6. Updating with Aggregation Pipelines and Arrays

Activity 6.01: Adding an Actor's Name to the Cast

Solution:

Perform the following steps to complete the activity:

1. Since only one movie document must be updated, use the findOneAndUpdate() command. Open a text editor and type the following command:

         db.movies.findOneAndUpdate({"title" : "Jurassic World"})

   This query uses a query expression based on the movie title.

2. Prepare an update expression to insert an element into the array. As the cast array must be unique, use $addToSet, as follows:

       db.movies.findOneAndUpdate(
           {"title" : "Jurassic World"},
           {$addToSet : {"cast" : "Nick Robinson"}}
       )

   This query inserts Nick Robinson into cast and also ensures that no duplicates are inserted...