update query

[Emmanuel VINET]

Hi,

Is it possible to use an attribute of the current document to update the value of an other like this :

db.collection.update({_id : {$exists : true}},

                      {$set : {"dt.y" : new Date(this.TMST * 1000).getFullYear(),

                                      "dt.m" : new Date(this.TMST * 1000).getMonth(),

                                      "dt.d": new Date(this.TMST * 1000).getDay(),

                                      "dt.h" : new Date(this.TMST * 1000).getHours()}},

                      false,true);

TMST is a special timestamp.

Thanks.

Emmanuel

[Scott Hernandez]

You will need to get the document first, then apply the logic for each
document in a single update. There are no update expressions on the
server like this.

You may want to watch/vote for this issue:
https://jira.mongodb.org/browse/SERVER-458

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[Emmanuel VINET]

thanks for your response.

I'll do it an other way.

Emmanuel