node.js - findarray in mongodb and output to array in nodejs -

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I have an array inside the mosaics in the collection according to the below. ("53dbb05fa976627439d43884"), "employee": [{"Date": "1986-03-10"}, {"Date": "1986-12 -11 "}]}

Now I have all the specific dates and outputs for the array in NodeJay format. 

  var collection = db.collection ('employee'); Collection distance ('employee .Date') ToArray (function (mistake, docia) {console.log (docsa);}); };   
 The problem is that I will get the following error, but those collections can be run on the diestink command on the mangodeb. Can I avoid error in anyway?  
  TypeError: Undefined   
 The method 'toArray' can not be called or is there any way I can get the same output Can I use collection.find ()?   
 
 
 you try  collection.distinct ('employee.data')  , But a collection called 'employee' I believe you want:  
  collections. ('Date')

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