Develop Reference

Add more field in a document without overwrite in Firebase Cloud Firestore

I wish to add fields in my firebase without overwriting it.
As you can see below, the user for my app will screen their emotions and the emotion will be uploaded to firebase.
Actually, user will be screened many times and each time they will get different emotions or same emotions.
Lets say the user screened their face and get Happiness, Sadness, Happiness respectively.
I wish to have my fields in the firebase console like this:
FaceEmotion: Happiness
FaceEmotion: Sadness
FaceEmotion: Happiness
Using my code below, at this moment I only get to overwrite the (FaceEmotion:) with same emotion values but not adding values as I wish like above. I've tried using array but I guess the problem is because the fieldname "FaceEmotion" is the same.
Is there a way for me to let Firestore generate autoID for the fieldname "FaceEmotion"? like maybe to have something like this:
FaceEmotion1: Happiness
FaceEmotion2: Sadness
FaceEmotion3: Happiness
String Emotion = EmotionType.toString();
userID = fAuth.getCurrentUser().getUid();
FaceEmotion = "FaceEmotion";
Map<String,Object> user = new HashMap<>();
user.put("FaceEmotion",Emotion);
DocumentReference documentReference = fStore.collection("users").document(userID).collection("FaceEmotion").document(FaceEmotion);
documentReference.update("FaceEmotion",FieldValue.arrayUnion(user)).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
Log.d(TAG, "onSuccess: Data has been saved "+ userID);
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Log.d(TAG, "onFailure: " + e.toString());
}
});

The issue is on how you are writing to the document, the solution is to create a new document for every new emoton, this way you will be able to add emotions to that collection.
The code to write the emotions with this modification would be something like:
String emotion = EmotionType.toString();
userID = fAuth.getCurrentUser().getUid();
faceEmotion = "FaceEmotion";
Map<String,Object> val = new HashMap<>();
val.put("FaceEmotion",emotion);
DocumentReference documentReference = fStore.collection("users").document(userID).collection("FaceEmotion").document();
documentReference.set(val).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
Log.d(TAG, "onSuccess: Data has been saved "+ userID);
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Log.d(TAG, "onFailure: " + e.toString());
}
});

firestore rules are not working while reading and writing the documents from my collections

I wrote the rules for my firestore database that is only authenticated users can read and write the data into documents. The rule is:
service cloud.firestore {
match /databases/{database}/documents {
// Allow the user to access documents in the "cities" collection
// only if they are authenticated.
match /PhoneAuthUsers/{phoneid=**} {
allow read, write: if request.auth.uid != null;
}
}
}
and i published the rule whenever i run the app i got the error line
"Missing Insufficient Permissions"
My authentication method is Phoneauthentication and i have the auth id in authentication tab. This is my db structure :
**- PhoneAuthUsers(Collection)
- Phonenumber(documents)
- Accounts(Collection)
-autoid(Document)**
Client side code :
db.collection("PhoneAuthUsers")
.whereEqualTo("PhoneNumber", mobile)
.get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
System.out.println("hello user");
if (task.isSuccessful()) {
for (DocumentSnapshot document : task.getResult()) {
Log.d(TAG, document.getId() + " => " + document.getData());
AuthID = document.getId();
System.out.print("AuthIDPhonenumber" + AuthID);
System.out.println("PhoneNumber");
String phone = document.getString("PhoneNumber");
Log.d(TAG, "onSuccess: " + phone);
if (phone.equals(mobile)) {
count = count + 1;
System.out.println("count" + count);
}
}
When trying to execute the query it shows missing insufficient permissions.
For example :
PhoneAuthUsers/+911234567890/Accounts/autoid/Field Values. when getting the documents from the phoneauthusers i am getting the missing insufficient permissions. How to solve the issue.

Getting documents from Firestore after network connection gets reset - Android

I am using Cloud Firestore in my Android app. It's a quiz application where I randomly get documents from Firestore. When the internet connection is good, the app works fine. When the network gets disconnected and then again gets connected, I am unable to read the documents. When I debug, I find that my get() method is not getting executed at all.
Iterator iterator = randomIds.iterator();
while (iterator.hasNext()) {
String documentId = (String) iterator.next();
DocumentReference documentReference = db.collection(categoryName).document(documentId);
if (documentReference!=null) {
documentReference.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
System.out.println("Task successful");
DocumentSnapshot document = task.getResult();
questionDetailsObj = new QuestionDetails();
questionDetailsObj = document.toObject(QuestionDetails.class);
if (questionDetailsObj != null) {
System.out.println("Question details: " + questionDetailsObj.getQuestion_text());
// Adding the questions to a list
questionsList.add(questionDetailsObj);
}
} else {
Log.d("MainActivity", "get() failed with " + task.getException());
}
}
});
}
}
I want to retrieve 10 documents. Sometimes, few documents are retrieved successfully and for the others I get the exception
get() failed with com.google.firebase.firestore.FirebaseFirestoreException:
Failed to get document because the client is offline.
I don't understand why would some documents come successfully and some fail to get retrieved. Please help me understand if any code changes are required.

Add document is queried but not added on the console nor listener is called

Ok I am a running into a weird problem with firestore
I have the following structure
collection1 -> document1- >collection2
I am adding a new document to collection2 with on complete listener( I tried the success listener as well). No errors are shown. The new document is not shown on the console. The listener is not being called. However, when I query, I get ALL the added documents including the new ones. What's going on here?
Map<String, Object> data = new HashMap<>();
data.put("completed", true;
data.put("date_completed", new Date());
data.put("location", "123 main st");
data.put("notes", "");
data.put("work", "");
db.collection("collection1").document(document1).collection("collection2")
.add(data)
.addOnCompleteListener(new OnCompleteListener<DocumentReference>() {
#Override
public void onComplete(#NonNull Task<DocumentReference> task) {
if (task.isSuccessful()) {
DocumentReference documentReference = task.getResult();
Log.d(TAG, "DocumentSnapshot written with ID: " + documentReference.getId());
det.setDocId(documentReference.getId());
addr_arr.add(det);
} else {
Log.w(TAG, "Error adding document", task.getException());
Toast.makeText(EditListActivity.this, "Failed operation - " + task.getException().getMessage(),
Toast.LENGTH_SHORT).show();
hideProgressDialog();
}
}
});
Here is the query I do
CollectionReference collecRef = db.collection("collection1").document(document1).collection("collection2");
collecRef.get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
for (DocumentSnapshot document : task.getResult()) {
// here I do document.get on all the fields, add them to object and add object to array
}
adapter.notifyDataSetChanged();
} else {
Log.d(TAG, "get failed with ", task.getException());
Toast.makeText(EditListActivity.this, "Failed operation - " + task.getException(),
Toast.LENGTH_SHORT).show();
hideProgressDialog();
}
}
});

Your app is acting like it's offline or somehow lacking a working internet connection.
When there is no network connection, the Firestore SDK won't fail on writes. It will store the write locally, and eventually sync that to the server. In the meantime, the local write becomes part of any queries, just like if the data was available on the server. So probably what you're seeing is the result of your local write.
(This is the same behavior you would see with Realtime Database.)
As far why the Firestore SDK doesn't have a connection, I don't know. You might have to troubleshoot that on your own.

Firestore : query all documents from a collection

My Firestore structure looks something like this:
-(coll)users
-(doc)uniqueID
name
email
(coll)clients
-(doc)uniqueID
clientName
clientEmail
What I am trying to achieve is the following:
The user signs in through FirebaseUI Auth flow
If the user (uid recovered from Auth) doesn't exist in firestore db I create a document named by his uid
Once I have the uid I run a query to load clients collection in order to display them into a list using a RecyclerView (if the collection is empty hence the user hasn't created any clients yet I display an empty list screen)
I tried to make a query using the code below as per the documentation:
clientsCollection = db.collection(FIRESTORE_COLLECTION_USERS)
.document(mUid)
.collection(FIRESTORE_COLLECTION_CLIENTS);
clientsCollection
.get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()){
for (DocumentSnapshot document: task.getResult()){
Log.d(LOG_TAG, document.getId() + " => " + document.getData());
}
} else {
Log.d(LOG_TAG, "error getting documents: ", task.getException());
}
}
});
I get the following RuntimeException:
java.lang.NullPointerException: Provided document path must not be null.
I get this even if the clients collection exits with some documents in it named by unique uid.
Thanks for any clue you could give me! :)

The error message indicates that mUid is null when you run the first statement. Most likely this means that you run this code before the user is signed in.
Make sure that you only call this code after the user has signed in, e.g. from an AuthStateListener.onAuthStateChanged():
FirebaseAuth.getInstance().addAuthStateListener(new AuthStateListener() {
public void onAuthStateChanged(FirebaseAuth auth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
clientsCollection = db.collection(FIRESTORE_COLLECTION_USERS)
.document(user.getUid())
.collection(FIRESTORE_COLLECTION_CLIENTS);
clientsCollection
.get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()){
for (DocumentSnapshot document: task.getResult()){
Log.d(LOG_TAG, document.getId() + " => " + document.getData());
}
} else {
Log.d(LOG_TAG, "error getting documents: ", task.getException());
}
}
}
}
})