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node_modules/mongoose/examples/geospatial/person.js

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+
+// import the necessary modules
+var mongoose = require('../../lib');
+var Schema = mongoose.Schema;
+
+// create an export function to encapsulate the model creation
+module.exports = function() {
+  // define schema
+  var PersonSchema = new Schema({
+    name : String,
+    age : Number,
+    birthday : Date,
+    gender: String,
+    likes: [String],
+    // define the geospatial field
+    loc: { type : [Number], index: '2d' }
+  });
+
+  // define a method to find the closest person
+  PersonSchema.methods.findClosest = function(cb) {
+    return this.model('Person').find({ 
+        loc : { $nearSphere : this.loc },
+        name : { $ne : this.name }
+      }).limit(1).exec(cb);
+  };
+
+  mongoose.model('Person', PersonSchema);
+};