Data source not available in preview

[Danik-B]

Experience Builder Dev Edition 1.8.0

I have a custom widget where I use DataSourceManager to access a specific data source.  The odd thing is all my code works fine when I use the Live View mode in Exp Builder but fails when I preview the app.

When I console DataSourceManager.getInstance() in Exp Builder I can see my data source in the DataSources object but when I do that in preview the data source is not there.

Is there something I need to do to force the data source to be available in preview?

[YueyangLi]

@Danik-B Do you use DataSourceComponent in your widget? https://developers.arcgis.com/experience-builder/guide/use-data-source-in-widget/#read-and-display-t...

In builder, all data sources will be created automatically for the convenience of changing data setting. However, in preview, only data sources which are used will be created.