I have a `ModelList` of objects (like a `Story` object with a title and body). When updating an obje...

# compose

[AJ]

I have a ModelList of objects (like a Story object with a title and body). When updating an object in my ModelList, my UI doesn't change. However, if I add an element to the list, or just re-assign the entire list after changes, then the UI updates. Is this behavior expected? What is the best way to manage changing objects within a list that are represented on a Jetpack Compose UI, like in a VerticalScroller or LazyColumnItems so that it actually updates?

[Adam Powell]

The mutable object needs to back its mutable properties by mutableStateOf if you would like compose to see those changes

[Adam Powell]

Other options include keeping the story object immutable and updating the list with a new changed copy

[AJ]

Cool, the latter is what I've tried so far, I'll test out mutableStateOf

[Adam Powell]

If you're doing myModelList[index] = object.copy(one = 1) and that isn't causing recomposition, please file a bug as it should be seen as a structural change

[AJ]

Just to close the loop, I was only updating a property on my object. Using copy to change an object at a list index did work to update the UI, thanks for the help.