> ## Documentation Index
> Fetch the complete documentation index at: https://replyke-feat-push-rich-payload-fields.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# useUpdateEvent

> Edit an event's fields and curate its cover and gallery images (host-only)

## Overview

`useUpdateEvent` returns a callable that edits an event. **Host-only.** The mutable fields go under `update`; `hostIds`, `status`, and `spaceId` are not editable here. Pass `cover` to **replace** the cover, `gallery` to **append** images, and `update.removeImageIds` to remove existing event images — any image operation sends `multipart/form-data` and requires the `files-images` bundle.

## Usage Example

```tsx theme={null}
import { useUpdateEvent } from "@sublay/react-js";

function EditEvent({ eventId }: { eventId: string }) {
  const updateEvent = useUpdateEvent();

  const handleSave = async (newCover: File) => {
    const event = await updateEvent({
      eventId,
      update: { capacity: 150, description: "Now with more space!" },
      cover: { file: newCover, options: { mode: "original-aspect", sizes: { full: 1600 } } },
    });
    console.log("Updated:", event.id);
  };
}
```

## Parameters

<ParamField path="eventId" type="string" required>The event to update.</ParamField>

<ParamField path="update" type="object" required>
  The mutable fields to change. All optional:
  `title`, `description`, `startTime`, `endTime`, `timezone`, `type`, `url`,
  `venueName`, `address`, `location` (`{ latitude, longitude }`), `visibility`,
  `capacity`, `allowMaybe`, `guestListVisible`, `metadata`, and `removeImageIds`
  (`string[]` — File IDs of existing event images to remove).
</ParamField>

<ParamField path="cover" type="{ file: File | RNFile; options?: UploadImageOptions }">
  New cover image — replaces the existing cover. Sends multipart.
</ParamField>

<ParamField path="gallery" type="{ files: (File | RNFile)[]; options?: UploadImageOptions }">
  Gallery images to append. Sends multipart.
</ParamField>

## Returns

Returns a `Promise<Event>` — the updated [Event](/data-models/event).

## See Also

* [Update Event API](/api-reference/events/update-event)
* [EventProvider & useEvent](/sdk/events/provider-and-hook)