Can mongodb search for any content in multi-level nested subdocuments?

  mongodb, question

For example, can you search for keys or values in n-level nesting

Can do, as long as you can locate the location of the array containing subdocuments, you can search for what you want, can see my answer before:

http://segmentfault.com/q/1010000002943721/a-1020000003716002

If it does not meet your requirements, you can describe your problem in detail, such as what kind of data structure you imagine and what kind of search you want to do.