I am not sure, but I think that the problem has the same root as in the case of 
streaming: when lambda is invoked db is already wasted/rotten. So you can try 
to make a module with function that will fetch the rows from current.db and 
returns they. Then you can import this module in the controller and pass 
module.function to cache.ram.
Also I think that the best place for static images in the static folder, not in 
the db.

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