Here's the domain model
Here's the microflow to create the new image object
Here's the page with the upload image widget.
As long as you commit the Student object, the association value you set should be in the database.
What kind of association did you create between Student and StudentImage (1:1, 1:M, M:M)? How are you trying to view the image associated with a Student, that is not working?
Student to StudentImage is 1:1. The image is uploading. I have a page that just lists all images, and I can see my images that I uploaded. But when I try to list the image with a name (which is stored in Student), it's blank.
The other way is on the EditStudent page (one student per page), I have the StudentImage (over associate StudentImage_Student), and the image is blank. This is where I put the image uploader, so in theory, once I upload an image associated with a student, that student image should show . . . I think.