var list=db.getCollection('MCOFiber').find({},{LaSol:1, "MCO.Consistency.Circuit.FiberSwitch.LogicalPortName" : 1,"MCO.Order.CreationDate" : 1  } ).sort( { "MCO.Consistency.Circuit.FiberSwitch.LogicalPortName" : -1 } )
 
for(var i=0; i < list.length() ; i++) {
   
     var ob = { LaSol : list[i].LaSol,
        data : list[i].MCO.Order.CreationDate ,
         
        port:   (list[i].MCO.Consistency.Circuit.FiberSwitch ==  null ?"":list[i].MCO.Consistency.Circuit.FiberSwitch.LogicalPortName)};
     
    print( ob);