Created
August 1, 2012 17:32
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mongoose virtual attributes
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| // http://mongoosejs.com/docs/virtuals.html | |
| // npm install mongoose underscore | |
| var _ = require('underscore'); | |
| var mongoose = require('mongoose'); | |
| mongoose.connect(process.env.MONGOLAB_URI || process.env.MONGOHQ_URL || 'mongodb://localhost/test', function(err){ | |
| if(err){ | |
| console.error(err); | |
| process.exit(1); | |
| } | |
| }); | |
| var Schema = mongoose.Schema, ObjectId = Schema.ObjectId; | |
| var RecipeSchema = new Schema({ | |
| id : {type: String, unique: true}, | |
| title : {type: String}, | |
| created_at : {type: Date, default: Date.now} | |
| }); | |
| RecipeSchema.virtual('url').get(function(){ | |
| return 'http://shokai.org/'+this.id; | |
| }); | |
| var Recipe = mongoose.model('Recipe', RecipeSchema); | |
| Recipe.latests = function(num){ | |
| return this.find().sort('created_at', -1).limit(num); | |
| }; | |
| var recipe = new Recipe({id: '29jg', title: '肉じゃが'}); | |
| recipe.save(); | |
| Recipe.latests(3).exec(function(err, docs){ | |
| if(err){ | |
| throw err; | |
| } | |
| else{ | |
| _.each(docs, function(doc){ | |
| console.log(doc.url); | |
| }); | |
| } | |
| mongoose.disconnect(); | |
| }); |
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| % node mongoose_virtual_attr.js | |
| http://shokai.org/29jg |
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how about the performence?