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function create_dbo_tnv

Maturity: 46

Creates a new node with label 'dbo_TNV' in a Neo4j graph database with specified properties and returns the created node.

File:
/tf/active/vicechatdev/neo4j_schema/neo4j_python_snippets.py
Lines:
1063 - 1072
Complexity:
simple

Purpose

This function is designed to insert a new dbo_TNV entity into a Neo4j graph database. It dynamically constructs a Cypher CREATE query based on the provided properties dictionary, executes the query using a run_query helper function, and returns the newly created node. This is useful for programmatically adding dbo_TNV nodes to a knowledge graph or database schema where dbo_TNV represents a specific entity type.

Source Code

def create_dbo_tnv(properties):
    """Create a new dbo_TNV node"""
    props_list = ', '.join([f"n.{prop} = ${prop}" for prop in properties.keys()])
    query = f"""
    CREATE (n:dbo_TNV)
    SET {props_list}
    RETURN n
    """
    result = run_query(query, properties)
    return result[0] if result else None

Parameters

Name Type Default Kind
properties - - positional_or_keyword

Parameter Details

properties: A dictionary containing key-value pairs representing the properties to be set on the new dbo_TNV node. Keys should be valid property names (strings) and values can be any data type supported by Neo4j (strings, numbers, booleans, lists, etc.). Example: {'name': 'Example', 'value': 123, 'active': True}

Return Value

Returns the first node from the query result if the creation was successful, typically a dictionary or node object containing the created node's properties and metadata. Returns None if the query execution fails or returns an empty result set. The exact return type depends on the implementation of the run_query function.

Dependencies

  • neo4j

Required Imports

from neo4j import GraphDatabase

Usage Example

from neo4j import GraphDatabase

# Assuming run_query is defined elsewhere
def run_query(query, params):
    driver = GraphDatabase.driver('bolt://localhost:7687', auth=('neo4j', 'password'))
    with driver.session() as session:
        result = session.run(query, params)
        return [record['n'] for record in result]
    driver.close()

# Create a new dbo_TNV node
properties = {
    'name': 'Test Node',
    'value': 42,
    'description': 'A test dbo_TNV node',
    'active': True
}

node = create_dbo_tnv(properties)
if node:
    print(f'Created node: {node}')
else:
    print('Failed to create node')

Best Practices

  • Ensure the properties dictionary contains only valid Neo4j property types to avoid query execution errors
  • Validate and sanitize input properties before passing them to this function to prevent injection attacks
  • Handle the None return value appropriately in calling code to detect creation failures
  • Consider adding error handling or logging within the function for better debugging
  • Be aware that property names in the dictionary should follow Neo4j naming conventions (no spaces, special characters)
  • The function uses parameterized queries which helps prevent Cypher injection, but ensure run_query properly implements this
  • Consider adding transaction management for consistency when creating multiple nodes
  • Ensure the run_query function properly closes database connections to avoid resource leaks

Tags

neo4j graph-database database create node cypher dbo_TNV insert data-persistence

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