MongoDB Aggregate for DTO

aggregate.txt

db.Todos.aggregate([
  {
    $lookup: {
      from: "Tags",
      localField: "tags.$id",
      foreignField : "_id",
      as: "tags"
    }
  },
  {
    $project: {
      "tags._id":0,
      "tags._class":0,
      "tags.isActive":0,
      "tags.createdAt":0
    }
  }
])