restrict documents for mapreduce with mongoid
- by theBernd
I implemented the pearson product correlation via map / reduce / finalize. The missing part is to restrict the documents (representing users) to be processed via a filter query. For a simple query like
mapreduce(mapper, reducer, :finalize => finalizer, :query => { :name => 'Bernd' })
I get this to work.
But my filter criteria is a…