ImageDataObjectManager, like I changed it to in pastie code. However I did subclass page. Maybe you should try this as a subclass and make sure it functions or not, to remove any suspicion.

@amir.mostofi

I did a test with your code. Everything is fine.
I also tested the situation without ->setParentClass and empty filter. Everything is fine.

Did you rebuild the database ?

I imagine it's really easy to implement. I've never used the export feature of CTF, so that's why I skipped over it. Probably just a matter of adding a button with the right action. Unless you wanted to be able export a custom view, e.g., after filting, sorting, or searching on the recordset. That would be cool!

To Hu, UncleCheese or anyone who could help.

The issue I have is what ntessore mentioned back on page 6 of this topic. When filedataobjectmanager is used on page class "Page" for instance it all works fine and there's no need for a filter clause or setParentClass. However, when you subclass Page, the subclassed pages show all the managed files. You can circumvent this by using a filter clause. However, with or without the filter clause, you cannot add any managed files to the subclassed pages. Basically, when you try to add a file to a page which is a subclass of Page, the added file does not stick to that page. Its PageID remains 0.
So the issue is always related to subclasses of a page type, not the page type itself. I'm not sure how ntessore resolved this issue. He mentioned using setParentClass, but I'm not sure exactly how and where I should use this, because my attempts at setParentClass have not worked.