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Retrieves a single dbo_ConceptHouses node from a Neo4j graph database by matching its unique ID property.

Purpose

This function queries a Neo4j database to fetch a specific dbo_ConceptHouses node using its ID. It's designed for retrieving individual concept house records from a knowledge graph, likely representing architectural or conceptual housing data in a DBpedia ontology structure. The function returns the first matching node or None if no match is found.

Source Code

def get_dbo_concepthouses_by_id(id):
    """Get a dbo_ConceptHouses node by its ID"""
    query = """
    MATCH (n:dbo_ConceptHouses {id: $id})
    RETURN n
    """
    result = run_query(query, {"id": id})
    return result[0] if result else None

Parameters

Parameter Details

id: The unique identifier of the dbo_ConceptHouses node to retrieve. Expected to be a string or integer value that matches the 'id' property of nodes labeled with 'dbo_ConceptHouses' in the Neo4j database. This parameter is used in a parameterized Cypher query to prevent injection attacks.

Return Value

Returns a single dbo_ConceptHouses node object (typically a dictionary or Neo4j Node object) if a matching node is found, or None if no node with the specified ID exists. The returned node contains all properties associated with that dbo_ConceptHouses record in the database. The function accesses the first element of the result list (result[0]) when results exist.

Dependencies

• neo4j

Required Imports

from neo4j import GraphDatabase

Usage Example

# Assuming run_query is already defined and configured
# Example setup (not shown in original code):
# driver = GraphDatabase.driver('bolt://localhost:7687', auth=('neo4j', 'password'))
# def run_query(query, params):
#     with driver.session() as session:
#         result = session.run(query, params)
#         return [record['n'] for record in result]

# Usage:
from neo4j import GraphDatabase

# Retrieve a concept house by ID
house_id = '12345'
house_node = get_dbo_concepthouses_by_id(house_id)

if house_node:
    print(f"Found house: {house_node}")
    # Access properties: house_node['property_name']
else:
    print(f"No house found with ID: {house_id}")

Best Practices

• Ensure the run_query function is properly defined with error handling and connection management
• Validate the 'id' parameter before calling this function to ensure it's not None or empty
• Handle the None return value appropriately in calling code to avoid AttributeError
• Consider adding type hints for better code documentation (e.g., def get_dbo_concepthouses_by_id(id: str) -> Optional[Dict])
• The function assumes run_query returns a list; ensure this contract is maintained
• Use parameterized queries (as done here with $id) to prevent Cypher injection attacks
• Consider adding logging for debugging database queries and results
• Ensure proper Neo4j driver cleanup and connection pooling in the run_query implementation

Tags

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