---
title: CommentEventSubject - GraphQL Admin
description: The subject line of a comment event.
api_version: 2026-04
api_name: admin
type: interface
api_type: graphql
source_url:
  html: >-
    https://shopify.dev/docs/api/admin-graphql/latest/interfaces/CommentEventSubject
  md: >-
    https://shopify.dev/docs/api/admin-graphql/latest/interfaces/CommentEventSubject.md
---

# Comment​Event​Subject

interface

The subject line of a comment event.

## Fields

* has​Timeline​Comment

  [Boolean!](https://shopify.dev/docs/api/admin-graphql/latest/scalars/Boolean)

  non-null

  Whether the timeline subject has a timeline comment. If true, then a timeline comment exists.

* id

  [ID!](https://shopify.dev/docs/api/admin-graphql/latest/scalars/ID)

  non-null

  A globally-unique ID.

***

##### Variables

```json
{
	"hasTimelineComment": "",
	"id": ""
}
```

##### Schema

```graphql
interface CommentEventSubject {
  hasTimelineComment: Boolean!
  id: ID!
}
```