How can I unset an attribute from a single array element from the Mongo console. For example, how do I unset the junk attribute from time[1]
{
"_id" : ObjectId("4d525ab2924f0000000022ad"),
"name" : "hello",
"time" : [
{
"stamp" : "2010-07-01T12:01:03.75+02:00",
"reason" : "new"
},
{
"stamp" : "2010-07-02T16:03:48.187+03:00",
"reason" : "update",
"junk" : "yes"
},
{
"stamp" : "2010-07-02T16:03:48.187+04:00",
"reason" : "update"
},
]
}
This should do the trick:
db.coll.update({"time.junk": "yes"}, {$unset: {"time.$.junk": 1}});
Read on dot notation.
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