Update Friend Information in Social Neighborhood

Connect to Neo4j Database

Create a Neo4j connection object neo4jconn 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 =

     []

Add Two Friends to Social Neighborhood

Create two nodes in the database using the Neo4j database connection. Use the 'Labels' name-value pair argument to specify the label Person for each node.

label = 'Person';
user8 = createNode(neo4jconn,'Labels',label);
user9 = createNode(neo4jconn,'Labels',label);

Search for the node with the label Person and the property key name set to the value User7 by using the Neo4j database connection.

nlabel = 'Person';
user7 = searchNode(neo4jconn,nlabel,'PropertyKey','name', ...
    'PropertyValue','User7');

Create two relationships using the Neo4j database connection. Specify the relationship types as works with and studies with. The two relationships are:

relationinfo is a table that contains the relationship and node information.

startnode = [user8,user8];
endnode = [user7,user9];
relationtype = {'works with','studies with'};
relationinfo = createRelation(neo4jconn,startnode,endnode,relationtype);

Update Node Information for Added Friend

Update the properties of the node User8. Create a table with one row that contains the name and job title for this person. nodeinfo is a Neo4jNode object.

properties = table("User8","Analyst",'VariableNames',{'Name','Title'});
nodeinfo = setNodeProperty(neo4jconn,user8,properties);

Add the node label Student to User9.

labels = 'Student';
nodeinfo = addNodeLabel(neo4jconn,user9,labels);

Update Relationship Information for Added Friends

Create a table that defines the relationship properties. Here, User8 works with User7 in the workplace, and User8 studies with User9 in the library. Also, User8 started working with User7 on January 2, 2017, and User8 started studying with User9 on March 6, 2017.

properties = table(["Workplace";"Library"],["01/02/2017";"03/06/2017"], ...
    'VariableNames',{'Location','Date'});

Update both relationships with these properties. relationinfo is a table that contains the updated relationships.

relations = relationinfo.RelationObject;
relationinfo = setRelationProperty(neo4jconn,relations,properties);

Delete Relationship for Added Friend

Delete the relationship that connects User8 to User7.

relation = relations(1);
deleteRelation(neo4jconn,relation)

Delete Friends

Delete the added nodes and any associated relationships.

nodes = [user8,user9];
deleteNode(neo4jconn,nodes,'DeleteRelations',true)

Close Database Connection

close(neo4jconn)