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Mark, you can do this fairly easily using CollectionAccess and collection hook. In general you would just need 1 field with a number, then simply increment it.
A code like this might do the trick:
function onPreSave(request, response, modules){
var info = modules.logger.info;
var collectionAccess = modules.collectionAccess;
collectionAccess.collection('Counter').findAndModify({"Counter": {$exists:true}},{}, {$inc: {'Counter': 1}},{new: true},
function(err, doc) {
if (err) {
return response.error(err);
} else if (!doc.Counter) {
return response.error("Counter does not exist");
}
request.body._id = doc.Counter+'';
response.continue();
});
}
Mark Thien
Hi guys,
Perhaps this is sound silly as I understand that there is no transactional for nosql database. However, if someone can provide a workable solution that would be very helpful.
My client need a running id number for each bag of their production output. it is like
bag 1 : B00001
bag 2 : B00002
bag 3 : B00003
bag 4 : B00004
and etc
and I will create a collection just to maintain the running number. A few people may update the running number at the same time so it need to be locked then release.
Appreciate any workaround solution please. Thanks !
Cheers,
Mark Thien