def setUp(self):
def values_source():
return ["1st_obj", "2nd_obj"], ["1st_uriref", "2nd_uriref"]
self.store = MockStore()
self.value = LazyResourceLoader(values_source,
MockResource(self.store), "some_name")
def test_get_one_exceptions():
"""
Test RessourceValue.one.
"""
def values_source():
return ["1st_obj", "2nd_obj"], ["1st_uriref", "2nd_uriref"]
instance = LazyResourceLoader(values_source, MockResource(), "some_name")
with pytest.raises(surf.exceptions.CardinalityException):
instance.get_one()
def test_get_one_exceptions():
"""
Test RessourceValue.one.
"""
def values_source():
return ["1st_obj", "2nd_obj"], ["1st_uriref", "2nd_uriref"]
instance = LazyResourceLoader(values_source, MockResource(), "some_name")
with pytest.raises(surf.exceptions.CardinalityException):
instance.get_one()
def __getattr__(self, attr_name):
""" Retrieve and cache attribute values.
If attribute name is not in the "ns_predicate" form, an
`AttributeError` will be raised.
This method has no impact on the *dirty* state of the object.
"""
predicate, direct = attr2rdf(attr_name)
if not predicate:
raise AttributeError('Not a predicate: %s' % attr_name)
# Prepare closure for lazy execution.
def prepare_getvalues_callable(resource, predicate, direct, retrieve):
""" Return callable that loads and returns values. """
def getvalues_callable():
""" Load and return values for this attribute. """
# Select triple dictionary for synchronization
rdf_dict = resource.__rdf_direct if direct else resource.__rdf_inverse
# Initial synchronization
if retrieve:
store = resource.session[resource.store_key]
# send request to triple store
values = store.get(resource, predicate, direct)
if not values:
predicate_values = rdf_dict.get(predicate, [])
values.update([(pred_val, [])
for pred_val in predicate_values])
# instantiate SuRF objects
surf_values = resource._lazy(values)
else:
surf_values = []
rdf_dict[predicate] = [
resource.to_rdf(value) for value in surf_values
]
return surf_values, rdf_dict[predicate]
return getvalues_callable
# If resource is fully loaded and we're still here (__getattr__), this must be an empty
# attribute, therefore there is no point in querying the triple store !
retrieve_values = (not self.__full_direct) if direct else (
not self.__full_inverse)
getvalues_callable = prepare_getvalues_callable(
self, predicate, direct, retrieve_values)
attr_value = LazyResourceLoader(getvalues_callable, self, attr_name)
# Not using self.__setattr__, that would trigger loading of attributes
# object.__setattr__(self, attr_name, attr_value)
super(Resource, self).__setattr__(attr_name, attr_value)
self.dirty = False
return attr_value
def store_value():
def values_source():
return ["1st_obj", "2nd_obj"], ["1st_uriref", "2nd_uriref"]
store = MockStore()
value = LazyResourceLoader(values_source, MockResource(store), "some_name")
return store, value
def setUp(self):
def values_source():
return ["1st_obj", "2nd_obj"], ["1st_uriref", "2nd_uriref"]
self.store = MockStore()
self.value = LazyResourceLoader(values_source, MockResource(self.store),
"some_name")
def test_contains(self):
""" Test LazyResourceLoader.__contains__. """
def values_source():
return ["value_as_surf_object"], ["value_as_uriref"]
instance = LazyResourceLoader(values_source, MockResource(),
"some_name")
# Test basic membership check.
self.assertTrue("value_as_surf_object" in instance)
# Test that "to_rdf" is tried.
self.assertTrue("value_as_uriref" in instance)
class TestResultValueQuery(unittest.TestCase):
def setUp(self):
def values_source():
return ["1st_obj", "2nd_obj"], ["1st_uriref", "2nd_uriref"]
self.store = MockStore()
self.value = LazyResourceLoader(values_source, MockResource(self.store),
"some_name")
def test_limit_offset(self):
""" Test limit, offset. """
self.store.expect_args({"limit" : 10, "offset" : 5})
list(self.value.limit(10).offset(5))
def test_full(self):
""" Test full(). """
self.store.expect_args({'full' : True, 'direct_only' : True})
list(self.value.full(direct_only = True))
def test_order_desc(self):
""" Test order, desc. """
self.store.expect_args({"order" : "some_attr", "desc" : True})
list(self.value.order("some_attr").desc())
def test_get_by(self):
""" Test get_by. """
expected = [(surf.ns.FOAF["name"], "Jane", True)]
self.store.expect_args({"get_by" : expected})
list(self.value.get_by(foaf_name = "Jane"))
def test_context(self):
""" Test context. """
self.store.expect_args({"context" : "my_context"})
list(self.value.context("my_context"))
def test_filter(self):
""" Test filter. """
self.store.expect_args({"filter" : [(surf.ns.FOAF["name"], "f", True)]})
list(self.value.filter(foaf_name = "f"))
def test_get_by_resource(self):
""" Test that get_by accepts Resources as values. """
resource = MockResource()
expected = [(surf.ns.FOAF["knows"], resource.subject, True)]
self.store.expect_args({"get_by" : expected})
list(self.value.get_by(foaf_knows = resource))
class TestResultValueQuery(unittest.TestCase):
def setUp(self):
def values_source():
return ["1st_obj", "2nd_obj"], ["1st_uriref", "2nd_uriref"]
self.store = MockStore()
self.value = LazyResourceLoader(values_source,
MockResource(self.store), "some_name")
def test_limit_offset(self):
""" Test limit, offset. """
self.store.expect_args({"limit": 10, "offset": 5})
list(self.value.limit(10).offset(5))
def test_full(self):
""" Test full(). """
self.store.expect_args({'full': True, 'direct_only': True})
list(self.value.full(direct_only=True))
def test_order_desc(self):
""" Test order, desc. """
self.store.expect_args({"order": "some_attr", "desc": True})
list(self.value.order("some_attr").desc())
def test_get_by(self):
""" Test get_by. """
expected = [(surf.ns.FOAF["name"], "Jane", True)]
self.store.expect_args({"get_by": expected})
list(self.value.get_by(foaf_name="Jane"))
def test_context(self):
""" Test context. """
self.store.expect_args({"context": "my_context"})
list(self.value.context("my_context"))
def test_filter(self):
""" Test filter. """
self.store.expect_args({"filter": [(surf.ns.FOAF["name"], "f", True)]})
list(self.value.filter(foaf_name="f"))
def test_get_by_resource(self):
""" Test that get_by accepts Resources as values. """
resource = MockResource()
expected = [(surf.ns.FOAF["knows"], resource.subject, True)]
self.store.expect_args({"get_by": expected})
list(self.value.get_by(foaf_knows=resource))
def __setattr__(self, name, value):
"""
The `set` method - responsible for *caching* the `value` to the
corresponding object attribute given by `name`.
.. note: This method sets the state of the resource to *dirty*
(the `resource` will be persisted if the `commit` `session` method
is called).
"""
def prepare_getvalues_callable(values, rdf_values):
""" Return callable that returns stored values for this attr. """
def getvalues_callable():
""" Return stored values for this attribute. """
return values, rdf_values
return getvalues_callable
predicate, direct = attr2rdf(name)
if predicate:
rdf_dict = direct and self.__rdf_direct or self.__rdf_inverse
if not isinstance(value, list):
value = [value]
rdf_dict[predicate] = []
rdf_dict[predicate].extend([self.to_rdf(val) for val in value])
self.dirty = True
if type(value) is LazyResourceLoader:
pass
else:
if type(value) not in [list, tuple]:
value = [value]
value = list(map(value_to_rdf, value))
getvalues_callable = prepare_getvalues_callable(
value, rdf_dict[predicate])
value = LazyResourceLoader(getvalues_callable, self, name)
object.__setattr__(self, name, value)
