Removing white spaces (leading and trailing) from string value

Question

I have imported a csv file in mongo using mongoimport and I want to remove leading and trailing white spaces from my string value.

Is it possible directly in mongo t

Answer 1

You can execute javascript in an MongoDB update command when it's in a cursor method:

db.collection.find({},{ "category": 1 }).forEach(function(doc) {
  db.collection.update(
    { "_id": doc._id },
    { "$set": { "category": doc.category.trim() } }
  );
})

If you have a ton of records and need to batch process, you might want to look at the other answers here.