Return list of saved items using populate() in Mongoose
When you do populate, then mongoose will based on the _ids that are stored in savedArticles array go and fetch from the Articles collection documents with those _ids and it will change _ids in savedArticles array with actual documents. So, when your frontend got the result, savedArticles array will be array of objects (documents from Articles collection) and not array of _ids.Now you can iterate over that array and access specific field of each article, like: savedArticles[0].title.