예제 #1
0
    def _set_iterable(self, state, iterable, adapter=None):
        """Set a collection value from an iterable of state-bearers.

        ``adapter`` is an optional callable invoked with a CollectionAdapter
        and the iterable.  Should return an iterable of state-bearing
        instances suitable for appending via a CollectionAdapter.  Can be used
        for, e.g., adapting an incoming dictionary into an iterator of values
        rather than keys.

        """
        # pulling a new collection first so that an adaptation exception does
        # not trigger a lazy load of the old collection.
        new_collection, user_data = self._build_collection(state)
        if adapter:
            new_values = list(adapter(new_collection, iterable))
        else:
            new_values = list(iterable)

        old = self.get(state)

        # ignore re-assignment of the current collection, as happens
        # implicitly with in-place operators (foo.collection |= other)
        if old is iterable:
            return

        if self.key not in state.committed_state:
            state.committed_state[self.key] = self.copy(old)

        old_collection = self.get_collection(state, old)

        state.dict[self.key] = user_data
        state.modified = True

        collections.bulk_replace(new_values, old_collection, new_collection)
        old_collection.unlink(old)
예제 #2
0
    def _set_iterable(self, state, iterable, adapter=None):
        """Set a collection value from an iterable of state-bearers.

        ``adapter`` is an optional callable invoked with a CollectionAdapter
        and the iterable.  Should return an iterable of state-bearing
        instances suitable for appending via a CollectionAdapter.  Can be used
        for, e.g., adapting an incoming dictionary into an iterator of values
        rather than keys.

        """
        # pulling a new collection first so that an adaptation exception does
        # not trigger a lazy load of the old collection.
        new_collection, user_data = self._build_collection(state)
        if adapter:
            new_values = list(adapter(new_collection, iterable))
        else:
            new_values = list(iterable)

        old = self.get(state)

        # ignore re-assignment of the current collection, as happens
        # implicitly with in-place operators (foo.collection |= other)
        if old is iterable:
            return

        if self.key not in state.committed_state:
            state.committed_state[self.key] = self.copy(old)

        old_collection = self.get_collection(state, old)

        state.dict[self.key] = user_data
        state.modified = True

        collections.bulk_replace(new_values, old_collection, new_collection)
        old_collection.unlink(old)
예제 #3
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    def _set_iterable(self, state, dict_, iterable, adapter=None):
        """Set a collection value from an iterable of state-bearers.

        ``adapter`` is an optional callable invoked with a CollectionAdapter
        and the iterable.  Should return an iterable of state-bearing
        instances suitable for appending via a CollectionAdapter.  Can be used
        for, e.g., adapting an incoming dictionary into an iterator of values
        rather than keys.

        """
        # pulling a new collection first so that an adaptation exception does
        # not trigger a lazy load of the old collection.
        new_collection, user_data = self._initialize_collection(state)
        if adapter:
            new_values = list(adapter(new_collection, iterable))
        else:
            new_values = list(iterable)

        old = self.get(state, dict_, passive=PASSIVE_ONLY_PERSISTENT)
        if old is PASSIVE_NO_RESULT:
            old = self.initialize(state, dict_)
        elif old is iterable:
            # ignore re-assignment of the current collection, as happens
            # implicitly with in-place operators (foo.collection |= other)
            return

        # place a copy of "old" in state.committed_state
        state.modified_event(dict_, self, old, True)

        old_collection = getattr(old, '_sa_adapter')

        dict_[self.key] = user_data

        collections.bulk_replace(new_values, old_collection, new_collection)
        old_collection.unlink(old)
예제 #4
0
    def _set_iterable(self, state, dict_, iterable, adapter=None):
        """Set a collection value from an iterable of state-bearers.

        ``adapter`` is an optional callable invoked with a CollectionAdapter
        and the iterable.  Should return an iterable of state-bearing
        instances suitable for appending via a CollectionAdapter.  Can be used
        for, e.g., adapting an incoming dictionary into an iterator of values
        rather than keys.

        """
        # pulling a new collection first so that an adaptation exception does
        # not trigger a lazy load of the old collection.
        new_collection, user_data = self._initialize_collection(state)
        if adapter:
            new_values = list(adapter(new_collection, iterable))
        else:
            new_values = list(iterable)

        old = self.get(state, dict_, passive=PASSIVE_ONLY_PERSISTENT)
        if old is PASSIVE_NO_RESULT:
            old = self.initialize(state, dict_)
        elif old is iterable:
            # ignore re-assignment of the current collection, as happens
            # implicitly with in-place operators (foo.collection |= other)
            return

        # place a copy of "old" in state.committed_state
        state.modified_event(dict_, self, old, True)

        old_collection = getattr(old, '_sa_adapter')

        dict_[self.key] = user_data

        collections.bulk_replace(new_values, old_collection, new_collection)
        old_collection.unlink(old)
예제 #5
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 def _set_iterable(self, state, dict_, iterable, adapter=None):
     collection_history = self._modified_event(state, dict_)
     new_values = list(iterable)
     if state.has_identity:
         old_collection = list(self.get(state, dict_))
     else:
         old_collection = []
     collections.bulk_replace(
         new_values, DynCollectionAdapter(self, state, old_collection),
         DynCollectionAdapter(self, state, new_values))
예제 #6
0
파일: dynamic.py 프로젝트: dreamwave/rad
    def _set_iterable(self, state, dict_, iterable, adapter=None):

        collection_history = self._modified_event(state, dict_)
        new_values = list(iterable)

        if _state_has_identity(state):
            old_collection = list(self.get(state, dict_))
        else:
            old_collection = []

        collections.bulk_replace(new_values, DynCollectionAdapter(self, state, old_collection), DynCollectionAdapter(self, state, new_values))