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Retrieves a single dbo_Houses node from a Neo4j graph database by its unique ID.

Purpose

This function queries a Neo4j database to fetch a specific house record from the dbo_Houses node collection. It's designed for retrieving individual house entities when the exact ID is known, commonly used in detail views, data validation, or when processing specific house records in a graph database context.

Source Code

def get_dbo_houses_by_id(id):
    """Get a dbo_Houses node by its ID"""
    query = """
    MATCH (n:dbo_Houses {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_Houses node to retrieve. Expected to be a string or integer that matches the 'id' property of a dbo_Houses node in the Neo4j database. This parameter is used directly in the Cypher query as a parameterized value to prevent injection attacks.

Return Value

Returns the first matching dbo_Houses node as a dictionary-like object (likely a Neo4j Node object) if found, or None if no node with the specified ID exists. The returned node contains all properties associated with that dbo_Houses record in the database. The function assumes run_query returns a list of results and extracts the first element.

Dependencies

• neo4j

Required Imports

from neo4j import GraphDatabase

Usage Example

# Assuming run_query is properly configured to connect to Neo4j
# and the Neo4j database has dbo_Houses nodes with id properties

from neo4j import GraphDatabase

# Example usage
house_id = "12345"
house = get_dbo_houses_by_id(house_id)

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

Best Practices

• Always check if the return value is None before accessing properties to avoid AttributeError
• The function depends on an external run_query function that must be properly implemented with Neo4j connection handling
• Ensure proper error handling around database connection failures in the run_query implementation
• The ID parameter should be validated before calling this function to ensure it's in the expected format
• Consider adding type hints to the function signature for better code documentation (e.g., def get_dbo_houses_by_id(id: str) -> Optional[Dict])
• The function uses parameterized queries which is good for preventing Cypher injection attacks
• Ensure the Neo4j database has appropriate indexes on the id property of dbo_Houses nodes for optimal query performance

Tags

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