---
title: currentDocument
description: Pipeline expression helper that references the document currently being processed.
next: /firestore/pipelines/if-null
previous: /firestore/pipelines
---

`currentDocument()` returns an [expression](/firestore/pipelines) representing the Firestore document row the pipeline is processing. Use it when you need the full document map in a projection or when binding the document to a variable in upstream firebase-js-sdk samples.

Import from the pipelines entry point:

```js
import { currentDocument, mapGet } from '@react-native-firebase/firestore/pipelines';
```

# Basic example

Read a field from the current document map with `mapGet`:

```js
import { getFirestore } from '@react-native-firebase/firestore';
import {
  currentDocument,
  execute,
  field,
  mapGet,
} from '@react-native-firebase/firestore/pipelines';

const db = getFirestore('your-enterprise-database-id');

const snapshot = await execute(
  db
    .pipeline()
    .collection('books')
    .select(mapGet(currentDocument(), 'title').as('title'), field('author').as('author')),
);

snapshot.results.forEach(row => {
  console.log(row.data().title, row.data().author);
});
```

# Upstream define-stage pattern

The [firebase-js-sdk](https://firebase.google.com/docs/reference/js/firestore_pipelines#currentdocument) also shows binding the document with a `define` stage:

```js
firestore
  .pipeline()
  .collection('books')
  .define(currentDocument().as('doc'))
  .select(variable('doc').mapGet('title'));
```

React Native Firebase does not expose the `define` stage yet. Until it does, prefer `mapGet(currentDocument(), 'fieldName')` or other helpers that accept expression arguments directly.

# Platform support

| Platform | Support                                 |
| -------- | --------------------------------------- |
| Android  | Supported (native Firestore SDK)        |
| iOS      | Supported (native Firestore SDK)        |
| macOS    | Supported (firebase-js-sdk web interop) |

Pipeline execution requires a Firestore **Enterprise** database. See [Pipelines overview](/firestore/pipelines).