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Dgraph DQL Tour

Schema

Expand Predicate

expand(...predicates...) is used to query for all given predicates, rather than listing them in the query. Querying

expand(_all_)

queries returns all edges out of every node matched at that level in the query. Expand can be nested to then expand all predicates at the next level.

We’ll see later how to use expand with variables to query for a particular set of edges.

Note

As of version v1.1 you will need to add Types in your schema for expand(_all_) to work. See more in Type System.

You can also use your Types e.g expand(Card, Document) as arguments to expand().

Dgraph DQL 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

DQL Schema

This module shows you how schemas work inside Dgraph; and how to add, update, and delete data.

Module Breakdown

3.1. Adding schema - mutating schema 3.2. Adding Data - mutating data 3.3. External Identifiers 3.4. Language Support 3.5. Reverse edges 3.6. Reverse edges Query 3.7. Exercise : Integrating existing data 3.8. Deleting Data 3.9. Expand Predicate 3.10. Congratulations
Endpoint: /query
Dgraph: http://localhost:8080
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Response

3.9 Expand Predicate