# rawCheckAsync

> This document is the Markdown version of [valibot.dev/api/rawCheckAsync/](https://valibot.dev/api/rawCheckAsync/). For the complete documentation index, see [llms.txt](https://valibot.dev/llms.txt).

Creates a raw check validation action.

```ts
const Action = v.rawCheckAsync<TInput>(action);
```

## Generics

- `TInput` `extends any`

## Parameters

- `action` `(context: Context<TInput>) => MaybePromise<void>`

### Explanation

With `rawCheckAsync` you can freely validate the input with a custom `action` and add issues if necessary.

## Returns

- `Action` `RawCheckActionAsync<TInput>`

## Examples

The following examples show how `rawCheckAsync` can be used.

### Add users schema

Object schema that ensures that only users not already in the group are included.

> This `rawCheckAsync` validation action adds an issue for any invalid username and forwards it via `path` to the appropriate nested field.

```ts
import { isAlreadyInGroup } from '~/api';

const AddUsersSchema = v.pipeAsync(
  v.object({
    groupId: v.pipe(v.string(), v.uuid()),
    usernames: v.array(v.pipe(v.string(), v.nonEmpty())),
  }),
  v.rawCheckAsync(async ({ dataset, addIssue }) => {
    if (dataset.typed) {
      await Promise.all(
        dataset.value.usernames.map(async (username, index) => {
          if (await isAlreadyInGroup(username, dataset.value.groupId)) {
            addIssue({
              received: username,
              message: 'The user is already in the group.',
              path: [
                {
                  type: 'object',
                  origin: 'value',
                  input: dataset.value,
                  key: 'usernames',
                  value: dataset.value.usernames,
                },
                {
                  type: 'array',
                  origin: 'value',
                  input: dataset.value.usernames,
                  key: index,
                  value: username,
                },
              ],
            });
          }
        })
      );
    }
  })
);
```

## Related

The following APIs can be combined with `rawCheckAsync`.

### Schemas

[`any`](/api/any.md), [`array`](/api/array.md), [`bigint`](/api/bigint.md), [`blob`](/api/blob.md), [`boolean`](/api/boolean.md), [`custom`](/api/custom.md), [`date`](/api/date.md), [`enum`](/api/enum.md), [`exactOptional`](/api/exactOptional.md), [`file`](/api/file.md), [`function`](/api/function.md), [`instance`](/api/instance.md), [`intersect`](/api/intersect.md), [`lazy`](/api/lazy.md), [`literal`](/api/literal.md), [`looseObject`](/api/looseObject.md), [`looseTuple`](/api/looseTuple.md), [`map`](/api/map.md), [`nan`](/api/nan.md), [`never`](/api/never.md), [`nonNullable`](/api/nonNullable.md), [`nonNullish`](/api/nonNullish.md), [`nonOptional`](/api/nonOptional.md), [`null`](/api/null.md), [`nullable`](/api/nullable.md), [`nullish`](/api/nullish.md), [`number`](/api/number.md), [`object`](/api/object.md), [`objectWithRest`](/api/objectWithRest.md), [`optional`](/api/optional.md), [`picklist`](/api/picklist.md), [`promise`](/api/promise.md), [`record`](/api/record.md), [`set`](/api/set.md), [`strictObject`](/api/strictObject.md), [`strictTuple`](/api/strictTuple.md), [`string`](/api/string.md), [`symbol`](/api/symbol.md), [`tuple`](/api/tuple.md), [`tupleWithRest`](/api/tupleWithRest.md), [`undefined`](/api/undefined.md), [`undefinedable`](/api/undefinedable.md), [`union`](/api/union.md), [`unknown`](/api/unknown.md), [`variant`](/api/variant.md), [`void`](/api/void.md)

### Utils

[`isOfKind`](/api/isOfKind.md), [`isOfType`](/api/isOfType.md)

### Async

[`arrayAsync`](/api/arrayAsync.md), [`awaitAsync`](/api/awaitAsync.md), [`customAsync`](/api/customAsync.md), [`exactOptionalAsync`](/api/exactOptionalAsync.md), [`forwardAsync`](/api/forwardAsync.md), [`intersectAsync`](/api/intersectAsync.md), [`lazyAsync`](/api/lazyAsync.md), [`looseObjectAsync`](/api/looseObjectAsync.md), [`looseTupleAsync`](/api/looseTupleAsync.md), [`mapAsync`](/api/mapAsync.md), [`nonNullableAsync`](/api/nonNullableAsync.md), [`nonNullishAsync`](/api/nonNullishAsync.md), [`nonOptionalAsync`](/api/nonOptionalAsync.md), [`nullableAsync`](/api/nullableAsync.md), [`nullishAsync`](/api/nullishAsync.md), [`objectAsync`](/api/objectAsync.md), [`objectWithRestAsync`](/api/objectWithRestAsync.md), [`optionalAsync`](/api/optionalAsync.md), [`pipeAsync`](/api/pipeAsync.md), [`recordAsync`](/api/recordAsync.md), [`setAsync`](/api/setAsync.md), [`strictObjectAsync`](/api/strictObjectAsync.md), [`strictTupleAsync`](/api/strictTupleAsync.md), [`tupleAsync`](/api/tupleAsync.md), [`tupleWithRestAsync`](/api/tupleWithRestAsync.md), [`undefinedableAsync`](/api/undefinedableAsync.md), [`unionAsync`](/api/unionAsync.md), [`variantAsync`](/api/variantAsync.md)