Neo4jRelation
Neo4j database relationship
Description
The Neo4jRelation
object represents a single relationship in
a Neo4j® database. Use this object to find information about the relationship
between two nodes in a Neo4j database.
Creation
Create a Neo4jRelation
object using the createRelation
, searchRelation
, and searchRelationByID
functions.
Properties
RelationID
— Relationship identifier
numeric scalar
This property is read-only.
Relationship identifier, specified as a numeric scalar. The Neo4j database assigns this number automatically.
Example:
3
Data Types: double
RelationData
— Relationship data
structure
This property is read-only.
Relationship data consisting of property keys and values for the unique relationship in the Neo4j database, specified as a structure. If the relationship has no properties, then this structure contains no fields.
Data Types: struct
StartNodeID
— Start node identifier
numeric scalar
This property is read-only.
Start node identifier, specified as a numeric scalar. This number specifies the start node of the Neo4j database relationship.
Example:
3
Data Types: double
RelationType
— Relationship type
character vector
This property is read-only.
Relationship type, specified as a character vector. This character vector specifies the type of the Neo4j database relationship.
Example: 'knows'
Data Types: char
EndNodeID
— End node identifier
numeric scalar
This property is read-only.
End node identifier, specified as a numeric scalar. This number specifies the end node of the Neo4j database relationship.
Example:
7
Data Types: double
Examples
Search Neo4j Database by Relationship Identifier
Search for information about a Neo4jRelation
object in a Neo4j® database and display the information.
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 values 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 the database for the relationship with the identifier 3
by using the Neo4j database connection.
relationid = 3; relinfo = searchRelationByID(neo4jconn,relationid)
relinfo = Neo4jRelation with properties: RelationID: 3 RelationData: [1×1 struct] StartNodeID: 1 RelationType: 'knows' EndNodeID: 3
relinfo
is a Neo4jRelation
object with these properties:
Relationship identifier
Relationship data
Start node identifier
Relationship type
End node identifier
Access the property keys and values of the relationship using the property RelationData
. Here, the relationship does not contain properties, so the structure has no fields.
relinfo.RelationData
ans = struct with no fields.
Version History
Introduced in R2018a
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