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Add transform option #23

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Add transform option #23

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6 changes: 4 additions & 2 deletions aggregate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,8 @@ ReactiveAggregate = function (sub, collection, pipeline, options) {
var defaultOptions = {
observeSelector: {},
observeOptions: {},
clientCollection: collection._name
clientCollection: collection._name,
transform: function(doc) { return doc; }
};
options = _.extend(defaultOptions, options);

Expand All @@ -13,7 +14,8 @@ ReactiveAggregate = function (sub, collection, pipeline, options) {
function update() {
if (initializing) return;
// add and update documents on the client
collection.aggregate(pipeline).forEach(function (doc) {
collection.aggregate(pipeline).forEach(function (result) {
const doc = options.transform(result);
if (!sub._ids[doc._id]) {
sub.added(options.clientCollection, doc._id, doc);
} else {
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