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Unions

In this article

About unions

A union is a type of object representing many objects.

For example, a field marked as an ProjectCardItem could be an Issue or a PullRequest because each of those objects can be inside a project card. Using a union instead of an object gives you flexibility.

For more information, see "Introduction to GraphQL."

Assignee

Types that can be assigned to issues.

AuditEntryActor

Types that can initiate an audit log event.

Possible types

Closer

The object which triggered a ClosedEvent.

Possible types

CreatedIssueOrRestrictedContribution

Represents either a issue the viewer can access or a restricted contribution.

CreatedPullRequestOrRestrictedContribution

Represents either a pull request the viewer can access or a restricted contribution.

CreatedRepositoryOrRestrictedContribution

Represents either a repository the viewer can access or a restricted contribution.

DeploymentReviewer

Users and teams.

Possible types

EnterpriseMember

An object that is a member of an enterprise.

IpAllowListOwner

Types that can own an IP allow list.

IssueOrPullRequest

Used for return value of Repository.issueOrPullRequest.

Possible types

MilestoneItem

Types that can be inside a Milestone.

Possible types

OrgRestoreMemberAuditEntryMembership

Types of memberships that can be restored for an Organization member.

OrganizationAuditEntry

An audit entry in an organization audit log.

Possible types

PermissionGranter

Types that can grant permissions on a repository to a user.

PinnableItem

Types that can be pinned to a profile page.

Possible types

ProjectCardItem

Types that can be inside Project Cards.

Possible types

PullRequestTimelineItems

An item in a pull request timeline.

Possible types

PushAllowanceActor

Types that can be an actor.

Possible types

Reactor

Types that can be assigned to reactions.

ReferencedSubject

Any referencable object.

Possible types

RenamedTitleSubject

An object which has a renamable title.

Possible types

RequestedReviewer

Types that can be requested reviewers.

Possible types

ReviewDismissalAllowanceActor

Types that can be an actor.

Possible types

SearchResultItem

The results of a search.

Entities that can sponsor others via GitHub Sponsors.

Possible types

StatusCheckRollupContext

Types that can be inside a StatusCheckRollup context.

Possible types

VerifiableDomainOwner

Types that can own a verifiable domain.