flutter: Retrieving multiple document id present inside a collection of firebase - firebase

Question

I want to get the id of every document in a collection. i tried this code but it return a single document id unlimited times. Can you please suggest a correction or a alternative
getrequest() {
linkref.document(uuid).
collection("Requests").getDocuments().then((value) async{
value.documents.forEach((doc) {
user.add(doc.documentID);
});},);
return ListView.builder(
itemBuilder: (BuildContext cntxt, int index){
return Text(user[index]);
});
}
there is a collection inside a document and inside this collection i have other document. i want to retrieve all documents id
This is screenshot of my firestore

Answer 1

Currently, you have just one document in firestore. I would suggest you add multiple documents and then test this command.You can use snapshot to get multiple documents as suggested by Sandeep using
Firestore.instance
.collection('Links')
.document(docID)
.collection('Requests')
.snapshots();
You can retrieve multiple documents with one request by querying documents in a collection. By default, Cloud Firestore retrieves all documents that satisfy the query in ascending order by document ID, but you can order and limit the data returned. To retrieve the documents conditionally using where() and then use get
More can be found in the documentation here
To use ListView builder, I would suggest using StreamBuilder something like this:
StreamBuilder<DocumentSnapshot>(
stream: Firestore()
.collection('homepage')
.document(widget.user.uid)
.collection('h')
.document(todaysDate())
.snapshots(),
builder: (context, snapshot) {
if (snapshot.data != null) {
snapshot.data.data.forEach((index, individualDetail) {
cardDetails[index] = individualDetail;
});
}
return cardDetails == null
? CircularProgressIndicator()
: ListView.builder(
itemBuilder: (context, index) {
return HomepageCards(
user: widget.user,
cardDetails:
cardDetails[cardDetails.keys.toList()[index]],
);
},
itemCount: (cardDetailKeys == null
? 0
: cardDetailKeys.length),
);
},
)
This is a snippet from my code but the StreamBuilder would look similar for you too.

Answer 2

Firestore.instance
.collection('Links')
.document(docID)
.collection('Requests')
.snapshots();