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https://github.com/mgerb/mywebsite
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78 lines
2.6 KiB
JavaScript
78 lines
2.6 KiB
JavaScript
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// import async to make control flow simplier
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var async = require('async');
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// import the rest of the normal stuff
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var mongoose = require('../../lib');
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require('./person.js')();
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var Person = mongoose.model('Person');
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// define some dummy data
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var data = [
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{ name : 'bill', age : 25, birthday : new Date().setFullYear((new
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Date().getFullYear() - 25)), gender : "Male" },
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{ name : 'mary', age : 30, birthday : new Date().setFullYear((new
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Date().getFullYear() - 30)), gender : "Female" },
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{ name : 'bob', age : 21, birthday : new Date().setFullYear((new
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Date().getFullYear() - 21)), gender : "Male" },
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{ name : 'lilly', age : 26, birthday : new Date().setFullYear((new
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Date().getFullYear() - 26)), gender : "Female" },
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{ name : 'alucard', age : 1000, birthday : new Date().setFullYear((new
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Date().getFullYear() - 1000)), gender : "Male" },
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];
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mongoose.connect('mongodb://localhost/persons', function (err) {
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if (err) throw err;
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// create all of the dummy people
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async.each(data, function (item, cb) {
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Person.create(item, cb);
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}, function (err) {
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// alright, simple map reduce example. We will find the total ages of each
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// gender
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// create the options object
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var o = {};
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o.map = function () {
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// in this function, 'this' refers to the current document being
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// processed. Return the (gender, age) tuple using emit()
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emit(this.gender, this.age);
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};
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// the reduce function receives the array of ages that are grouped by the
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// id, which in this case is the gender
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o.reduce = function (id, ages) {
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return Array.sum(ages);
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};
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// other options that can be specified
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// o.query = { age : { $lt : 1000 }}; // the query object
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// o.limit = 3; // max number of documents
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// o.keeptemp = true; // default is false, specifies whether to keep temp data
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// o.finalize = someFunc; // function called after reduce
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// o.scope = {}; // the scope variable exposed to map/reduce/finalize
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// o.jsMode = true; // default is false, force execution to stay in JS
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o.verbose = true; // default is false, provide stats on the job
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// o.out = {}; // objects to specify where output goes, by default is
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// returned, but can also be stored in a new collection
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// see: http://mongoosejs.com/docs/api.html#model_Model.mapReduce
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Person.mapReduce(o, function (err, results, stats) {
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console.log("map reduce took %d ms", stats.processtime);
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console.log(results);
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cleanup();
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});
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});
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});
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function cleanup() {
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Person.remove(function() {
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mongoose.disconnect();
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});
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}
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