For bookings to exist, we should create users in our data model.
Note
As with earlier chapters, please download the queries from the downloadable code bundle available with this book. Alternatively, the queries can also be downloaded from https://github.com/maheshlal2910/neo4j_graph_data_modelling.
To create users, we create a constraint on the e-mail of the user, which we will use as an unique identifier as shown in the following query:
neo4j-sh (?)$ CREATE CONSTRAINT ON (user:User) ASSERT user.email IS UNIQUE;
The output of the preceding query is as follows:
+-------------------+ | No data returned. | +-------------------+ Constraints added: 1
With the constraint added, let's create a few users in our system:
neo4j-sh (?)$ CREATE (:User{name:"Mahesh Lal", email:"[email protected]"}),
(:User{name:"John Doe", email:"[email protected]"}),
(:User{name:"Vishal P", email:"[email protected]"}),
(:User{name:"Dave Coeburg", email:"dave.coeburg...