Get documents names in Firestore

问题

When I get several documents from a collection, the result is only an array with each doc data.

firestore.collection("categories").valueChanges().subscribe(data => {
    console.log(data);
    // result will be: [{…}, {…}, {…}]
};

---

How can I get the name of each doc?

The ideal result would look like this:

{"docname1": {…}, "docname2": {…}, "docname3": {…}}

回答1:

When you need to access additional metadata like the key of your Document, you can use the snapshotChanges() streaming method.

firestore.collection("categories").valueChanges().map(document => {
      return document(a => {
        const data = a.payload.doc.data();//Here is your content
        const id = a.payload.doc.id;//Here is the key of your document
        return { id, ...data };
      });

You can review the documentation for further explanation and example

回答2:

// this prints each document individual 
db.collection("categories")
    .onSnapshot((querySnapshot) => {
        querySnapshot.forEach((doc) => {
            console.log(doc.data()); // For data inside doc
            console.log(doc.id); // For doc name
    }
}

来源：https://stackoverflow.com/questions/47953387/get-documents-names-in-firestore