mirror of
https://github.com/hwchase17/langchain
synced 2024-11-10 01:10:59 +00:00
bccc9241ea
- **Description:** Updates to the Kuzu API had broken this functionality. These updates resolve those issues and add a new test to demonstrate the updates. - **Issue:** #11874 - **Dependencies:** No new dependencies - **Twitter handle:** @amirk08 Test results: ``` tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_query_no_params PASSED [ 33%] tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_query_params PASSED [ 66%] tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_refresh_schema PASSED [100%] =================================================== slowest 5 durations =================================================== 0.53s call tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_refresh_schema 0.34s call tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_query_no_params 0.28s call tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_query_params 0.03s teardown tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_refresh_schema 0.02s teardown tests/integration_tests/graphs/test_kuzu.py::TestKuzu::test_query_params ==================================================== 3 passed in 1.27s ==================================================== ```
96 lines
3.8 KiB
Python
96 lines
3.8 KiB
Python
from typing import Any, Dict, List
|
|
|
|
|
|
class KuzuGraph:
|
|
"""Kùzu wrapper for graph operations.
|
|
|
|
*Security note*: Make sure that the database connection uses credentials
|
|
that are narrowly-scoped to only include necessary permissions.
|
|
Failure to do so may result in data corruption or loss, since the calling
|
|
code may attempt commands that would result in deletion, mutation
|
|
of data if appropriately prompted or reading sensitive data if such
|
|
data is present in the database.
|
|
The best way to guard against such negative outcomes is to (as appropriate)
|
|
limit the permissions granted to the credentials used with this tool.
|
|
|
|
See https://python.langchain.com/docs/security for more information.
|
|
"""
|
|
|
|
def __init__(self, db: Any, database: str = "kuzu") -> None:
|
|
try:
|
|
import kuzu
|
|
except ImportError:
|
|
raise ImportError(
|
|
"Could not import Kùzu python package."
|
|
"Please install Kùzu with `pip install kuzu`."
|
|
)
|
|
self.db = db
|
|
self.conn = kuzu.Connection(self.db)
|
|
self.database = database
|
|
self.refresh_schema()
|
|
|
|
@property
|
|
def get_schema(self) -> str:
|
|
"""Returns the schema of the Kùzu database"""
|
|
return self.schema
|
|
|
|
def query(self, query: str, params: dict = {}) -> List[Dict[str, Any]]:
|
|
"""Query Kùzu database"""
|
|
result = self.conn.execute(query, params)
|
|
column_names = result.get_column_names()
|
|
return_list = []
|
|
while result.has_next():
|
|
row = result.get_next()
|
|
return_list.append(dict(zip(column_names, row)))
|
|
return return_list
|
|
|
|
def refresh_schema(self) -> None:
|
|
"""Refreshes the Kùzu graph schema information"""
|
|
node_properties = []
|
|
node_table_names = self.conn._get_node_table_names()
|
|
for table_name in node_table_names:
|
|
current_table_schema = {"properties": [], "label": table_name}
|
|
properties = self.conn._get_node_property_names(table_name)
|
|
for property_name in properties:
|
|
property_type = properties[property_name]["type"]
|
|
list_type_flag = ""
|
|
if properties[property_name]["dimension"] > 0:
|
|
if "shape" in properties[property_name]:
|
|
for s in properties[property_name]["shape"]:
|
|
list_type_flag += "[%s]" % s
|
|
else:
|
|
for i in range(properties[property_name]["dimension"]):
|
|
list_type_flag += "[]"
|
|
property_type += list_type_flag
|
|
current_table_schema["properties"].append(
|
|
(property_name, property_type)
|
|
)
|
|
node_properties.append(current_table_schema)
|
|
|
|
relationships = []
|
|
rel_tables = self.conn._get_rel_table_names()
|
|
for table in rel_tables:
|
|
relationships.append(
|
|
"(:%s)-[:%s]->(:%s)" % (table["src"], table["name"], table["dst"])
|
|
)
|
|
|
|
rel_properties = []
|
|
for table in rel_tables:
|
|
table_name = table["name"]
|
|
current_table_schema = {"properties": [], "label": table_name}
|
|
query_result = self.conn.execute(
|
|
f"CALL table_info('{table_name}') RETURN *;"
|
|
)
|
|
while query_result.has_next():
|
|
row = query_result.get_next()
|
|
prop_name = row[1]
|
|
prop_type = row[2]
|
|
current_table_schema["properties"].append((prop_name, prop_type))
|
|
rel_properties.append(current_table_schema)
|
|
|
|
self.schema = (
|
|
f"Node properties: {node_properties}\n"
|
|
f"Relationships properties: {rel_properties}\n"
|
|
f"Relationships: {relationships}\n"
|
|
)
|