db.py 文件源码

def Delete(keys, **kwargs):
    """
        Deletes one or more entities from the data store.

        :warning: Permanently deletes entities, use with care!

        Deletes the given entity or entities from the data store. You can only delete
        entities from your app. If there is an error, the function raises a
        subclass of :exc:`datastore_errors.Error`.

        :param keys: Key, str or list of keys or strings to be deleted.
        :type keys: Key | str | list of Key | list of str

        :param config: Optional configuration to use for this request. This must be specified\
        as a keyword argument.
        :type config: dict

        :raises: :exc:`TransactionFailedError`, if the deletion could not be committed.
    """
    if conf["viur.db.caching" ]>0:
        if isinstance( keys, datastore_types.Key ) or isinstance( keys, basestring ): #Just one:
            memcache.delete( str( keys ), namespace=__CacheKeyPrefix__, seconds=__cacheLockTime__  )
        elif isinstance( keys, list ):
            for key in keys:
                assert isinstance( key, datastore_types.Key ) or isinstance( key, basestring )
                memcache.delete( str( key ), namespace=__CacheKeyPrefix__, seconds=__cacheLockTime__  )
    return( datastore.Delete( keys, **kwargs ) )