夺命雷公狗---node.js---21之项目的构建在node+express+mongo的博客项目6之数据的遍历

首先还是来链接数据库，然后就查找，如下所示：

/**
 * Created by leigood on 2016/8/31.
 */



var express = require('express');
var router = express.Router();

//引入mongodb模块
var MongoClient = require('mongodb').MongoClient;
var DB_STR = "mongodb://localhost:27017/blog";//这里的是在mongodb下建立的库
var ObjectId = require('mongodb').ObjectId;  //这里主要是用来处理mongodb下id的

/* GET users listing. */
router.get('/', function(req, res, next) {
    MongoClient.connect(DB_STR,function(err,db){
        if(err){
            throw err;
            return;
        }
        var c = db.collection('category');
        c.find().toArray(function(err,desc){
            if(err){
                res.send(err);
            }
            res.render('Admin/category',{data:desc});
        });
    });

});

router.get('/add',function(req,res,next){
    res.render('Admin/category_add');
});
router.post('/add',function(req,res){
    var title = req.body.title;
    var sort = req.body.sort;
    //console.log(title+'-------'+sort);
    MongoClient.connect(DB_STR,function(err,db){
        if(err){
            throw err;
            return;
        }
        //此处的db，就是blog数据库
        var c = db.collection('category');
        c.insert({title:title,sort:sort},function(err,result){
            if(err){
                err.send(err);
            }else{
                res.send('添加分类成功 <a href="/Admin/category">查看列表</a>');
            }
        });
    });

});

router.get('/edit',function(req,res,next){
    res.render('Admin/category_edit');
});


module.exports = router;

然后就开始将数据遍历到前台模版上去即可。。。

<% include header.html %>
<% include left.html %>
            <!-- Right side column. Contains the navbar and content of the page -->
            <aside class="right-side">
                <!-- Content Header (Page header) -->
                <section class="content-header">
                    <h1>
                        分类列表
                        <small>分类</small>
                    </h1>
                    <ol class="breadcrumb">
                        <li><a href="index.html"><i class="fa fa-dashboard"></i> 管理中心</a></li>
                        <li class="category_list.html"><a href="index.html">分类</a></li>
                        <li class="active">分类列表</li>
                    </ol>
                </section>

                <!-- Main content -->
                <section class="content">

                    <div class="row">
                        <div class="col-md-12">
                            <div class="box">
                                <div class="box-header">
                                    <h3 class="box-title"></h3>
                                    <a href="/admin/category/add" class="btn btn-default pull-right">添加分类</a>
                                </div><!-- /.box-header -->
                                <div class="box-body">
                                    <table class="table table-bordered">
                                        <tbody><tr>
                                            <th style=" 10px">#</th>
                                            <th>分类</th>
                                            <th>文章数量</th>
                                            <th>排序</th>
                                            <th style=" 20%">操作</th>
                                        </tr>
                                        <% data.forEach(function(item,idx){ %>
                                        <tr>
                                            <td><%= idx+1 %></td>
                                            <td><%= item.title %></td>
                                            <td>15</td>
                                            <td><%= item.sort %></td>
                                            <input type="hidden" name="id" value="<%= item._id %>">
                                            <td>
                                                <a href="/admin/category/edit?id=<%= item._id %>" class="btn btn-default" title="编辑"><span class="fa fa-edit"></span> 编辑</a>
                                                <a href="/admin/category/edit?id=<%= item._id %>" class="btn btn-default" title="删除" onclick="return confirm('是否删除？');"><span class="fa fa-trash-o"></span> 删除</a>
                                            </td>
                                        </tr>
                                        <% }); %>
                                    </tbody></table>
                                </div><!-- /.box-body -->
                                <div class="box-footer clearfix">
                                    <ul class="pagination pagination-bg no-margin pull-right">
                                        <li><a href="#">«</a></li>
                                        <li><a href="#">1</a></li>
                                        <li><a href="#">2</a></li>
                                        <li><a href="#">3</a></li>
                                        <li><a href="#">»</a></li>
                                    </ul>
                                </div>
                            </div>

                        </div>
                    </div>
                </section><!-- /.content -->
                <% include footer.html %>

显示效果如下所示：