Can't save List<int> to app state

[Godfrey1912]

Has your issue been reported?

• I have searched the existing issues and confirm it has not been reported.
• I give permission for members of the FlutterFlow team to access and test my project for the sole purpose of investigating this issue.

Current Behavior

As per now-closed #683 (comment).

A list of integers cannot be saved to an app state of type list< integer >. The solution provided in issue 683 is incorrect, as saving as a type of list< JSON > does not resolve the issue.

Expected Behavior

Having created an app state variable of type list< int >, I expect to be able to save a list of integers obtained from a JSON path to that variable in an "Update app state" action. This is not possible, and produces an error as described in issue 683.

Note that manually keyed-in values into the same app state behave correctly. In other words, it is possible to have a list of integers in a correctly-configured app state, but not possible to save them in bulk.

Steps to Reproduce

Create API endpoint which return a list of integers
Create JSON path of List< integer >
Create App State with type List< integer >
Create Login button or Register and use action "Update App State" and save the JSON path to App State variable
Run the Test Mode
Hit Login or Register button and check browser console for error

Reproducible from Blank

• The steps to reproduce above start from a blank project.

Bug Report Code (Required)

IT4Khc/1sIhgrsMA7aXyKe9ahmEXHD8jarswlsJud0kbC72qG7YAW/SkQE9WZ7yhdH03Ok20kT81+sKLvtzIN+wqF0+rRaU/yKpQbQLKfEKWbLKuOpbse39PGtpKC0zA56a32BYnHM5idCUO73GQC+i9TnLcQJT1NlUaAPyIDLP/o3/uQ0SLb3kNh1JWeC/v

Context

I need a list of integers for populating the X and Y axes of a chart. I also need to be able to filter these values, such as ">10" or "=50". This not possible when the JSON path is saved to an app state variable as list< JSON >.

Visual documentation

Additional Info

See also my discussion at: https://community.flutterflow.io/c/discuss-and-get-help/setting-app-state-list-values#comment_wrapper_19446918

Environment

- FlutterFlow version: 3.7.12
- Platform:web
- Browser name and version:Chrome 113.0.5672.63
- Operating system and version affected: Linux pop_os 22.04

[WellDunDun]

I'm having the same issue and you can find my workaround for it here. Essentially I created a custom function to parse the JSON list into an int list . Hope this helps!

[kevintonb]

Hey @Godfrey1912 the bug was reproducible, thank you for reporting.

[wenkaifan0720]

Hi @Godfrey1912, @kevintonb. Care to share with me a test project that reproduces this issue? I looked into the project with the provided bug report code but couldn't find any List app state variables.

[kevintonb]

Hey @wenkaifan0720 , please check the page "Issue 920" in this test project

[Godfrey1912]

Hi @Godfrey1912, @kevintonb. Care to share with me a test project that reproduces this issue? I looked into the project with the provided bug report code but couldn't find any List app state variables.

Apologies, I had deleted them since I wasn't using them. I've created "testList" in my project now which you can test against too.

[wenkaifan0720]

This is because once JSON is involved, Flutter doesn't know the type of the data anymore and will produce an error like this: Unhandled Exception: type 'List<dynamic>' is not a subtype of type 'List<int>'.

The solution is to manually cast the data to type int, which we will do on our side in the next update.

[cristian-dev-it]

This is because once JSON is involved, Flutter doesn't know the type of the data anymore and will produce an error like this: Unhandled Exception: type 'List<dynamic>' is not a subtype of type 'List<int>'.

The solution is to manually cast the data to type int, which we will do on our side in the next update.

Hi @wenkaifan0720, thanks for you reply! Which could be the ETA of this fix?

[wenkaifan0720]

I have pushed a fix for this in our dev channel. Should be in production in about a week.