def save(self, subj, node=None):
""" Save an object to a database node.
:param subj: the object to save
:param node: the database node to save to (if omitted, will re-save to
same node as previous save)
"""
if node is not None:
subj.__node__ = node
# naively copy properties from object to node
props = {}
for key, value in subj.__dict__.items():
if not key.startswith("_"):
props[key] = value
if hasattr(subj, "__node__"):
subj.__node__.set_properties(props)
query = CypherQuery(self.graph, "START a=node({A}) "
"MATCH (a)-[r]->(b) "
"DELETE r")
query.execute(A=subj.__node__._id)
else:
subj.__node__, = self.graph.create(props)
# write rels
if hasattr(subj, "__rel__"):
batch = WriteBatch(self.graph)
for rel_type, rels in subj.__rel__.items():
for rel_props, endpoint in rels:
end_node = self._get_node(endpoint)
if end_node not in self.graph:
raise ValueError(end_node)
batch.create((subj.__node__, rel_type, end_node, rel_props))
batch.run()
return subj
class TestIndexedRelationshipAddition(object):
@pytest.fixture(autouse=True)
def setup(self, graph):
try:
graph.legacy.delete_index(Relationship, "Friendships")
except LookupError:
pass
self.friendships = graph.legacy.get_or_create_index(
Relationship, "Friendships")
self.batch = LegacyWriteBatch(graph)
self.graph = graph
def test_can_add_single_relationship(self, graph):
alice, bob, ab = self.graph.create({"name": "Alice"}, {"name": "Bob"},
(0, "KNOWS", 1))
self.batch.add_to_index(Relationship, self.friendships, "friends",
"alice_&_bob", ab)
self.batch.run()
# check entries
rels = self.friendships.get("friends", "alice_&_bob")
assert len(rels) == 1
assert ab in rels
# done
self.recycling = [ab, alice, bob]
def test_can_add_two_similar_relationships(self, graph):
alice, bob, ab1, ab2 = self.graph.create({"name": "Alice"},
{"name": "Bob"},
(0, "KNOWS", 1),
(0, "KNOWS", 1))
self.batch.add_to_index(Relationship, self.friendships, "friends",
"alice_&_bob", ab1)
self.batch.add_to_index(Relationship, self.friendships, "friends",
"alice_&_bob", ab2)
self.batch.run()
# check entries
entries = self.friendships.get("friends", "alice_&_bob")
assert len(entries) == 2
assert ab1 in entries
assert ab2 in entries
# done
self.recycling = [ab1, ab2, alice, bob]
def test_can_add_relationships_only_if_none_exist(self):
alice, bob, ab1, ab2 = self.graph.create({"name": "Alice"},
{"name": "Bob"},
(0, "KNOWS", 1),
(0, "KNOWS", 1))
self.batch.get_or_add_to_index(Relationship, self.friendships,
"friends", "alice_&_bob", ab1)
self.batch.get_or_add_to_index(Relationship, self.friendships,
"friends", "alice_&_bob", ab2)
results = self.batch.submit()
assert results[0] == results[1]
# check entries
entries = self.friendships.get("friends", "alice_&_bob")
assert len(entries) == 1
assert ab1 in entries
# done
self.recycling = [ab1, ab2, alice, bob]
class TestIndexedRelationshipAddition(object):
@pytest.fixture(autouse=True)
def setup(self, legacy_graph):
try:
legacy_graph.delete_index(Relationship, "Friendships")
except LookupError:
pass
self.friendships = legacy_graph.get_or_create_index(Relationship, "Friendships")
self.batch = LegacyWriteBatch(legacy_graph)
self.graph = legacy_graph
def test_can_add_single_relationship(self, legacy_graph):
alice, bob, ab = self.graph.create({"name": "Alice"}, {"name": "Bob"}, (0, "KNOWS", 1))
self.batch.add_to_index(Relationship, self.friendships, "friends", "alice_&_bob", ab)
self.batch.run()
# check entries
rels = self.friendships.get("friends", "alice_&_bob")
assert len(rels) == 1
assert ab in rels
# done
self.recycling = [ab, alice, bob]
def test_can_add_two_similar_relationships(self, legacy_graph):
alice, bob, ab1, ab2 = self.graph.create(
{"name": "Alice"}, {"name": "Bob"},
(0, "KNOWS", 1), (0, "KNOWS", 1))
self.batch.add_to_index(Relationship, self.friendships, "friends", "alice_&_bob", ab1)
self.batch.add_to_index(Relationship, self.friendships, "friends", "alice_&_bob", ab2)
self.batch.run()
# check entries
entries = self.friendships.get("friends", "alice_&_bob")
assert len(entries) == 2
assert ab1 in entries
assert ab2 in entries
# done
self.recycling = [ab1, ab2, alice, bob]
def test_can_add_relationships_only_if_none_exist(self):
alice, bob, ab1, ab2 = self.graph.create(
{"name": "Alice"}, {"name": "Bob"},
(0, "KNOWS", 1), (0, "KNOWS", 1))
self.batch.get_or_add_to_index(Relationship, self.friendships,
"friends", "alice_&_bob", ab1)
self.batch.get_or_add_to_index(Relationship, self.friendships,
"friends", "alice_&_bob", ab2)
results = self.batch.submit()
assert results[0] == results[1]
# check entries
entries = self.friendships.get("friends", "alice_&_bob")
assert len(entries) == 1
assert ab1 in entries
# done
self.recycling = [ab1, ab2, alice, bob]
class TestIndexedNodeAddition(object):
@pytest.fixture(autouse=True)
def setup(self, graph):
try:
graph.legacy.delete_index(Node, "People")
except LookupError:
pass
self.people = graph.legacy.get_or_create_index(Node, "People")
self.batch = LegacyWriteBatch(graph)
self.graph = graph
def test_can_add_single_node(self):
alice, = self.graph.create({"name": "Alice Smith"})
self.batch.add_to_index(Node, self.people, "surname", "Smith", alice)
self.batch.run()
# check entries
smiths = self.people.get("surname", "Smith")
assert len(smiths) == 1
assert alice in smiths
# done
self.graph.delete(alice)
def test_can_add_two_similar_nodes(self):
alice, bob = self.graph.create({"name": "Alice Smith"},
{"name": "Bob Smith"})
self.batch.add_to_index(Node, self.people, "surname", "Smith", alice)
self.batch.add_to_index(Node, self.people, "surname", "Smith", bob)
nodes = self.batch.submit()
assert nodes[0] != nodes[1]
# check entries
smiths = self.people.get("surname", "Smith")
assert len(smiths) == 2
assert alice in smiths
assert bob in smiths
# done
self.graph.delete(alice, bob)
def test_can_add_nodes_only_if_none_exist(self):
alice, bob = self.graph.create({"name": "Alice Smith"},
{"name": "Bob Smith"})
self.batch.get_or_add_to_index(Node, self.people, "surname", "Smith",
alice)
self.batch.get_or_add_to_index(Node, self.people, "surname", "Smith",
bob)
nodes = self.batch.submit()
assert nodes[0] == nodes[1]
# check entries
smiths = self.people.get("surname", "Smith")
assert len(smiths) == 1
assert alice in smiths
# done
self.graph.delete(alice, bob)
class TestIndexedNodeAddition(object):
@pytest.fixture(autouse=True)
def setup(self, legacy_graph):
try:
legacy_graph.delete_index(Node, "People")
except LookupError:
pass
self.people = legacy_graph.get_or_create_index(Node, "People")
self.batch = LegacyWriteBatch(legacy_graph)
self.graph = legacy_graph
def test_can_add_single_node(self):
alice, = self.graph.create({"name": "Alice Smith"})
self.batch.add_to_index(Node, self.people, "surname", "Smith", alice)
self.batch.run()
# check entries
smiths = self.people.get("surname", "Smith")
assert len(smiths) == 1
assert alice in smiths
# done
self.graph.delete(alice)
def test_can_add_two_similar_nodes(self):
alice, bob = self.graph.create(
{"name": "Alice Smith"}, {"name": "Bob Smith"})
self.batch.add_to_index(Node, self.people, "surname", "Smith", alice)
self.batch.add_to_index(Node, self.people, "surname", "Smith", bob)
nodes = self.batch.submit()
assert nodes[0] != nodes[1]
# check entries
smiths = self.people.get("surname", "Smith")
assert len(smiths) == 2
assert alice in smiths
assert bob in smiths
# done
self.graph.delete(alice, bob)
def test_can_add_nodes_only_if_none_exist(self):
alice, bob = self.graph.create(
{"name": "Alice Smith"}, {"name": "Bob Smith"})
self.batch.get_or_add_to_index(Node, self.people, "surname", "Smith", alice)
self.batch.get_or_add_to_index(Node, self.people, "surname", "Smith", bob)
nodes = self.batch.submit()
assert nodes[0] == nodes[1]
# check entries
smiths = self.people.get("surname", "Smith")
assert len(smiths) == 1
assert alice in smiths
# done
self.graph.delete(alice, bob)
class TestIndexedNodeRemoval(object):
@pytest.fixture(autouse=True)
def setup(self, graph):
self.graph = graph
try:
graph.legacy.delete_index(Node, "node_removal_test_index")
except LookupError:
pass
self.index = graph.legacy.get_or_create_index(
Node, "node_removal_test_index")
self.fred, self.wilma, = graph.create(
{"name": "Fred Flintstone"},
{"name": "Wilma Flintstone"},
)
self.index.add("name", "Fred", self.fred)
self.index.add("name", "Wilma", self.wilma)
self.index.add("name", "Flintstone", self.fred)
self.index.add("name", "Flintstone", self.wilma)
self.index.add("flintstones", "%", self.fred)
self.index.add("flintstones", "%", self.wilma)
self.batch = LegacyWriteBatch(graph)
def check(self, key, value, *entities):
e = self.index.get(key, value)
assert len(entities) == len(e)
for entity in entities:
assert entity in e
def test_remove_key_value_entity(self):
self.batch.remove_from_index(Node,
self.index,
key="name",
value="Flintstone",
entity=self.fred)
self.batch.run()
self.check("name", "Fred", self.fred)
self.check("name", "Wilma", self.wilma)
self.check("name", "Flintstone", self.wilma)
self.check("flintstones", "%", self.fred, self.wilma)
def test_remove_key_entity(self):
self.batch.remove_from_index(Node,
self.index,
key="name",
entity=self.fred)
self.batch.run()
self.check("name", "Fred")
self.check("name", "Wilma", self.wilma)
self.check("name", "Flintstone", self.wilma)
self.check("flintstones", "%", self.fred, self.wilma)
def test_remove_entity(self):
self.batch.remove_from_index(Node, self.index, entity=self.fred)
self.batch.run()
self.check("name", "Fred")
self.check("name", "Wilma", self.wilma)
self.check("name", "Flintstone", self.wilma)
self.check("flintstones", "%", self.wilma)
class TestIndexedNodeRemoval(object):
@pytest.fixture(autouse=True)
def setup(self, legacy_graph):
self.graph = legacy_graph
try:
legacy_graph.delete_index(Node, "node_removal_test_index")
except LookupError:
pass
self.index = legacy_graph.get_or_create_index(Node, "node_removal_test_index")
self.fred, self.wilma, = legacy_graph.create(
{"name": "Fred Flintstone"}, {"name": "Wilma Flintstone"},
)
self.index.add("name", "Fred", self.fred)
self.index.add("name", "Wilma", self.wilma)
self.index.add("name", "Flintstone", self.fred)
self.index.add("name", "Flintstone", self.wilma)
self.index.add("flintstones", "%", self.fred)
self.index.add("flintstones", "%", self.wilma)
self.batch = LegacyWriteBatch(legacy_graph)
def check(self, key, value, *entities):
e = self.index.get(key, value)
assert len(entities) == len(e)
for entity in entities:
assert entity in e
def test_remove_key_value_entity(self):
self.batch.remove_from_index(Node, self.index, key="name",
value="Flintstone", entity=self.fred)
self.batch.run()
self.check("name", "Fred", self.fred)
self.check("name", "Wilma", self.wilma)
self.check("name", "Flintstone", self.wilma)
self.check("flintstones", "%", self.fred, self.wilma)
def test_remove_key_entity(self):
self.batch.remove_from_index(Node, self.index, key="name", entity=self.fred)
self.batch.run()
self.check("name", "Fred")
self.check("name", "Wilma", self.wilma)
self.check("name", "Flintstone", self.wilma)
self.check("flintstones", "%", self.fred, self.wilma)
def test_remove_entity(self):
self.batch.remove_from_index(Node, self.index, entity=self.fred)
self.batch.run()
self.check("name", "Fred")
self.check("name", "Wilma", self.wilma)
self.check("name", "Flintstone", self.wilma)
self.check("flintstones", "%", self.wilma)