デモ-
$(更新) を使用します
db.collection.update({
"notes": {
"$elemMatch": { "block": 2, "curse": 5 }
}
},
{
$set: { "notes.$.score.b4": 40 }
})
upsert を読む :true
更新
デモ-
$function を使用します
db.collection.update(
{ "_id": "sad445" },
[
{
$set: {
notes: {
$function: {
body: function(notes) {
var record = { curse:5, block:2, score:{ b4:40 } };
if(!notes || !notes.length) { return [record]; } // create new record and return in case of no notes
var updated = false;
for (var i=0; i < notes.length; i++) {
if (notes[i].block == 2 && notes[i].curse == 5) { // check condition for update
updated = true;
notes[i].score.b4=40; break; // update here
}
}
if (!updated) notes.push(record); // if no update push the record in notes array
return notes;
},
args: [
"$notes"
],
lang: "js"
}
}
}
}
]
)