I added two dropdown exposed filters with Selective filter module. It takes all values from fields and puts them to the selective list. It works fine.
However I would like to configure my exposed filters the way that the second filter will show values according to the chosen value in the first one. E.g. if you choose a specific academic department in the first filter, the second one will offer you the list of this department's staff members.
Is it possible to achieve such a behavior? If so, do I need any extra modules (taxonomy?) or should I create a module myself?