Moving toward the data model
Our data model has additional labels, Actor and Director.
Having these specific labels is a best practice so that key queries will perform better, especially when the graph is large.
We must transform the Person nodes to have these specific labels. If a person acted in a movie, then they will be labeled as an actor. If a person directed a movie, they will be labeled as a director.
Adding the labels
Here is the code that we can use the add the Actor label to all nodes that have the ACTED_IN relationship:
You will execute this code in the next Challenge.
Unresolved directive in lesson.adoc - include::{repository-raw}/main/modules/3-refactoring-imported-data/lessons/5-add-labels/set-actor-label.cypher[]Check your understanding
Adding a label to a node
We want to add the Director label to all nodes that have the DIRECTED relationship to a Movie node. How would you add the label in the code below:
Once you have selected your option, click the Check Results query button to continue.
MATCH (p:Person)-[:DIRECTED]->()
WITH DISTINCT p
/*select:SET p:Director*/-
❏
CALL p.setLabel('Director')' -
✓
SET p:Director -
❏
p.labels=["Person","Director"]
Hint
You use the same keyword you use for assigning values to properties here.
Solution
The correct answer is: SET p:Director
Summary
In this lesson, you learned how to add a label to a set of nodes. In the next challenge, you will add the Actor and Director labels to the graph.