Firebase - firestore createdAt timestamps - react

Question

I am trying to figure out how to add timestamps to documents created in my firestore database.

I have read and tried each and every one of the suggestions in this post.<

Answer 1

To get the Firestore timestamp, firebase.firestore.FieldValue.serverTimestamp() is the correct call. Here's the catch: this method is only used within a DocumentReference .set() or .update() call (or, I believe, a CollectionReference .add()). For example, when adding a new document to your "contact" collection, you might combine formState with the new property 'createdAt' as you pass it to the .add() method:

handleFormSubmit(event) {
    // Now, you're getting form state here!
    console.log("SUCCESS!! :-)\n\n", formState);
    fsDB
      .collection("contact")
      .add({
        ...formState,
        createdAt: firebase.firestore.FieldValue.serverTimestamp()
      })
      .then(docRef => {
        console.log("docRef>>>", docRef);
        this.setState({ selectedValue: null });
        resetForm(initialValues);
      })
      .catch(error => {
        console.error("Error adding document: ", error);
      });
}