javascript - Store order value in collection in Meteor -

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i want order collection.

i need store field order storing incrementing numerical value.

so docs have values 1,2,...,n.

the problem different docs belong different projects (by projectid) cannot have "normal auto-incrementing" field.

how done? guess use like

var lastdoc = mycollection.findone({ projectid: projectid }, { sort: { order: -1 } }); var nextorder = lastdoc ? lastdoc.order + 1 : 1;

every time insert documents. correct? if delete 1 of docs between other docs?


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