CODEWITHSUNDEEP
javascriptreactjsfirebasegoogle-cloud-firestore
kevin
kevin

Reputation: 3508

Firestore: Write a new document, then immediately return the new doc?

Is there a way to write -> read a newly added document in the firestore all in one go? I've been writing, then making a second query to read it, and while it works, I'm wondering if there is an alternate to what I have below. I've found similar questions here on SO, but a lot of them appear dated.

const someAsyncFunc = async () => {
  try {

      const lesson = await userLessonRef.get();
      if (lesson.exists) {
        // ? if lesson exists, return it.
        return lesson.data();
      }

      // ? if lesson does NOT exist, create it.
      await firebaseFirestore
        .collection(`users/${userID}/languages/${language}/lessons`)
        .doc(lessonID)
        .set({ greetings: 'hello' });

      // ? return the newly created lesson.
      const newLesson = await firebaseFirestore
        .collection(`users/${userID}/languages/${language}/lessons`)
        .doc(lessonID)
        .get();
      return newLesson.data();

  } catch (error) {
    console.log('Error finding lesson collection', error);
  }
}

Upvotes: 0

Views: 44

Answers (1)

Doug Stevenson
Doug Stevenson

Reputation: 317740

Other than a transaction (which is a combined read-then-write operation, there are no combined write/read operations. If you need the entire contents of a document after writing it, then you will have to perform a read.

Upvotes: 2

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