Rolling shoe tray

This is my first ever design, maybe it will be useful for someone.

Recently, i moved into new apartment, and there are no walls for shoe tray to rest against, just double door wall closet. everytime i open the door, it pushes my shoe tray away, so here is my solution.

4x magnets
4x. 608 type bearings
some double sided tape/hot glue or other adhesion

You need 2x front, 2x back brackets and 4 pins

Now your shoe tray moves along with the door and is detachable when needed.