updateNode
Update node labels and properties in Neo4j database
Syntax
Description
updateNode(
updates existing node properties with the specified node properties.neo4jconn
,node
,'Properties',properties
)
updateNode(
updates existing node labels and properties.neo4jconn
,node
,'Labels',labels
,'Properties',properties
)
Examples
Update Node Labels
Create a single node in a Neo4j® database and update its node labels.
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 = []
Create a single node in the database using the Neo4j database connection.
node = createNode(neo4jconn)
node = Neo4jNode with properties: NodeID: 47 NodeData: [1×1 struct] NodeLabels: []
node
is a Neo4jNode
object with these properties:
Node identifier
Node data
Node label
Update the node by adding the labels Person
and Employee
.
labels = ["Person","Employee"]; updateNode(neo4jconn,node,'Labels',labels)
Display the updated node information. nodeinfo
is a Neo4jNode
object.
nodeid = node.NodeID; nodeinfo = searchNodeByID(neo4jconn,nodeid); nodeinfo.NodeLabels
ans = 2×1 cell array
{'Person' }
{'Employee'}
Close the database connection.
close(neo4jconn)
Update Properties of Existing Node
Search for an existing node in a Neo4j® database, add a node property, and display the updated node properties.
Assume that you have graph data stored in a Neo4j database that represents a social neighborhood. This database has seven nodes and eight relationships. Each node has only one unique property key name
with a value ranging from User1
through User7
. Each relationship has the type knows
.
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 = []
Search for a node with the label Person
. Then, using the Neo4j database connection, filter the results by the property key and value for the person named User7
.
nlabel = 'Person'; node = searchNode(neo4jconn,nlabel,'PropertyKey','name', ... 'PropertyValue','User7')
node = Neo4jNode with properties: NodeID: 9 NodeData: [1×1 struct] NodeLabels: 'Person'
node
is a Neo4jNode
object with these properties:
Node identifier
Node data
Node labels
Retrieve the existing properties of the node by using the NodeData
property of the Neo4jNode
object. properties
is a structure.
properties = node.NodeData
properties = struct with fields:
name: 'User7'
Update the properties of the node. Add another node property by setting a new field in the structure to specify the job title of the person.
properties.title = 'Analyst'; updateNode(neo4jconn,node,'Properties',properties)
Display the updated node properties. nodeinfo
is a Neo4jNode
object.
nodeid = node.NodeID; nodeinfo = searchNodeByID(neo4jconn,nodeid); nodeinfo.NodeData
ans = struct with fields:
name: 'User7'
title: 'Analyst'
Close the database connection.
close(neo4jconn)
Update Labels and Properties for One Node
Create a single node in a Neo4j® database, update its node labels and properties, and display them.
Assume that you have graph data stored in a Neo4j database that represents a social neighborhood. This database has seven nodes and eight relationships. Each node has only one unique property key name
with a value ranging from User1
through User7
. Each relationship has the type knows
.
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 = []
Create a single node in the database using the Neo4j database connection.
node = createNode(neo4jconn)
node = Neo4jNode with properties: NodeID: 48 NodeData: [1×1 struct] NodeLabels: []
node
is a Neo4jNode
object with these properties:
Node identifier
Node data
Node labels
Create a table with one row that contains data about a person. Specify the name and job title of the person.
properties = table("User8","Analyst",'VariableNames',{'Name','Title'});
Update the node by adding the labels Person
and Employee
and the node properties defined in the table.
labels = ["Person","Employee"]; updateNode(neo4jconn,node,'Labels',labels, ... 'Properties',properties)
Display the updated node labels. nodeinfo
is a Neo4jNode
object.
nodeid = node.NodeID; nodeinfo = searchNodeByID(neo4jconn,nodeid); nodeinfo.NodeLabels
ans = 2×1 cell array
{'Person' }
{'Employee'}
Display the updated node properties.
nodeinfo.NodeData
ans = struct with fields:
Title: 'Analyst'
Name: 'User8'
Close the database connection.
close(neo4jconn)
Update Labels and Properties for Two Nodes
Create two nodes in a Neo4j® database, update their node labels and properties, and display the labels and properties for the first node.
Assume that you have graph data stored in a Neo4j database that represents a social neighborhood. This database has seven nodes and eight relationships. Each node has only one unique property key name
with a value ranging from User1
through User7
. Each relationship has the type knows
.
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 = []
Create two nodes in the database using the Neo4j database connection. These nodes represent two people.
user8 = createNode(neo4jconn); user9 = createNode(neo4jconn);
Create a table with two rows. Each row contains data about a person. Specify the name and job title for each person.
properties = table(["User8";"User9"],["Analyst";"Technician"], ... 'VariableNames',{'Name','Title'});
Update the nodes by adding the labels Person
and Employee
and the node properties defined in the table.
labels = ["Person","Employee"]; updateNode(neo4jconn,[user8;user9],'Labels',labels, ... 'Properties',properties)
Display the node labels for the nodes.
nodeid = [user8.NodeID user9.NodeID]; nodeinfo = searchNodeByID(neo4jconn,nodeid); nodeinfo.NodeLabels{:}
ans = 2×1 cell array
{'Person' }
{'Employee'}
ans = 2×1 cell array
{'Person' }
{'Employee'}
Display the node properties for the nodes.
nodeinfo.NodeData{:}
ans = struct with fields:
Title: 'Analyst'
Name: 'User8'
ans = struct with fields:
Title: 'Technician'
Name: 'User9'
Close the database connection.
close(neo4jconn)
Update Node Properties and Return Output
Create a single node in a Neo4j® database, update its properties, and display them. Access the updated node information using an output argument.
Assume that you have graph data stored in a Neo4j database that represents a social neighborhood. This database has seven nodes and eight relationships. Each node has only one unique property key name
with a value ranging from User1
through User7
. Each relationship has the type knows
.
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 = []
Create a single node in the database using the Neo4j database connection.
node = createNode(neo4jconn)
node = Neo4jNode with properties: NodeID: 49 NodeData: [1×1 struct] NodeLabels: []
node
is a Neo4jNode
object with these properties:
Node identifier
Node data
Node labels
Update the properties of a node that represents a person. Create a table with one row that contains the name and job title for this person. The nodeinfo
output argument is a Neo4jNode
object.
properties = table("User8","Analyst",'VariableNames',{'Name','Title'}); nodeinfo = updateNode(neo4jconn,node,'Properties',properties);
Display the node properties.
nodeinfo.NodeData
ans = struct with fields:
Title: 'Analyst'
Name: 'User8'
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]
labels
— Node labels
character vector | cell array of character vectors | string scalar | string array | cell array of cell arrays | cell array of string arrays
Node labels, specified as a character vector, cell array of character vectors, string scalar, string array, cell array of cell arrays, or cell array of string arrays. To specify one node label, use a character vector or string scalar. For multiple node labels, use a cell array of character vectors or a string array. To update multiple nodes with different node labels, use a cell array of cell arrays or a cell array of string arrays.
Example: 'Person'
Data Types: char
| string
| cell
properties
— Node properties
structure | structure array | table | cell array of structures
Node properties, specified as a structure, structure array, table, or cell array of structures.
When you specify a structure, the updateNode
function
converts each field and its corresponding value to a property and its
corresponding value in the database node. The function also sets the
NodeData
property of the Neo4jNode
object to this
structure.
When you specify a table that contains one row, the
updateNode
function converts each variable and its
corresponding value to a property and its corresponding value in the
database node. The function also converts the variables and their
corresponding values to fields and their corresponding values in a
structure. The function sets this structure to the
NodeData
property of the Neo4jNode
object.
To update multiple nodes, specify a structure array or table with multiple rows.
To update multiple nodes with different properties, specify a cell array of structures.
Note
If a property is missing its corresponding value, then the updated node does not contain this property.
Data Types: struct
| table
| cell
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 nodeNodeData
— Cell array of structures that contains node information such as property keysNodeObject
—Neo4jNode
object for each database node
The row names of the table are Neo4j node identifiers of each database node.
Version History
Introduced in R2018a
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