Relay specification compliance in GraphQL - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the Relay specification in GraphQL?

The Relay specification defines a standard way to structure GraphQL schemas and queries to support efficient pagination, caching, and data fetching in client applications.

beginner

What are the two main connection types defined by the Relay specification?

The Relay specification defines Connection and Edge types to represent lists of data with pagination support.

intermediate

Explain the role of the pageInfo field in Relay-compliant GraphQL queries.

The pageInfo field provides information about the current page of results, such as whether there are more pages available before or after the current set.

intermediate

What arguments are commonly used in Relay connections to support pagination?

Relay connections commonly use first, last, before, and after arguments to paginate forward or backward through a list.

intermediate

Why does Relay require nodes in connections to have a globally unique id field?

Relay requires a globally unique id so clients can reliably cache and refetch individual objects across the app.

Which type does the Relay specification use to represent a list of items with pagination?

A Connection

B Array

C Object

D Scalar

Relay uses the Connection type to represent paginated lists.

What does the pageInfo field NOT provide in Relay pagination?

A Has next page

B Total count of items

C Start cursor

D Has previous page

pageInfo does not provide total count; it provides cursors and page availability info.

Which argument is used to fetch the first N items in a Relay connection?

A after

B before

C last

D first

The first argument fetches the first N items.

In Relay, what is the purpose of the Edge type?

A To represent a single node with a cursor

B To represent the entire list

C To store metadata about the query

D To define the schema

Edge wraps a node and includes a cursor for pagination.

Why must Relay nodes have a globally unique id?

A To improve query speed

B To reduce server load

C To allow clients to cache and refetch objects reliably

D To encrypt data

Unique IDs help clients identify and cache objects consistently.

Describe the Relay specification's approach to pagination in GraphQL.

Think about how Relay structures lists and controls which items are fetched.

Explain why globally unique IDs are important in Relay-compliant GraphQL schemas.

Consider how clients keep track of data objects.