5. Inserting, Updating, and Deleting Documents

Activity 5.01: Updating Comments for Movies

Solution:

Perform the following steps to complete the activity:

1. First, update the movie_id field in all three comments. As we need to apply the same update to all three comments, we will use the findOneAndUpdate() function along with the $set operator to change the value of the field:

   db.comments.updateMany(
     {
       "_id" : {$in : [
         ObjectId("5a9427658b0beebeb6975eb3"),
         ObjectId("5a9427658b0beebeb6975eb4"),
         ObjectId("5a9427658b0beebeb6975eaa")
       ]}
     },
     {
       $set : {"movie_id" : ObjectId("573a13abf29313caabd25582")}
     }
   )

   Using the update command, we find three movies by their _id, providing their primary keys using...