CODEWITHSUNDEEP
flutterdartgoogle-cloud-firestore
Emir Kutlugün
Emir Kutlugün

Reputation: 73

Cloud Firestore Document Reference

I have 2 collections in cloud firestore and want to use both of them trough one field of my product 'userBids' which I'm using document reference:

Kullanıcılar(Users) enter image description here

Ürünler(Products)

enter image description here

Problem I want to reach my user from my 'userBids' field in my product model, but getting error below;

Class 'DocumentReference' has no instance method '[]'.

Receiver: Instance of 'DocumentReference'

Tried calling: )

 Text(data[0]['userBids'][index]['user']['nickname']

So how can I reach one collection from another collection in Cloud Firestore in Flutter?

Upvotes: 1

Views: 325

Answers (1)

LeadDreamer
LeadDreamer

Reputation: 3499

You need separate queries for "nested" documents. You should know that firestore does NOT actually nest documents; it's more an addressing/indexing convention than anything else. A "child" document can exist without any parent collection or document; it is perfectly valid for your database to have a document like:

.doc("collection1/document1/collection2/document2/collection3/document3")

without any of collection1, document1, collection2, or document2 ever existing. In the Firebase Console you'll see the names and ID's of these non-existant collections & documents in italics.

Upvotes: 1

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