Code Expressions not working in animations delay in dynamically generated children

[gspassky]

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• [ ] 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

Hey guys,

I have dynamically generated items (from a variable) which I want to appear one by one. So I'd like to make animations delay dependent on the item key in the list.

I've set "Code Expression" as a value of animation delay, settings it to "150curIndex" where curIndex is an argument set to the item's "Index in List". So the first item will have delay set to 0 (1500), the second - to the 150 (150*1) and so on.

However, it doesn't work. All elements appear with no delay.

Expected Behavior

Elements must appear on the page with a delay - one after one

Steps to Reproduce

1. Create an app state variable (list)
2. Create a column with dynamic rows inside it (based on the variable)
3. Insert something to be displayed in a row
4. Add a fade in animation effect on page load for this object with the delay set to a code expression "150*curIndex" where curIndex is an argument set to the item's "Index in List"

Reproducible from Blank

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

Bug Report Code (Required)

gs1

Visual documentation

Environment

- FlutterFlow version: 4.1.79+
- Platform: Windows
- Browser name and version: Chrome Latest
- Operating system and version affected:

Additional Information

No response

[gspassky]

Finally I figured out the problem. The Code Expression shouldn't have the return type set - then, everything works fine!

[gspassky]

Actually, sometimes Code Expressions don't work when Apply same duration and delay toggle being used. Placing the expression directly into each animation is a workaround. Anyway, the buggy behavior presents...

[msusviela]

Hi @gspassky, can you please share a bug report code for this?
You can follow this documentation to generate one:
https://docs.flutterflow.io/troubleshooting/submit-bug-reports
It'll be very useful for us in order to replicate the issue

[msusviela]

Closing this issue since we haven't heard back from you. If you are still facing the problem please submit a new issue. Have a great day!