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# Method name: queryAttendance()

# Method package: wixBookingsV2

# Method menu location: wixBookingsV2 --> attendance --> queryAttendance

# Method Link: https://dev.wix.com/docs/velo/apis/wix-bookings-v2/attendance/query-attendance.md

# Method Description:

Retrieves attendance information for booked sessions, given the provided paging, filtering, and sorting.


When querying attendance information, you can query from the perspective of:
+ **A booking.** Specify a booking ID to retrieve attendance information
for all sessions related to that booking.
+ **A session.** Specify a session ID to  retrieve attendance information
for all bookings related to that session.

For example, query by a course's `bookingId` and `status = "NOT_ATTENDED"` to
retrieve the attendance of a given participant in a course. For example, this query
helps you determine if a participant booked the course
but did not attend most of its sessions, taking away spots for other potential participants.

Query Attendance runs with the following defaults, which you can override:

- `id` sorted in `ASC` order
- `cursorPaging.limit` is `50`

For field support, see [supported filters](https://dev.wix.com/api/rest/wix-bookings/attendance/supported-filters).

> __Notes__:
> + Another way to retrieve attendance information is to call Bookings Reader V2's [Query Extended Bookings](https://dev.wix.com/api/rest/wix-bookings/bookings-reader-v2/query-extended-bookings) with `withBookingAttendanceDetails` as `true`.
> + Up to 100 results can be returned per request.
> + Only 1 filter is supported per query. If you define multiple filters in the same query, only the first is processed.

To learn about working with query endpoints, see
[API Query Language](https://dev.wix.com/api/rest/getting-started/api-query-language).


|PROPERTY	|SUPPORTED FILTERS & SORTING	
|:---:|:---:|
|`_id`|[`eq()`](/attendance/attendances-query-builder/eq),[`ne()`](/attendance/attendances-query-builder/ne),[`in()`](/attendance/attendances-query-builder/in),[`ascending()`](/attendance/attendances-query-builder/ascending)|
|`bookingId`|[`eq()`](/attendance/attendances-query-builder/eq),[`ne()`](/attendance/attendances-query-builder/ne),[`in()`](/attendance/attendances-query-builder/in),[`ascending()`](/attendance/attendances-query-builder/ascending)|
|`sessionId`|[`eq()`](/attendance/attendances-query-builder/eq),[`ne()`](/attendance/attendances-query-builder/ne),[`in()`](/attendance/attendances-query-builder/in),[`ascending()`](/attendance/attendances-query-builder/ascending)|
|`status`|[`eq()`](/attendance/attendances-query-builder/eq),[`ne()`](/attendance/attendances-query-builder/ne),[`in()`](/attendance/attendances-query-builder/in),[`ascending()`](/attendance/attendances-query-builder/ascending)|
|`numberOfAttendees`|[`eq()`](/attendance/attendances-query-builder/eq),[`ne()`](/attendance/attendances-query-builder/ne),[`in()`](/attendance/attendances-query-builder/in),[`lt()`](/attendance/attendances-query-builder/lt),[`le()`](/attendance/attendances-query-builder/le),[`gt()`](/attendance/attendances-query-builder/gt),[`ge()`](/attendance/attendances-query-builder/ge),[`ascending()`](/attendance/attendances-query-builder/ascending),[`descending()`](/attendance/attendances-query-builder/descending)|



# Method Code Examples:

*** Note: do not assume any prop names or enum values other than the ones in the example.

## queryAttendance example

```javascript
import { attendance } from 'wix-bookings.v2';

async function queryAttendance() {
  const { items } = attendance.queryAttendance().find();
}

```

## queryAttendance example for exporting from backend code

```javascript
import { attendance } from 'wix-bookings.v2';
import { webMethod, Permissions } from 'wix-web-module';

export const queryAttendance = webMethod(
  Permissions.Anyone,
  async (query) => {
    try {
      const result = await attendance.queryAttendance(query);
      return result;
    } catch (error) {
      console.error(error);
      // Handle the error
    }
  }
);

```

---