removeNodeProperty

Remove properties from nodes in Neo4j database

Syntax

removeNodeProperty(neo4jconn,node,propertyNames)

nodeinfo = removeNodeProperty(neo4jconn,node,propertyNames)

Description

removeNodeProperty(neo4jconn,node,propertyNames) removes properties from one or more nodes in a Neo4j^® database using a Neo4j database connection.

nodeinfo = removeNodeProperty(neo4jconn,node,propertyNames) returns updated node information as a Neo4jNode object for one node, or as a table for multiple nodes.

Examples

Remove One Node Property

Remove one node property from a single node in a Neo4j® database and access the node.

Create a Neo4j database connection using the URL http://localhost:7474/db/data, user name neo4j, and password matlab.

url = 'http://localhost:7474/db/data';
username = 'neo4j';
password = 'matlab';
neo4jconn = neo4j(url,username,password);

Check the Message property of the Neo4j connection object neo4jconn. The blank Message property indicates a successful connection.

neo4jconn.Message

ans =

     []

Retrieve the first node in the table of node information. This node has the label Person.

nlabel = "Person";
nodeinfo = searchNode(neo4jconn,nlabel);
node = nodeinfo.NodeObject(1);

Set the Title node property for a single node in the database using the Neo4j database connection.

properties.Title = "Analyst";
setNodeProperty(neo4jconn,node,properties)

Display the node information for the updated node.

nodeinfo = searchNode(neo4jconn,nlabel);
node = nodeinfo.NodeObject(1);
node.NodeData

ans = struct with fields:
     name: 'User1'
    Title: 'Analyst'

Remove the node property.

propertyNames = "Title";
removeNodeProperty(neo4jconn,node,propertyNames)

Display the node information for the updated node.

nodeinfo = searchNode(neo4jconn,nlabel);
node = nodeinfo.NodeObject(1);
node.NodeData

ans = struct with fields:
    name: 'User1'

Close the database connection.

close(neo4jconn)

Remove Multiple Node Properties and Return Output

Remove node properties from multiple nodes in a Neo4j® database. Access the updated node information using an output argument.

Create a Neo4j database connection using the URL http://localhost:7474/db/data, user name neo4j, and password matlab.

url = 'http://localhost:7474/db/data';
username = 'neo4j';
password = 'matlab';
neo4jconn = neo4j(url,username,password);

Check the Message property of the Neo4j connection object neo4jconn. The blank Message property indicates a successful connection.

neo4jconn.Message

ans =

     []

Find nodes with the label Person.

nlabel = "Person";
nodeinfo = searchNode(neo4jconn,nlabel);
nodes = nodeinfo.NodeObject;

Set the Title and Department node properties for multiple nodes using the Neo4j database connection. Display the updated node information for the first three nodes.

properties.Title = "Analyst";
properties.Department = "Sales";
nodeinfo = setNodeProperty(neo4jconn,nodes,properties);
nodeinfo.NodeData{1:3}

ans = struct with fields:
    Department: 'Sales'
          name: 'User1'
         Title: 'Analyst'

ans = struct with fields:
    Department: 'Sales'
          name: 'User3'
         Title: 'Analyst'

ans = struct with fields:
    Department: 'Sales'
          name: 'User2'
         Title: 'Analyst'

Remove the node properties using the property names. Display the updated node information for the first three nodes. The nodeinfo output argument is a Neo4jNode object.

propertyNames = ["Title" "Department"];
nodeinfo = removeNodeProperty(neo4jconn,nodes,propertyNames);
nodeinfo.NodeData{1:3}

ans = struct with fields:
    name: 'User1'

ans = struct with fields:
    name: 'User3'

ans = struct with fields:
    name: 'User2'

Close the database connection.

close(neo4jconn)

Input Arguments

neo4jconn — Neo4j database connection

Neo4jConnect object

Neo4j database connection, specified as a Neo4jConnect object created with the function neo4j.

node — Node

Neo4jNode object | Neo4jNode object array | numeric scalar | numeric vector

Node in a Neo4j database, specified as a Neo4jNode object, Neo4jNode object array, numeric scalar, or a numeric vector. For one node, specify a Neo4jNode object or a numeric scalar. For multiple nodes, specify a Neo4jNode object array or a numeric vector.

The numeric scalar or vector must contain Neo4j database node identifiers.

Example: 15

Example: [2,3,4]

propertyNames — Property names

character vector | cell array of character vectors | string scalar | string array

Property names, specified as a character vector, cell array of character vectors, string scalar, or string array. For one property, use a character vector or string scalar. For multiple properties, use a cell array of character vectors or a string array.

Example: "Analyst"

Example: ["Analyst" "Clerk"]

Data Types: char | string

Output Arguments

nodeinfo — Node information

Neo4jNode object | table

Node information in the Neo4j database, returned as a Neo4jNode object for one node or as a table for multiple nodes.

For multiple nodes, the table contains these variables:

• NodeLabels — Cell array of character vectors that contains the node labels for each database node

• NodeData — Cell array of structures that contains node information such as property keys

• NodeObject — Neo4jNode object for each database node

The row names of the table are Neo4j node identifiers of each database node.

Version History

Introduced in R2019a