title: Mongoose node js $match not working on array of objectIds?
body: <p>Hi i want to match in an array of objectIds in mongoose using node js but i got the result in mongo shell but when implement with my code not find any result.</p>
  
  <p>This is my collection.</p>
  
  <pre><code>{
  "_id" : ObjectId("59c21ef1a870b05034f2cec1"),
  "__v" : 0,
  "name" : "Force",
  "createdAt" : ISODate("2017-09-20T07:55:29.816Z"),
  "updatedAt" : ISODate("2017-09-20T07:55:29.817Z"),
  "createdBy" : "599bfa0ee67842000493fefc",
  "timestamp" : 1505894129819.0,
  "isDeleted" : 0,
  "isActive" : 1,
  "updatedBy" : "",
  "subSegments" : [ 
      ObjectId("59c2172ab500ce0a946aa93a"), 
      ObjectId("59c21734b500ce0a946aa93b")
  ],
  "segments" : [ 
      ObjectId("59c2166db500ce0a946aa935"), 
      ObjectId("59c216a5b500ce0a946aa936")
  ],
  "subject" : [ 
      ObjectId("59c2179fb500ce0a946aa93f")
  ]
  </code></pre>
  
  <p>}</p>
  
  <p>This is my query :-</p>
  
  <pre><code> Topic.aggregate([
              {
                  $unwind: "$subject"
              },
              {
                  $match:{subject: new Mongoose.Schema.Types.ObjectId("59c2179fb500ce0a946aa93f")}
               }                
          ]
  </code></pre>
  
  <p>When i am running this query on mongo shell got result but in my code this query not return any result or error .</p>