firebased | Higher order Firebase component for React | Frontend Framework library
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kandi X-RAY | firebased Summary
Higher order Firebase component for React
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QUESTION
I need to get the value of another child in my Firebase database inside addChildEventListener
but addValueEventListener
won't get triggered. Meaning that user_name_list
will always be empty. How Can I solve this issue? Thanks!
ANSWER
Answered 2021-Jun-15 at 14:40The problem is not so much that your ValueEventListener
isn't getting triggered, but that you call list_fonct
before that happens.
I'll include some links at the bottom to learn more about this, but for now the simple fix is to move the call to list_fonct
into the onDataChange
that is called one the user data is loaded:
QUESTION
I'm doing a Group Chat with Firebase and currently I'm using a RecyclerView to display chat messages and I'm having a problem. When you open the app in the fragmented home and you go to chat activity and start chatting (adding elements to recycler view) all goes fine. But, when you go via the NavigationDrawer to another fragment and get back to the chat fragment using again this Navigation Drawer. When you add one element in the chat it appears all in the blank it just displays the last message. Anybody knows why does this happens?
Here I leave the RecyclerView Adapter Code:
...ANSWER
Answered 2021-Jun-15 at 13:55To solve your problem you can just remove the OnResume method because you are initializing the array every time you change between fragments and that is the problem.
QUESTION
I'm learning about reactJS and for the database I'm using firebase realtime Database.. everything works. but there is one problem..
i have Firebase url like this
...ANSWER
Answered 2021-Jun-15 at 03:22The correct URL to get just that specific key is:
https://my-app-name-rtdb.asia-southeast1.firebasedatabase.app/data/-Mc8l24sBroFw8JoA32e.json
So the .json
is last, and before that you have the entire path to the data that you want to retrieve.
QUESTION
So i'm using firebase realtime database, i want to add a listener to check if new child is added or not.
My issue is i don't want to receive list of all children, that's why i'm query the db with startAt(TIMESTAMP), my nodes are named with timestamps as well, but i'm still receiving all the existing children at the start.
...ANSWER
Answered 2021-Jun-14 at 18:00Taking a look at your code, we can see that you've created a instance of Query
, but you don't do anything with it. On the next line, you are expecting to be using this query, but you instead attach the listener to the raw DatabaseReference
.
QUESTION
I have the following Activity which get called when a user clicks on a FAB
...ANSWER
Answered 2021-Jun-12 at 02:52adapter = new GameAdapter(this, gameList); <--- Error here
Here this
refers to the surrounding class which is the anonymous inner class created by new ValueEventListener() {
instance and it is not a context
.
In order to refer to the outer class to get the context, you can replace this
with PicksheetActivity.this
QUESTION
I try to go from DataHelpActivity to DateFragment. I try with manny different ways but nothing much on my code. Take a look of my code. DateHelpActivity.class
...ANSWER
Answered 2021-Jun-11 at 18:41Use commit()
method instead of apply()
after setting values to preferences, as you are reading preferences immediately after asynchronous preference update.
QUESTION
I am working on a application with flutter and firebase and i am working on the auth for user and i want tu use the function uid
but it's dont work, why ?
ANSWER
Answered 2021-Jun-10 at 17:06In cases like this, I find it really helpful to keep the reference documentation for handy. In there, you can see that UserCredential
indeed does not have a uid
property, which explains the error message. If we browser a bit further, you'll notice that a credentials has a user
property, which in turn has a uid
.
So
QUESTION
I'm trying to add a dynamic parameter to my dynamic link.
For example, if I have a link as https://xyz.page.link/promo?id=1
added to the firebase console. I want that id=1 should be dynamic i.e using the same link I could pass on this for different ids rather than creating links for each id and checking each time into the code to redirect to the Flutter screen from getRoute() mentioned below.
Can anyone suggest some way to achieve this?
...ANSWER
Answered 2021-Jun-08 at 22:41I can share with you the code I use to create dynamic links with a parameter:
QUESTION
The way i inserted data into firebase realtime:
The code that procues this:
...ANSWER
Answered 2021-Jun-08 at 22:31There are multiple child nodes under Ride Requests
. So when you use newRequestRef.child(rideRequestId).once()
, your dataSnapShot
contains the information for all of them.
When you access dataSnapShot.value['pickup']
, there is no node Ride Requests/pickup
, so it returns null. So when you then to dataSnapShot.value['pickup']['latitude']
, you're calling ['latitude']
on null, which is what the error message says.
To solve this, you'll need to access the properties on the individual child nodes of Ride Requests
. This use to be pretty tricky (see [here]), but now that this feature request has been implement, you should be able to loop over dataSnapshot.value.values
.
So something like:
QUESTION
im trying to fetch data from firebase database, which im getting the data very well, but when i try to push all items received in an array, i obtain an array which i cannot iterate through like any other javascript array. here is my code:
...ANSWER
Answered 2021-Apr-09 at 07:57You can't push data like that. Try this code.
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