有条件地链接范围的最佳方式

I'm trying to extend the functionality of my serverside datatable. I pass some extra filters to my controller / datatable, which I use to filter results. Currently in my model I am testing whether the params are present or not before applying my scopes, but I'm not convinced this is the best way since I will have a lot of if/else scenario's when my list of filters grows. How can I do this the 'rails way'?I'm trying to extend the functionality of my se