mongoose v4.5.4 发布，让node.js更优雅的操作MongoDB

   <p style="text-align: center;"><img alt="" src="https://simg.open-open.com/show/8b6dbbafd94e5f9bf087b7a0b31ef2d4.jpg" /></p>    <p>Mongoose是MongoDB的一个对象模型工具，既类似ORM，让node.js操作MongoDB更加方便。</p>    <p>官方例子：</p>    <pre>  <code class="language-javascript">// 引入 mongoose 这个模块  var mongoose = require('mongoose');  // 连接对应的数据库：mongodb://localhost/test  mongoose.connect('mongodb://localhost/test');  // 创建了一个名为 Cat 的 model，mongoose 会将名词变为复数，在这里，collection 的名字会是 `cats`。  // model定义: 有一个 String 类型的 name  var Cat = mongoose.model('Cat', {name: String});  var kitty = new Cat({ name: 'Zildjian'});  // 调用 .save 方法后，mongoose 会去你的 mongodb 中的 test 数据库里，存入一条记录。  kitty.save(function (err) {    if (err) {      console.log(err);    } else {      console.log('meow');    }  });</code></pre>    <h2>更新日志</h2>    <ul>     <li>fix(types): fix removing embedded documents #4309 <a href="/misc/goto?guid=4958992033569553966">RoCat</a></li>     <li>docs: various docs improvements #4302 #4294 <a href="/misc/goto?guid=4958992033686937230">simonxca</a></li>     <li>fix: upgrade mongodb -> 2.1.21 #4295 #4202 <a href="/misc/goto?guid=4958992033569553966">RoCat</a></li>     <li>fix(populate): convert single result to array for virtual populate because of lean #4288</li>     <li>fix(populate): handle empty results for populate virtuals properly #4285 #4284</li>     <li>fix(query): dont cast $inc to number if type is long #4283</li>     <li>fix(types): allow setting single nested doc to null #4281</li>     <li>fix(populate): handle deeply nested virtual populate #4278</li>     <li>fix(document): allow setting empty obj if strict mode is false #4274</li>     <li>fix(aggregate): allow passing obj to .unwind() #4239</li>     <li>docs(document): add return statements to transform examples #1963</li>    </ul>    <h2>下载</h2>    <ul>     <li><a href="/misc/goto?guid=4958992033826788829" rel="nofollow"><strong>Source code</strong> (zip)</a></li>     <li><a href="/misc/goto?guid=4958992033944236870" rel="nofollow"><strong>Source code</strong> (tar.gz)</a></li>    </ul>    <h2> </h2>