How does iRODSMetaCollection object have no get attribute?

[tanmayagrawal21]

{"ansible_loop_var": "item", "changed": false, "item": "/testing/trash/home/shared", "msg": "An unexpected exception of type AttributeError occurred. Arguments: (\"'iRODSMetaCollection' object has no attribute 'get'\",)"}

Source Python

    elif entity_type == "collection":
        try:
            return session.collections.get(entity_name)
        except CollectionDoesNotExist as e:
            raise _IrodsAvuError(
                "The collection '{0}' does not exist".format(entity_name))

Despite it being one of the stated functionalities:
https://github.com/irods/python-irodsclient/blob/main/irods/test/collection_test.py

[alanking]

iRODSMetaCollection does not appear to have a get attribute:

python-irodsclient/irods/meta.py

Lines 77 to 209 in e982023

	class iRODSMetaCollection(object):
	def __call__(self, admin = False, timestamps = False, **opts):
	x = copy.copy(self)
	x._manager = (x._manager)(admin, timestamps, **opts)
	x._reset_metadata()
	return x
	def __init__(self, manager, model_cls, path):
	self._manager = manager
	self._model_cls = model_cls
	self._path = path
	self._reset_metadata()
	def _reset_metadata(self):
	self._meta = self._manager.get(self._model_cls, self._path)
	def get_all(self, key):
	"""
	Returns a list of iRODSMeta associated with a given key
	"""
	if six.PY2:
	if isinstance(key, unicode):
	key = key.encode('utf8')
	else:
	if isinstance(key, bytes):
	key = key.decode('utf8')
	if not isinstance(key, str):
	raise TypeError
	return [m for m in self._meta if m.name == key]
	def get_one(self, key):
	"""
	Returns the iRODSMeta defined for a key. If there are none,
	or if there are more than one defined, raises KeyError
	"""
	values = self.get_all(key)
	if not values:
	raise KeyError
	if len(values) > 1:
	raise KeyError
	return values[0]
	def _get_meta(self, *args):
	if not len(args):
	raise ValueError(
	"Must specify an iRODSMeta object or key, value, units)")
	return args[0] if len(args) == 1 else iRODSMeta(*args)
	def apply_atomic_operations(self, *avu_ops):
	self._manager.apply_atomic_operations(self._model_cls, self._path, *avu_ops)
	self._reset_metadata()
	def set(self, *args, **opts):
	"""
	Set as iRODSMeta to a key
	"""
	meta = self._get_meta(*args)
	self._manager.set(self._model_cls, self._path, meta, **opts)
	self._reset_metadata()
	def add(self, *args, **opts):
	"""
	Add as iRODSMeta to a key
	"""
	meta = self._get_meta(*args)
	self._manager.add(self._model_cls, self._path, meta, **opts)
	self._reset_metadata()
	def remove(self, *args, **opts):
	"""
	Removes an iRODSMeta
	"""
	meta = self._get_meta(*args)
	self._manager.remove(self._model_cls, self._path, meta, **opts)
	self._reset_metadata()
	def items(self):
	"""
	Returns a list of iRODSMeta
	"""
	return self._meta
	def keys(self):
	"""
	Return a list of keys. Duplicates preserved
	"""
	return [m.name for m in self._meta]
	def __len__(self):
	return len(self._meta)
	def __getitem__(self, key):
	"""
	Returns the first iRODSMeta defined on key. Order is
	undefined. Use get_one() or get_all() instead
	"""
	values = self.get_all(key)
	if not values:
	raise KeyError
	return values[0]
	def __setitem__(self, key, meta):
	"""
	Deletes all existing values associated with a given key and associates
	the key with a single iRODSMeta tuple
	"""
	self._delete_all_values(key)
	self.add(meta)
	def _delete_all_values(self, key):
	for meta in self.get_all(key):
	self.remove(meta)
	def __delitem__(self, key):
	"""
	Deletes all existing values associated with a given key
	"""
	if not isinstance(key, str):
	raise TypeError
	self._delete_all_values(key)
	self._reset_metadata()
	def __contains__(self, key):
	if not isinstance(key, str):
	raise TypeError
	values = self.get_all(key)
	return len(values) > 0
	def remove_all(self, **opts):
	for meta in self._meta:
	self._manager.remove(self._model_cls, self._path, meta, **opts)
	self._reset_metadata()

Are you looking for get_all or get_one?

[d-w-moore]

Note get_all retrieves all AVUs associated with a certain key (passed as the argument).
But, there's also the items method, which does actually fetches all metadata associated with the object. So you could say the get attribute is there, just ... misnamed.

[trel]

Cause for an alias? Or would that make matters worse?

[d-w-moore]

Cause for an alias? Or would that make matters worse?

I don't think it would hurt, and we've renamed a few things in the PRC already.

[korydraughn]

Is there an iRODSMetaDataObject class we can compare to? I didn't see one, which seems a little weird.

I noticed __getitem__ on iRODSMetaCollection which allows fetching info using the subscript operator.

@tanmayagrawal21 Where is it stated that the class supports .get? I didn't see it in the link you posted.