Question

I am using MongoDB to store information on coffees and I am having problems with a query.

My document structure is:

{ _id: "Thailand Bok", tags: ["Strong", "Smooth", "Dark"] }

I am trying to create query that allows me to search either on the name or tags.

So given that a query string may be “Thailand Bok” or [“Strong”, “Smooth”] I want to search for requests that either contain the _id or each tag.

If I were thinking in SQL terms it may be something like this:

"WHERE `_id` like 'Not present%' OR ("Strong" IN `tags` AND "Smooth" IN `tags`)"

The query I have so far is:

{ 
    $or: [
      { _id: { $regex: '^Not present', '$options': 'i' } },
      { 
          $and: [ 
              { tags: 'Strong' }, 
              { tags: 'Smooth' } 
          ]
      }
    ]
}

edit: correct a mistake in the query and clarified that it should work either if the _id matches OR the tags match

Answer 1

$and is only supported in version MongoDB 2.0+ I was using 1.8.2