
dynamic.pyc	14.09 KB	-rw-r--r--
evaluator.py	4.91 KB	-rw-r--r--
evaluator.pyc	6.99 KB	-rw-r--r--
events.py	68.96 KB	-rw-r--r--
events.pyc	74.7 KB	-rw-r--r--
exc.py	5.31 KB	-rw-r--r--
exc.pyc	7.46 KB	-rw-r--r--
identity.py	6.92 KB	-rw-r--r--
identity.pyc	10.32 KB	-rw-r--r--
instrumentation.py	16.39 KB	-rw-r--r--
instrumentation.pyc	18.85 KB	-rw-r--r--
interfaces.py	18.54 KB	-rw-r--r--
interfaces.pyc	22.92 KB	-rw-r--r--
loading.py	20.76 KB	-rw-r--r--
loading.pyc	13.17 KB	-rw-r--r--
mapper.py	105.8 KB	-rw-r--r--
mapper.pyc	79.27 KB	-rw-r--r--
path_registry.py	7.49 KB	-rw-r--r--
path_registry.pyc	11.72 KB	-rw-r--r--
persistence.py	39.9 KB	-rw-r--r--
persistence.pyc	30.86 KB	-rw-r--r--
properties.py	9.33 KB	-rw-r--r--
properties.pyc	10.22 KB	-rw-r--r--
query.py	128.55 KB	-rw-r--r--
query.pyc	119.57 KB	-rw-r--r--
relationships.py	108.5 KB	-rw-r--r--
relationships.pyc	93.61 KB	-rw-r--r--
scoping.py	5.96 KB	-rw-r--r--
scoping.pyc	7.22 KB	-rw-r--r--
session.py	93.63 KB	-rw-r--r--
session.pyc	87.9 KB	-rw-r--r--
state.py	20.52 KB	-rw-r--r--
state.pyc	23.98 KB	-rw-r--r--
strategies.py	53.02 KB	-rw-r--r--
strategies.pyc	40.73 KB	-rw-r--r--
strategy_options.py	31.42 KB	-rw-r--r--
strategy_options.pyc	32.5 KB	-rw-r--r--
sync.py	4.63 KB	-rw-r--r--
sync.pyc	3.87 KB	-rw-r--r--
unitofwork.py	22.69 KB	-rw-r--r--
unitofwork.pyc	22.02 KB	-rw-r--r--
util.py	34.86 KB	-rw-r--r--
util.pyc	35.23 KB	-rw-r--r--

Code Editor : dynamic.py

# orm/dynamic.py
# Copyright (C) 2005-2014 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php

"""Dynamic collection API.

Dynamic collections act like Query() objects for read operations and support
basic add/delete mutation.

"""

from .. import log, util, exc
from ..sql import operators
from . import (
    attributes, object_session, util as orm_util, strategies,
    object_mapper, exc as orm_exc, properties
)
from .query import Query

@log.class_logger
@properties.RelationshipProperty.strategy_for(lazy="dynamic")
class DynaLoader(strategies.AbstractRelationshipLoader):
    def init_class_attribute(self, mapper):
        self.is_class_level = True
        if not self.uselist:
            raise exc.InvalidRequestError(
                "On relationship %s, 'dynamic' loaders cannot be used with "
                "many-to-one/one-to-one relationships and/or "
                "uselist=False." % self.parent_property)
        strategies._register_attribute(
            self,
            mapper,
            useobject=True,
            uselist=True,
            impl_class=DynamicAttributeImpl,
            target_mapper=self.parent_property.mapper,
            order_by=self.parent_property.order_by,
            query_class=self.parent_property.query_class,
            backref=self.parent_property.back_populates,
        )

class DynamicAttributeImpl(attributes.AttributeImpl):
    uses_objects = True
    accepts_scalar_loader = False
    supports_population = False
    collection = False

def __init__(self, class_, key, typecallable,
                 dispatch,
                 target_mapper, order_by, query_class=None, **kw):
        super(DynamicAttributeImpl, self).\
            __init__(class_, key, typecallable, dispatch, **kw)
        self.target_mapper = target_mapper
        self.order_by = order_by
        if not query_class:
            self.query_class = AppenderQuery
        elif AppenderMixin in query_class.mro():
            self.query_class = query_class
        else:
            self.query_class = mixin_user_query(query_class)

def get(self, state, dict_, passive=attributes.PASSIVE_OFF):
        if not passive & attributes.SQL_OK:
            return self._get_collection_history(
                state, attributes.PASSIVE_NO_INITIALIZE).added_items
        else:
            return self.query_class(self, state)

def get_collection(self, state, dict_, user_data=None,
                       passive=attributes.PASSIVE_NO_INITIALIZE):
        if not passive & attributes.SQL_OK:
            return self._get_collection_history(state,
                                                passive).added_items
        else:
            history = self._get_collection_history(state, passive)
            return history.added_plus_unchanged

@util.memoized_property
    def _append_token(self):
        return attributes.Event(self, attributes.OP_APPEND)

@util.memoized_property
    def _remove_token(self):
        return attributes.Event(self, attributes.OP_REMOVE)

def fire_append_event(self, state, dict_, value, initiator,
                          collection_history=None):
        if collection_history is None:
            collection_history = self._modified_event(state, dict_)

collection_history.add_added(value)

for fn in self.dispatch.append:
            value = fn(state, value, initiator or self._append_token)

if self.trackparent and value is not None:
            self.sethasparent(attributes.instance_state(value), state, True)

def fire_remove_event(self, state, dict_, value, initiator,
                          collection_history=None):
        if collection_history is None:
            collection_history = self._modified_event(state, dict_)

collection_history.add_removed(value)

if self.trackparent and value is not None:
            self.sethasparent(attributes.instance_state(value), state, False)

for fn in self.dispatch.remove:
            fn(state, value, initiator or self._remove_token)

def _modified_event(self, state, dict_):

if self.key not in state.committed_state:
            state.committed_state[self.key] = CollectionHistory(self, state)

state._modified_event(dict_,
                              self,
                              attributes.NEVER_SET)

# this is a hack to allow the fixtures.ComparableEntity fixture
        # to work
        dict_[self.key] = True
        return state.committed_state[self.key]

def set(self, state, dict_, value, initiator,
            passive=attributes.PASSIVE_OFF,
            check_old=None, pop=False):
        if initiator and initiator.parent_token is self.parent_token:
            return

if pop and value is None:
            return
        self._set_iterable(state, dict_, value)

def _set_iterable(self, state, dict_, iterable, adapter=None):
        new_values = list(iterable)
        if state.has_identity:
            old_collection = util.IdentitySet(self.get(state, dict_))

collection_history = self._modified_event(state, dict_)
        if not state.has_identity:
            old_collection = collection_history.added_items
        else:
            old_collection = old_collection.union(
                collection_history.added_items)

idset = util.IdentitySet
        constants = old_collection.intersection(new_values)
        additions = idset(new_values).difference(constants)
        removals = old_collection.difference(constants)

for member in new_values:
            if member in additions:
                self.fire_append_event(state, dict_, member, None,
                                       collection_history=collection_history)

for member in removals:
            self.fire_remove_event(state, dict_, member, None,
                                   collection_history=collection_history)

def delete(self, *args, **kwargs):
        raise NotImplementedError()

def set_committed_value(self, state, dict_, value):
        raise NotImplementedError("Dynamic attributes don't support "
                                  "collection population.")

def get_history(self, state, dict_, passive=attributes.PASSIVE_OFF):
        c = self._get_collection_history(state, passive)
        return c.as_history()

def get_all_pending(self, state, dict_,
                        passive=attributes.PASSIVE_NO_INITIALIZE):
        c = self._get_collection_history(
            state, passive)
        return [
            (attributes.instance_state(x), x)
            for x in
            c.all_items
        ]

def _get_collection_history(self, state, passive=attributes.PASSIVE_OFF):
        if self.key in state.committed_state:
            c = state.committed_state[self.key]
        else:
            c = CollectionHistory(self, state)

if state.has_identity and (passive & attributes.INIT_OK):
            return CollectionHistory(self, state, apply_to=c)
        else:
            return c

def append(self, state, dict_, value, initiator,
               passive=attributes.PASSIVE_OFF):
        if initiator is not self:
            self.fire_append_event(state, dict_, value, initiator)

def remove(self, state, dict_, value, initiator,
               passive=attributes.PASSIVE_OFF):
        if initiator is not self:
            self.fire_remove_event(state, dict_, value, initiator)

def pop(self, state, dict_, value, initiator,
            passive=attributes.PASSIVE_OFF):
        self.remove(state, dict_, value, initiator, passive=passive)

class AppenderMixin(object):
    query_class = None

def __init__(self, attr, state):
        super(AppenderMixin, self).__init__(attr.target_mapper, None)
        self.instance = instance = state.obj()
        self.attr = attr

mapper = object_mapper(instance)
        prop = mapper._props[self.attr.key]
        self._criterion = prop.compare(
            operators.eq,
            instance,
            value_is_parent=True,
            alias_secondary=False)

if self.attr.order_by:
            self._order_by = self.attr.order_by

def session(self):
        sess = object_session(self.instance)
        if sess is not None and self.autoflush and sess.autoflush \
                and self.instance in sess:
            sess.flush()
        if not orm_util.has_identity(self.instance):
            return None
        else:
            return sess
    session = property(session, lambda s, x: None)

def __iter__(self):
        sess = self.session
        if sess is None:
            return iter(self.attr._get_collection_history(
                attributes.instance_state(self.instance),
                attributes.PASSIVE_NO_INITIALIZE).added_items)
        else:
            return iter(self._clone(sess))

def __getitem__(self, index):
        sess = self.session
        if sess is None:
            return self.attr._get_collection_history(
                attributes.instance_state(self.instance),
                attributes.PASSIVE_NO_INITIALIZE).indexed(index)
        else:
            return self._clone(sess).__getitem__(index)

def count(self):
        sess = self.session
        if sess is None:
            return len(self.attr._get_collection_history(
                attributes.instance_state(self.instance),
                attributes.PASSIVE_NO_INITIALIZE).added_items)
        else:
            return self._clone(sess).count()

def _clone(self, sess=None):
        # note we're returning an entirely new Query class instance
        # here without any assignment capabilities; the class of this
        # query is determined by the session.
        instance = self.instance
        if sess is None:
            sess = object_session(instance)
            if sess is None:
                raise orm_exc.DetachedInstanceError(
                    "Parent instance %s is not bound to a Session, and no "
                    "contextual session is established; lazy load operation "
                    "of attribute '%s' cannot proceed" % (
                        orm_util.instance_str(instance), self.attr.key))

if self.query_class:
            query = self.query_class(self.attr.target_mapper, session=sess)
        else:
            query = sess.query(self.attr.target_mapper)

query._criterion = self._criterion
        query._order_by = self._order_by

return query

def extend(self, iterator):
        for item in iterator:
            self.attr.append(
                attributes.instance_state(self.instance),
                attributes.instance_dict(self.instance), item, None)

def append(self, item):
        self.attr.append(
            attributes.instance_state(self.instance),
            attributes.instance_dict(self.instance), item, None)

def remove(self, item):
        self.attr.remove(
            attributes.instance_state(self.instance),
            attributes.instance_dict(self.instance), item, None)

class AppenderQuery(AppenderMixin, Query):
    """A dynamic query that supports basic collection storage operations."""

def mixin_user_query(cls):
    """Return a new class with AppenderQuery functionality layered over."""
    name = 'Appender' + cls.__name__
    return type(name, (AppenderMixin, cls), {'query_class': cls})

class CollectionHistory(object):
    """Overrides AttributeHistory to receive append/remove events directly."""

def __init__(self, attr, state, apply_to=None):
        if apply_to:
            coll = AppenderQuery(attr, state).autoflush(False)
            self.unchanged_items = util.OrderedIdentitySet(coll)
            self.added_items = apply_to.added_items
            self.deleted_items = apply_to.deleted_items
            self._reconcile_collection = True
        else:
            self.deleted_items = util.OrderedIdentitySet()
            self.added_items = util.OrderedIdentitySet()
            self.unchanged_items = util.OrderedIdentitySet()
            self._reconcile_collection = False

@property
    def added_plus_unchanged(self):
        return list(self.added_items.union(self.unchanged_items))

@property
    def all_items(self):
        return list(self.added_items.union(
            self.unchanged_items).union(self.deleted_items))

def as_history(self):
        if self._reconcile_collection:
            added = self.added_items.difference(self.unchanged_items)
            deleted = self.deleted_items.intersection(self.unchanged_items)
            unchanged = self.unchanged_items.difference(deleted)
        else:
            added, unchanged, deleted = self.added_items,\
                self.unchanged_items,\
                self.deleted_items
        return attributes.History(
            list(added),
            list(unchanged),
            list(deleted),
        )

def indexed(self, index):
        return list(self.added_items)[index]

def add_added(self, value):
        self.added_items.add(value)

def add_removed(self, value):
        if value in self.added_items:
            self.added_items.remove(value)
        else:
            self.deleted_items.add(value)

${this.title}

Code Editor : dynamic.py