Tags down


Firestore get documents with maximum value

By : Fahd Alshri
Date : September 16 2020, 01:00 AM
should help you out Firestore doesn't offer any grouping in queries. There are no aggregate functions as you might know from SQL type databases.
If you need to track aggregate information, you will have to find another way to record that information. Usually that requires another collection (in your case, one document per user) where aggregate values, such as min and max values, are stored and updated as the "source" collection changes over time.
code :

Share : facebook icon twitter icon

Firebase Rules for Cloud Firestore to limit maximum number of documents

By : Jaspreet Singh
Date : March 29 2020, 07:55 AM
this will help You can protect this using the query property of the request object (see docs). Basically you can write a rule with a condition on the limit:
code :
allow read: if request.query.limit != 10

Flutter Firestore: specific documents from a collection (Firestore.collection.where)

By : Kaustubh
Date : March 29 2020, 07:55 AM
I wish this helpful for you Firebase does not support logical OR queries. In this case, you should create a separate query for each OR condition and merge the query results in your app.

Firestore: Getting documents sorted by a numeric field contained in the two sub-levels documents

By : user2338640
Date : March 29 2020, 07:55 AM
This might help you
They must be sorted according to the value of a numeric field, titled amount, present in a first sub-level document and also in a second sub-level document.

Pulling firestore image from firebase firestore database in react native - RangeError: Maximum call stack size exceeded

By : user3642909
Date : March 29 2020, 07:55 AM
will help you Instead of calling method directly source you do like this :
first call async method and in between time display image with static image and when image will available display that.
code :
//Function being called:
getPostImage = async (post) => {
  const imageUrl = await firebase.storage().ref(`photos/${post.uid}/${post.timestamp}.jpg`).getDownloadURL();
    downloadedImage: imageUrl
//Calling the function in the image component:
<Image source={this.state.downloadedImage ? {uri: this.state.downloadedImage} : 'localPlaceholderImage.png'} style={styles.postImage} resizeMode="cover" />

Firestore 'get' query for all documents in a collection returns no documents

By : Neil Hodgson
Date : March 29 2020, 07:55 AM
this one helps. First of all, you are reaching into the snapshot object using private properties:
code :
Related Posts Related Posts :
  • Having a textview below another textview that is centered?
  • RecyclerView inside a Dialog is overlapping other content of dialog
  • Jenkins Android building pipeline from different Git repositories
  • load large amount of data in android spinner blocks UI
  • How to add layout header in CustomTabsIntent
  • What is better to use Dagger 2 or Koin in Android app
  • How to save fragment state while navigating with navigation component
  • How to use data from onActivityResult in MVVM architecture?
  • For online Android games, what services are available to ensure the integrity of the APK file to prevent cheating?
  • Google removed my app without any notice. Has this happened to others?
  • Firebase database search returned no results
  • How to retry a request inside my viewmodel
  • how to use getItemAtPosition in my spinner from firebase in google map using android studio
  • ARCore – Object does not show in correct depth in Face Augmentation
  • Android - Get status codes of web pages opened in browser
  • How to add drawablePadding only for one side
  • How to get Device unique Id in my android application?
  • Bottom navigation doesn't show fragments in android jet pack navigation graph
  • React Native Firebase - Push data to Array allowing to display in a FlatList
  • Android image capture, how to get the lowest quality picture to take less space
  • Functions are not valid as a react child.This may happen if you return a component instead of <Component/> from re
  • How to Rename and Generate all APK & Bundle from Gradle with Product flavour and APK Splits
  • How do I deploy custom Image Processing algorithms in an android app?
  • How to save data offline in flutter
  • How do I add .cpp included files to the dependencies in android.mk?
  • Is there compulsion of using `FrameLayout` for loading fragments?
  • Difference between globalScope , corountineScope and viewScope in Kotlin
  • Can a device admin in android install a package?
  • Can two Apps (owner and client) share same database with different authentication spaces?
  • Set Text Radio Button from JSON Android Studio - AlertDialog
  • How to change the toolbar's home button color in androidx?
  • Could you tell me why the author need to wrap FrameLayout for Fragment?
  • How to convert string value to JSONArray in android
  • Android PDF viewer crashes when app is minified
  • Edittext aftertextchange triggers multiple times when text changed programmatically
  • When to use JobIntentService vs WorkManager?
  • how to remove all markers and polyline from google map in android?
  • How to convert JsonObject to class model kotlin android
  • Density DPI of Samsung Galaxy S10 too small?
  • Android Fusedlocationproviderclient not working with APN Sim its working with Wifi or ordinary internet or Offline
  • How to refresh the token generated by lambda API using retrofit?
  • Why should I take advantage to this design?
  • I can't exist from map's iteration
  • How to remove battery optimisation in android programmatically?
  • Used flutter_svg package but SVG files are not rendering in bottomnavigation bar
  • How to load GIF continuously on video in android using FFMPEG?
  • Render a shape upon mouse click using Libgdx (Android)
  • ERROR: Failed to resolve: com.google.firebase:firebase-messaging:19.2.0
  • React Native disable console.warn yellow box from the app screen bottom
  • Prevent Android App from getting installed on multiple users
  • App is crashing when installed from Google Play store
  • Fragments not added to backstack using Navigation Components
  • Do we still need to include `kapt com.android.databinding:compiler`
  • Return from all loops and return value
  • Android: Can I use google cloud storage API for SDK less than 26?
  • Android: How to call a function on click of an invisible button?
  • How observe a method String return value every second?
  • How to move a photo/video to an album with Flutter on mobile (iOS and Android)?
  • Is it a good practice to minimize the number of the activities in the application to minimize the number of possible mem
  • How to make a layout design like this
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk