Removing specific items from array with MongoDB

Question

I am developing a web app using Codeigniter and MongoDB. The users can upload files and other users can comment on them.

I store the comments in an array called comm

Answer 1

If you can identify the comment item by matching userid, name or comment -- then you can remove that comment using update() command with $pull modifier along with the appropriate condition.

If you cannot do as above, include an unique id in the comments (like UUID).

To delete the comment, do the following:

db.coll.update({}}} )

If you use the id, which is preferred:

db.coll.update({}}} )