asset_not_string
Assets are required to be file paths (strings).
Description
#The analyzer produces this diagnostic when an assets
list contains a value that isn't a string.
Example
#The following code produces this diagnostic because the assets
list contains a map:
yaml
name: example
flutter:
assets:
- image.gif: true
Common fixes
#Change the assets
list so that it only contains valid POSIX-style file paths:
yaml
name: example
flutter:
assets:
- assets/image.gif
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.