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Dgraph GraphQL Tour

Basic

The has Function

The function has(edge_name) returns nodes that have an outgoing edge of the given name.

Dgraph also provides the filter argument has to find nodes that have an outgoing edge or predicate value.

The query example provided here queries for all people who have friends and then returns a count of how many friends they have.

Something to try: Query people that have friends and an age, and then count their friends that have a set age.

Dgraph GraphQL Tour

An interactive tutorial with real queries and real results, designed to run on Chrome on your machine.

Modules

. GraphQL Introduction . GraphQL Basic Features . GraphQL Schema . GraphQL Search . GraphQL Data and More Data . DQL Introduction . DQL Basic Features . DQL Schema . DQL Data and More Data . DQL Query Blocks and Variables . DQL Search

GraphQL Basic Features

Here you'll learn the basics of how to query graph data from Dgraph using GraphQL, and how to use and interpret the results.

Module Breakdown

2.1. Hello World 2.2. Graphs as results 2.3. Data types, Schema and Type System 2.4. Queries describe graphs 2.5. Functions and filtering 2.6. Logical Connectives (and, or, & not) 2.7. Sort Query Results 2.8. Pagination (first and offset) 2.9. Count 2.10. How Dgraph Search Works 2.11. The has Function 2.12. Aliases 2.13. Cascade 2.14. Comments 2.15. Congratulations
GraphQL
http://localhost:8080
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Response

2.11 The has Function