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Recent questions tagged Firebase

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firebase - Firestore Security Rules: If timestamp (FieldValue.serverTimestamp) equals now

How do I check if user on client sided created document with only firebase.firestore.FieldValue.serverTimestamp()? ... . Any ideas? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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728 views

1 answer

firebase - Export json from Firestore

As we can download json file at Firebase RTDB console, are there any way to export json file of ... data before/after updating document. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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746 views

1 answer

firebase - FirebaseMessagingService Crashes on Android O due to background execution limits

Our app is crashing on Android O due to the new background execution limits. We are on Firebase version 10.2.1, ... 11.4.2 resolves this issue. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

firebase - FCM: Message to multiple registration ids limit?

As per this quote I found: registration_ids - Type String array - (Optional) [Recipients of a message] Multiple ... for the info and direction! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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913 views

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firebase - Firestore security rules based on map values

I want to store if a user is permitted to read a document in the document itself, based on the user's email ... so, what am I doing wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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942 views

1 answer

firebase - Add timestamp in Firestore documents

I'm newbie to Firestore. Firestore docs says... Important: Unlike "push IDs" in the Firebase Realtime ... 1534183990, "timestamp":1534183990 } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

firebase - Firestore - How to get document id after adding a document to a collection

Is there a way to acquire the document id that was generated after adding a document to a collection? If I add a ... that I'm trying to get) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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594 views

1 answer

firebase - How to search document(s) from a collection based on a Field in Firestore database?

I'm working on a React Native application and I'm fetching profiles from a firebase collection. And I want to ... are on different fields here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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736 views

1 answer

firebase - Cloud Firestore - selecting region to store data?

I'm working on a product which for legal reasons needs to store user data in a specific region. I'm using ... to be in a specific region? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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817 views

1 answer

firebase - Firestore query reads all the documents again (from database) when only one is modified even with persistence enabled

Expected Behavior: I assumed that when some field of a document is modified, query will only return that ... documents are all identical. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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710 views

1 answer

firebase - cloud_firestore 0.14.0 how to use the data method

I updated to cloud_firestore 0.14.0 There's a few break changes: BREAKING: The get data getter is now a data() ... )).data()['screenName']; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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590 views

1 answer

firebase - How do I setup FirebaseAdapter in Android Studio?

I am trying to read data in real time from Firebase into a custom ArrayAdapter. From my research, it looks ... (participantValues); } }); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

872 views

1 answer

firebase - Swift - Could not cast value of type '__NSCFString' to 'NSDictionary'

I got this error, but I'm trying to get a String from a Dictionary. This is my code: FIRDatabase. ... Any help would be greatly appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

547 views

1 answer

firebase - Workaround for "Range filters on different fields" limitation?

newbie to firestore here and struggling with how to overcome the range filter on different fields limitation. Use ... in firestore? BR Stefan See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

774 views

1 answer

firebase - Firestore order by two fields

In firestore I'm wondering if there is a way to have a hueristic1 and get all data between two hueristic1 values but ... is a way to do this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

715 views

1 answer

firebase - Is there a way to generate a push ID from the Console in the new Realtime Database?

I have a listing node in my Database and wanted to add data into it from the web console. I want to have ... is this possible from the console? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

617 views

1 answer

firebase rule for unique property in firestore

I've found that question relatively often asked here, but i still cant figure out how to manage a rule for ... the object model looks as follows See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

676 views

1 answer

firebase - Is there a way to retrieve an existing notification_key based on a registration id or a notification key name?

Assuming that one has created a device group in Firebase Cloud Messaging, is there a way to retrieve an ... since it already exists. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

791 views

1 answer

firebase - Storing Extra Data Under GeoFire Nodes

I am storing location data via GeoFire in my database, here is the structure: geofire -Ke1uhoT3gpHR_VsehIv - ... Any input is appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

502 views

1 answer

firebase - How to structure NoSQL messages to get unreads by 1 query?

Say I have NoSQL structure as follows: messages chat_id (known) message_id (generated automatically) {author, ... implement such a task? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.3k views

1 answer

firebase - The argument type 'Map<String, dynamic> Function()' can't be assigned to the parameter type 'Map<String, dynamic>'

This could initially was working but after firebase update, it is now giving me this error. I have added asterisks ... 'Map<String, dynamic>'. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

802 views

1 answer

firebase - Firestore - Cloud Functions - Get uid

I'm trying to get the UID of the user authenticated by firebase web sdk, in the cloud function. The cloud ... well. # Thanks in advance, See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

687 views

1 answer

firebase - firebaseArray descending order?

Using firebaseArray, is it possible to order by a specified child key: (https://www.firebase.com/docs/web/guide/ ... .orderBy(desc, ...)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

883 views

1 answer

firebase - Firestore: Version history of documents

I'm looking for a proper way to structure Firestore database to handle multiple version histories of documents ... Am I missing something? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

891 views

1 answer

firebase - Google sign in doesn't work after release of flutter app

I developed a app with Flutter and tested on my device using the command: flutter run --release and everything ... it doesn't work anymore. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.0k views

1 answer

firebase - firestore cloud functions onCreate/onDelete sometimes immediately triggered twice

I have observed this behavior occasionally with both onCreate and onDelete triggers. Both the executions happened for the ... What am I missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

782 views

1 answer

firebase - Combine streams from Firestore in flutter

I have been trying to listen to more than one collection from Firestone using a StreamBuilder or something similar. ... thoughts on what to do. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

869 views

1 answer

firebase - Multiple Firestore queries, single promise / callback

I understand that Firestore doesn't support logical OR for queries. My idea is to create multiple queries and ... when every request finishes. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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