Not entirely sure I have a good grasp on your question, but here goes.
First up, yes you can access any model from any controller. Controllers tend to span models in producing and manipulating data for the view.
If you’re talking about creating controllers for each model under a common admin entry point, you can do that
script/generate controller admin/Usercontroller
script/generate controller admin/Itemcontroller
and so on
try it in a test project and you’ll see what I mean.
Hope that helps?!
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