Final: Question 3 Solution M101JS: MongoDB for Node.js Developers

Final: Question 3

In this problem, you will update a document in the Enron dataset to illustrate your mastery of updating documents from the shell.

Please add the email address “[email protected]” to the list of addresses in the “headers. To” array for the document with “headers.Message-ID” of “<[email protected]>”

After you have completed that task, please download from the Download Handout link and run final3-validate.js to get the validation code and put it in the box below without any extra spaces. The validation script assumes that it is connecting to a simple mongo instance on the standard port on the localhost.

Solution: vOnRg05kwcqyEFSve96R  

How to achieve it?

  • Extract the downloaded handout
  • In the first command prompt, go to the Final3 folder where you will see final3-validate.js and package.json files.
  • Now run “npm install”
  • Now open your mongo shell with mongod in second command prompt and again in third command prompt mongo
  • Run command “show databases” and see whether Enron is there or not if install from final question 2 nor run query “use enron”
  • Run the following query:
    db.messages.update({“headers.Message-ID”:”<[email protected]>”}, {$addToSet: {“headers.To”: “[email protected]”}}, {multi: 1})
  • Now run the command “node final3-validate.js”  in first command prompt
  • You will see something like below:

    Welcome to the Final Exam Q3 Checker. My job is to make sure you correctly updated the document
    Final Exam Q3 Validated successfully!
    Your validation code is: vOnRg05kwcqyEFSve96R
  • Thus my answer is “vOnRg05kwcqyEFSve96R”
  • It may differ to yours so please confirm before submitting.



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