Question

I need to achieve the following query –
tags is an internal array in my document, and I need to query documents that
tags contains ‘a’ and ‘b’ and (‘c’ or ‘d’)

can I do that with mongomapper?

Answer 1

Basically you need to do a query like this:

db.test.find({$and:[{tags:'a'},{tags:'b'}, {$or:[{tags:'c'}, {tags:'d'}] }]})

With mongomapper, try this:

Test.where({
  "$and" => [
    :tags => 'a',
    :tags => 'b',
    "$or" => [:tags => 'c', :tags => 'd']
  ]
})