Compound Indexes in Monger Query mq/hint

[sstraust]

Hi! I can't figure out how to get monger.query/hint working with compound indexes in monger query.

i.e., I have a compound index

  {
    v: 2,
    key: { sourceName: 1, 'published-date': -1 },
    name: 'sourceName_1_published-date_-1'
  }

in my mongo database,

and I'd like to provide a hint to ensure this index is used in my db query (issued from clojure).

I think kind of a fundamentalish issue is that index maps are ordered (i.e. {sourceName: 1, published-date: -1} represents a different index than {published-date: -1, sourceName: -1}), but clojure maps are not ordered so I'm not sure what I'm supposed to pass in or how to organize it to get around this.

I tried messing around with it for a bit, but I'm not really sure what to do or how to get it to work.

Thanks! -- Sammy

p.s. I read through the docs as best I could, and couldn't find anything, but if there is documentation on this, point me to it, and that would solve my issue! :D

[michaelklishin]

@sstraust consider using discussions instead of issues for questions. Clojure does have ordered maps and anything that implements the key map/collection/seq interfaces can be used with the hint function. Including ordered maps.

[sstraust]

thanks! at the time I really thought it was an issue based on my lack of knowledge