MongoDB findAndModify: >>> find and update object in document's array

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Before I made some similar operation but I had only one document in collection and it looked like this:

Pure Mongo:

  db.table.findAndModify({query: {"features.properties.title":"OldValue"}, update: {$set:{"features.$.properties.description":"NewValue"}}})

Express:

   collection.findAndModify({"features.properties.title": title}, [],
    {$set: {"features.$.properties.explanation":explanation,
        "features.$.properties.completion":completion}}, {},
    function (err, result) {

        if (err) throw err;
      }
    ); 

Now I try to look after object in document's array and update it.

Syntax bellow give me element i want, but i don't know how to use it in findAndModify and update this object

  db.users.find({"username":"username"},{"array":{$elemMatch:{"name":"name"}}})

asked 32 secs ago

IOR88

136

MongoDB findAndModify: >>> find and update object in document's array