Retrieve data from Firebase and display in listpicker

[Alpha2020]

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[TIMAI2]

Let us say you have your firebase project setup like this and you are using the built-in Firebase component blocks, and your firebase rules are read:true / write:true:

To get the data in seatid:

If you only want to return the items that contain "T1", you can either use the filter bar, or create a sublist from the tag value:

[ABG]

Your use of numbers as tags is problematic, compared to using the obviously unique seat IDs T1a, T1b, etc. as tags.

I would use this hierarchy for a booking application:

* venue name
  *   seats
    *   "T1a": true
    *   "T1d": true
    *   "T2a": true
...

and for specific events, use

* venue
  * event info
     * event seats
        * "T1a": true
        * "T1d": true
               ...

Beware of the difference in encoding of data structures loaded from AI2 into Firebase compared to data added manually via the Firebase console. Also, AI2's Firebase component has been known to confuse dictionaries with numbers as tags with arrays (lists).
(See post 2 at FAQ Section: Firebase)

[TIMAI2]

@ABG

Your use of numbers as tags is problematic

That is how Firebase does it if you leave it to its own devices....

[safe_kung]

Hi, I did the same as you, but I still can't.

[image]

[Gordon_Lu]

Welcome @safe_kung,

Please do not reply in topics which are a year old. Reply as a linked topic.

Also, when you use Firebase, you are warned of the following consequences.

FirebaseDB is an experimental feature which may change in the future or break. Packaged Apps built with this component may not function into the indefinite future.

Did you save your rules by clicking on 'Rules Playground'? What is your ProjectBucket for Firebase?

AICODE - FirebaseDB and App Inventor

[dora_paz]

In order to work you should set your firebase's project bucket to STATUS .

[safe_kung]

Thank you very much

[safe_kung]

Help me please If I went to display information yellow only.
What do I have to do?

[dora_paz]

The poblem is that your didn't add data in firebase from the app so in listview you will get only first word. In order to get all if you add data in firebase you should put data in the form of "\"your_data_here\"

[elmachi130]

si quesera obtener solo los elementos o values en un Label1 y no en una ListView1
como podría plantearlo?

[TIMAI2]

@elmachi130

if cheese get only the elements or values in an Label1 and not in a ListView1
as it may become one

Sorry, the translation is not very good. Can you ask in a different way ?

[elmachi130]

I would like to get all the values ​​and not the tags.
on Etiqueta5 o Label5

everything inside the green circle

[elmachi130]

logre obtenerlo pero desordenado
quisiera obtenerlo de menor a mayor con respecto a los primeros 18 dígitos si hay la necesidad de eliminar el " - " lo puedo hacer

saludos

[TIMAI2]

Firebase generally returns values unsorted. You will need to sort them in the app.

[Juan_Antonio]

Sort list extension

[FREE]Extension for Sort List with comparator

This is a simple extension, and now only have one block to sort a list: Download link: cn.kevinkun.listutil.aix (8.8 KB) How to use make a procedure with 2 parameters, and return a number (integer or float both ok) Example: sort a list of number [2022-05-13_103049] sort a list of list according to 2nd item (a number) of sublist [2022-05-13_103110] 3, sort a list of list according to 1st item (a string) of sublist [2022-05-13_103119] sort a list of list according to lenth of 1…

[ABG]

There are plenty of sort techniques in

FAQ Section: Lists

CSV Table to File and Back High Score List - ABG How to create a nested List Picker How to pick a random item from a list without picking duplicates? How to shuffle lists Merge sort using blocks - ABG How to sort lists - Italo How to Sort Lists - Taifun - WebViewer How to work with Lists Lookup in list of Ranges - Amerkashi MIT Lists Help Object Manager extension ($) - Jimdo.com Pairs Library - Scott F Sort lists by extension ($) - Jimdo.com Sort Lists in blocks - Sajal Sort Table…

[elmachi130]

ya conseguí ordenarlo pero cada que ejecuto me sale este aviso y se bloquea el global List2

aviso

despego la lista desde registro csv texto y lo vuelvo a poner luego presiono el botón y obtengo lo que necesito ordenado de color rojo
se bloquea

[Spicy_Topics]

Try this extension

[Free] Lists Extension an extension for arrange in ascending order, descending order, get min/max value

My first Extension Name: Lists PublishOn: 4-07-2021 Version: 1.0 Usage: Convert number and text in ascending order, Convert number and text in descending order, Find maximum number from a list, Find minimum number from a list, Reverse a list Blocks: [Screenshot (158)] HowToUse: [Screenshot (159)] Thanking: Thanks a lot to @Shreyash extension build with rush a new and improved way of building extension, thanks a lot to @Aarush_Kumar he gives me the tutorial of java DownloadLink: v1 com…

[TIMAI2]

Set the list inside your button click event