TypeError: argument of type 'NoneType' is not iterable about ckg HOT 2 OPEN

After debugging for long time, I found the problem.

in ckg/graphdb_connector/connector.py

def run_query(query, parameters={}):
    driver = getGraphDatabaseConnectionConfiguration(configuration=None, database=None)
    data = getCursorData(driver, query, parameters=parameters)

    return data

this query is :
MATCH p=(project:Project)-[:HAS_ENROLLED]->(:Subject)-[:BELONGS_TO_SUBJECT]-(:Biological_sample)-[:SPLITTED_INTO]->(a:Analytical_sample)-[r:HAS_QUANTIFIED_PROTEIN]->(protein:Protein)  WHERE project.id="P0000001"  AND toBoolean(r.is_razor) RETURN a.external_id AS name, a.external_id AS x,COUNT(DISTINCT(protein.id)) AS y, a.group AS group ORDER BY group;

I use this cypher in neo4j, and the result is none. Next, I click 'project' node to find 'P0000001', then find the problem is 'HAS_QUANTIFIED_PROTEIN' relationship disappeared!

Before I uploaded data to the project p0000001 on ckgapp , which may destroy the relationships in the database.

So I reimported the neo4j dump file for verification, and it succeeded.

This platform is very comprehensive and perfect！Thank you for your open source code, which is worth learning！

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