09 Oct How to covert a MongoDB string field to an array
db.collection.find().forEach(function(myDocument) { db.collection.update( { _id: myDocument._id }, { "$set": { "fieldToUpdate": [myDocument.fieldToUpdate] } } ); }) ...
db.collection.find().forEach(function(myDocument) { db.collection.update( { _id: myDocument._id }, { "$set": { "fieldToUpdate": [myDocument.fieldToUpdate] } } ); }) ...