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Recently, for our college project, we had collected several JSON files that needed to be added to our MongoDB database. However, the schema of the JSON files did not match our database's schema, and manually adding the data was not feasible due to the large number of files.

To address this, I created a custom JavaScript script that checks an input directory and, for each JSON file present, selects the required fields from the input file. This script then creates a new JSON file in an output directory.

Next, we needed to add the data from the output directory to our MongoDB database. Since there were different tables, each requiring a separate script, I created a JavaScript script for each table.

This solution allowed us to automate the process of data transformation and database insertion, providing us with valuable experience in JavaScript and MongoDB