Get all documents from a Firestore collection in Flutter

Question

I tried with different ways but i can't edit the structure of code

//First way QuerySnapshot querySnapshot = await db.firestoreInstance.collection('user-history').get(); var list = querySnapshot.docs; print('MY LIST ===== $list'); //Second way final CollectionReference collectionRef = db.firestoreInstance .collection(historyCollection); print('MY SECOND LIST ===== $list'); collectionRef.get().then((qs) { qs.docs.forEach((element) { print('MY doc id ${element.id}'); }); });

In my firebase collection(historyCollection) i have four documents but the debugger returns me empty array []. Is there another way to call all documents in certain collection through flutter? I'm trying to call this method through FutureBuilder component.

My version of firestore is: "cloud_firestore: ^0.16.0+1"

When we use the await we dont have to use then , so in the first way remove then , QuerySnapshot querySnapshot = await db.firestoreInstance.collection(historyCollection).get(); and make sure that write the name of colelction correclty — Fatima ayaa
– Fatima ayaa, Commented May 7, 2021 at 12:53
@Anna I edited my post and tried to do that told me, but still nothing. — vlladislav45
– vlladislav45, Commented May 7, 2021 at 13:06
I/flutter ( 7767): MY LIST ===== [] I/flutter ( 7767): MY LIST LENGTH ===== 0 I/flutter ( 7767): MY SECOND LIST ===== [] I/flutter ( 7767): MY SECOND LIST LENGTH ===== 0 — vlladislav45
– vlladislav45, Commented May 7, 2021 at 13:37

Momar · Accepted Answer · 2021-05-10 01:11:22Z

2

This should do the trick:

Future<List<dynamic>> getCollection(CollectionReference collection) async { try { QuerySnapshot snapshot = await collection.get(); List<dynamic> result = snapshot.docs.map((doc) => doc.data()).toList(); return result; } catch (error) { print(error); return null; } }

edited May 10, 2021 at 1:11

answered May 7, 2021 at 14:06

Momar

1799 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

vlladislav45 Over a year ago

Doesn't works for me, it's just method with the same code.

Momar Over a year ago

Sorry, there was an error in the code. Try it again, it should work now. You just have to pass the reference to the collection that you want to retrieve the documents from.

vlladislav45 Over a year ago

The first kind of code is correct "recipes.docs..". The problem is that everytime i'm getting empty array []. I don't know what is the problem. I reconsidering this code again and again but i don't see a mistake.

Momar Over a year ago

That's weird, are you referencing the correct collection? Also, could you share your firestore rules? That might be the source of the issue.

vlladislav45 Over a year ago

rules_version = '2'; service cloud.firestore { match /databases/{database}/documents { match /{document=**} { allow read, write: if true; } } }

It's only for testing purposes, that's why i'm allowing to read and write everyone

|

vlladislav45 · Accepted Answer · 2021-05-10 13:39:53Z

The entire problem was not from these fragments of code. This problem is came out from this that my collections have subcollections. I read about this and i understand that subcollections can live without their ancestors and the only way to access parents is to do this is directly specify the exact path and name of the document. To work this code in my case was needed to add dummy components of my entire set of collections. For more information please look up these two topics:

Collectives™ on Stack Overflow

Get all documents from a Firestore collection in Flutter

2 Answers 2

7 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

7 Comments

Comments

Linked

Related