World Cup 2018 is into its 3rd week and we felt it was about time that we refreshed the previous World Cup Graph that we created for the World Cup in Brazil 4 years ago. We've also put a GraphQL API on top of it so that people who are not familiar with Cypher can query the dataset. In this session we'll explain how we built the graph, show how to use it to answer some fun questions, and show off the GraphQL API that we built on top of the database using the GRANDstack starter kit.

1. The World Cup 2018 Graph
Jesús Barrasa
Mark Needham

3. • The World Cup Graph
• Querying with Cypher
• The GraphQL API
• Neo4j Bloom
Agenda

4. World Cup Graph

5. World Cup?

6. World Cup!

7. World Cup Graph Model

8. Host c27d992b.databases.neo4j.io
User worldcup
Password worldcup
Once you’ve logged in run :play worldcup-2018-queries
tl;dr - just let me play with the data!

9. What does this database contain?

10. All matches, squads, appearances, goals

11. Updated every 5 minutes during matches
updates

12. How did we get the data?

14. LOAD CSV WITH HEADERS FROM
"file:///matches.csv" AS csvLine
MERGE (match:Match {id: csvLine.id})
SET match.h_score = csvLine.h_score,
match.a_score = csvLine.a_score
...
Building the graph

15. Raw Data
github.com/mneedham/neo4j-worldcup/tree/master/data/2018/import

16. Importing the data
LOAD CSV WITH HEADERS FROM "file:///matches.csv" AS csvLine
WITH csvLine, toInt(csvLine.match_number) AS matchNumber
MERGE (match:Match {id: csvLine.id})
SET match.h_score = csvLine.h_score, match.a_score = csvLine.a_score,
match.attendance = csvLine.attendance, match.date = csvLine.date,
match.description = csvLine.home + " vs. " + csvLine.away, match.number = toInt(matchNumber)
MERGE (home:Country {name: csvLine.home})
MERGE (match)-[:HOME_TEAM]->(home)
MERGE (match)<-[:PLAYED_IN]-(home)
MERGE (away:Country {name: csvLine.away})
MERGE (match)-[:AWAY_TEAM]->(away)
MERGE (match)<-[:PLAYED_IN]-(away)
MERGE (worldCup:WorldCup {name: csvLine.world_cup}) ON CREATE SET worldCup.year = toInt(csvLine.year)
MERGE (match)<-[:CONTAINS_MATCH]-(worldCup)

17. Host c27d992b.databases.neo4j.io
User worldcup
Password worldcup
Once you’ve logged in run :play worldcup-2018-queries
Let's run some queries

18. I want to query this dataset and I
don't know Cypher

20. GraphQL

21. GraphQL is a query language for your API, and a
server-side runtime for executing queries by using a
type system you define for your data.
What is it?

22. GraphQL is a query language for your API, and a
server-side runtime for executing queries by using a
type system you define for your data.
What is it?

23. GraphQL is a query language for your API, and a
server-side runtime for executing queries by using a
type system you define for your data.
What is it?

24. GraphQL is a query language for your API, and a
server-side runtime for executing queries by using a
type system you define for your data.
What is it?
type Planet {
name: String
climate: String
}
type Character {
name: String
friends: [Character]
homeWorld: Planet
species: Species
}
type Species {
name: String
lifespan: Int
origin: Planet
}

25. Manual mapping code

28. bit.ly/worldcup-graphql

30. type Match {
id: Int!
description: String
homeScore: Int
awayScore: Int
homeTeam: Country @relation(name: "HOME_TEAM", direction: "OUT")
awayTeam: Country @relation(name: "AWAY_TEAM", direction: "OUT")
}
type WorldCup {
year: Int!,
name: String,
host: [Country] @relation(name: "HOSTED_BY", direction: "OUT")
}
type Country {
id: ID!
code: String
name: String
hostedWorldCups: [WorldCup] @relation(name: "HOSTED_BY", direction: "IN")
}
type Query {
matches(id: Int, description: String, first: Int = 10, offset: Int = 0): [Match]
}
bit.ly/worldcup-graphql-schema
bit.ly/worldcup-graphql-full-schema

31. NEO4J_URI=bolt://c27d992b.databases.neo4j.io
NEO4J_USER=worldcup
NEO4J_PASSWORD=worldcup

32. $ now
> https://worldcup-grand-stack-risnfdqvrb.now.sh [in clipboard] [5s]
> Synced 1 file (21.2KB) [5s]
> Deployment complete!
Deploying a GraphQL Server

33. worldcup-2018.now.sh/

34. I want to query this dataset and I
don't know GraphQL

35. Neo4j Bloom

36. bit.ly/neo4j-bloom-all-the-things

38. Let's take a look...

39. Thank you for listening!
Host c27d992b.databases.neo4j.io
User worldcup
Password worldcup