db.movieDetails.find().pretty()

    There's a "poster" field for some movies.

----------

    Find a movie where the "poster" field is missing.

----------

    There's 1 movie with a missing "poster" field: "The Martian".

    * Go to IMDb and find the URL of the poster.
    * Insert the poster's URL in the document.

    db.movieDetails.updateOne({title: "The Martian"},
        {$set: {poster: "http://.../poster.jpg"}}
    )

    { "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }

    Here, $set is an update operator. When you use update*(), you
    must specify an update operator.

----------

    db.movieDetails.updateOne({title: "The Martian"},
    {
      $set: {
        "awards": {
          "wins": 8,
          "nominations": 14,
          "text": "Nominated for 3 Golden Globes. Another 8 wins & 14 nominations."
        }
      }
    });