I'm trying to get every field in one document in firestore. Field's key are random numbers and values are same with keys.How can i do that with document?
DocumentReference docRef = db.collection("cities").document("SF");
docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if (document.exists()) {
Log.d(TAG, "DocumentSnapshot data: " + document.getData());
// get every field in document.getData();
}
}
}
});
document.getData() returns a Map<String, Object> with all the fields from the document, as you can see from the API documentation. You iterate all the fields in the same way that you iterate all the entries in a Map.
for (Map.Entry<String, Object> entry : map.entrySet()) {
// entry.getKey() will contain the name of the field with each iteration.
}
Related
I am using Cloud Firestore and there is a array data in field. So how can I get data from array individually?
To get the values within ip_range array, please use the following lines of code:
FirebaseFirestore rootRef = FirebaseFirestore.getInstance();
rootRef.collection("aic").document("ceo").get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if (document.exists()) {
Map<String, Object> map = document.getData();
for (Map.Entry<String, Object> entry : map.entrySet()) {
if (entry.getKey().equals("ip_range")) {
Log.d("TAG", entry.getValue().toString());
}
}
}
}
}
});
Another approach would be:
rootRef.collection("products").document("06cRbnkO1yqyzOyKP570").get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if (document.exists()) {
ArrayList<String> list = (ArrayList<String>) document.get("ip_range");
Log.d(TAG, list.toString());
}
}
}
});
In both cases, the output in your logcat will be:
[172.16.11.1, 172.16.11.2]
I have a Firestore collection like this:
Take a look at kost collection. There are 4 docouments in it, and each document has the following fields: fasilitas, gender, harga, etc
For each document, I want to retrieve all the fields.
Now I have this:
FirebaseFirestore firestore = FirebaseFirestore.getInstance();
DocumentReference docRef = firestore.collection("kost").document();
docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()){
for (DocumentSnapshot ds:task.getResult()){
}
}
}
});
It's not even a correct code, task.getResult() is underlined:
foreach not applicable to type
'com.google.firebase.firestore.DocumentSnapshot
What's the correct way, then?
Your problems is in this code:
DocumentReference docRef = firestore.collection("kost").document();
docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
Your docRef points to a new, empty document. What you want instead is to point to the entire collection as shown in the documentation on reading all documents in a collection:
db.collection("kost")
.get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
for (QueryDocumentSnapshot document : task.getResult()) {
Log.d(TAG, document.getId() + " => " + document.getData());
}
} else {
Log.d(TAG, "Error getting documents: ", task.getException());
}
}
});
How to retrieve the data in nested object? Im able to get all the data in document but fail to retrieve the nested object, Just want to retrieve all the data under usr_card-card1,card2 into array or map
userid = FirebaseAuth.getInstance().getCurrentUser().getUid();
fStore = FirebaseFirestore.getInstance();
DocumentReference documentReference = fStore.collection("users").document(userid);
documentReference.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if (document.exists()) {
String usr_name = "usr_name",usr_email="usr_email";
String name = document.getString(usr_name);
String email = document.getString(usr_email);
Log.d(TAG, "DocumentSnapshot data: " + document.getData());
} else {
Log.d(TAG, "No such document");
}
} else {
Log.d(TAG, "get failed with ", task.getException());
}
}
});
Map type fields in Firestore documents show up as Map type objects in Java.
Map<String, Object> usr_card = (Map<String, Object) document.get("usr_card");
You can work with the returned Map exactly as you would any other Map.
I have a Firebase Firestore database in which I have to get all the field's inside a document by document id.
How to get the all the field values (inside Green Box) by document id (Red box)
If you want to get that specific document you can try this
DocumentReference docRef = db.collection("projects").document("YOURDOCIDHERE");
docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if (document.exists()) {
Log.d(TAG, "DocumentSnapshot data: " + document.getData());
} else {
Log.d(TAG, "No such document");
}
} else {
Log.d(TAG, "get failed with ", task.getException());
}
}
});
If you want get all documents by key order then you can try making a query like this.
docRef.orderByKey()
Check firebase documention for more info.
I'd like update document in cloud firestore according to value in document. Something like this. I have few documents with random names and values and one document with values id = 1 , name = patryk . And now I'd to update document with name=patryk. And I don't know document name because I make them like this and they have a random name.
b.collection("Users")
.add(postMapa)
.addOnCompleteListener
How to do this? here I need have the name of the document but I don't have.
Try this and make sure there will be only single document for name = patryk
db.collection("Users").whereEqualTo("name", "patryk").addSnapshotListener(new EventListener<QuerySnapshot>() {
#Override
public void onEvent(#Nullable QuerySnapshot queryDocumentSnapshots, #Nullable FirebaseFirestoreException e) {
if (e == null) {
String documentId = queryDocumentSnapshots.getDocuments().get(0).getId();
// here you have id but make sure you have only one document for name=patryk
}
}
});
Assuming that the id property is of type number and the name property is of type String, please use the following code in order to update all users with the id = 1 and name = patryk:
FirebaseFirestore rootRef = FirebaseFirestore.getInstance();
Query query = rootRef.collection("Users").whereEqualTo("id", 1).whereEqualTo("name", "patryk");
query.get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
List<String> list = new ArrayList<>();
for (DocumentSnapshot document : task.getResult()) {
list.add(document.getId());
}
for (String id : list) {
rootRef.collection("Users").document(id).update("name", "New Name").addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
Log.d(TAG, "Name Updated!");
}
});
}
}
}
});
If you are using a model class for your user, please see my answer from this post.
you can retrieve documents by their name (which does not really apply here):
DocumentReference docRef = db.collection("Users").document("patryk");
or you can query for values contained in a document (which might answer your question):
/* create a reference to the Users collection */
CollectionReference users = db.collection("Users");
/* create a query against the collection */
Query query = users.whereEqualTo("name", "patryk");
the rest is the same procedure, in both cases:
/* asynchronously retrieve the document */
ApiFuture<DocumentSnapshot> future = docRef.get();
/* future.get() blocks on response */
DocumentSnapshot document = future.get();
if (document.exists()) {
System.out.println("Document data: " + document.getData());
} else {
System.out.println("No such document!");
}
Simple way to get all document id under the collections:
firebase.collection("Users").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
List<String> list = new ArrayList<>();
for (QueryDocumentSnapshot document : task.getResult()) {
list.add(document.getId());
}
Log.d(TAG, list.toString());
} else {
Log.d(TAG, "Error getting documents: ", task.getException());
}
}
});