title: How to search in array of object in mongodb
body: <p>Suppose the mongodb document(table) 'users' is</p>
  <pre><code>{
      _id: 1,
      name: {
          first: 'John',
          last: 'Backus'
      },
      birth: new Date('Dec 03, 1924'),
      death: new Date('Mar 17, 2007'),
      contribs: ['Fortran', 'ALGOL', 'Backus-Naur Form', 'FP'],
      awards: [
          {
              award: 'National Medal',
              year: 1975,
              by: 'NSF'
          },
          {
              award: 'Turing Award',
              year: 1977,
              by: 'ACM'
          }
      ]
  }
  // ...and other object(person)s
  </code></pre>
  <p>I want to find the person who has the award 'National Medal' and must be awarded in year 1975
  There could be other persons who have this award in different years.</p>
  <p>How can I find this person using award type and year. So I can get exact person.</p>