mongoose常用的集中find方式

mongoose.find.example.js

var DB = require( '../../database/' );
var mongoose = require( 'mongoose' );
var Item = mongoose.model( 'item' );

describe( 'mongooseTest', function(){

    it( 'localtion test', function(){

        var itemsLen = 0;

        runs(function (){

            Item.find({ location: { $near: [1328067661923, 1328067913590], $maxDistance: 10791000000 } }, function ( err, items ){

                itemsLen = items.length;
            });
        });

        waitsFor( function (){

            return itemsLen;
        }, 5000 );

        runs(function(){

            expect( itemsLen ).toBe( 3 );
        });

    });

    it( 'in', function(){

        var itemsLen = 0;
        var itemIds = [ '4f9d22eabb1c3cf31e000009', '4f9d23040436e1051f000009', '4f9d22eabb1c3cf31e000007' ];

        runs(function (){

            Item.find({ _id: { $in: itemIds }}, function ( err, items ){

                itemsLen = items.length;
            });
        });

        waitsFor( function (){

            return itemsLen;
        }, 5000 );

        runs(function(){

            expect( itemsLen ).toBe( 3 );
        });
    });

    it( 'regex', function(){

        var itemsLen = 0;

        runs(function (){

            Item.find({ title: { $regex: /ell/i }}, function ( err, items ){

                itemsLen = items.length;
            });
        });

        waitsFor( function (){

            return itemsLen;
        }, 5000 );

        runs(function(){

            expect( itemsLen ).toBe( 1 );
        });

    });


});