node.js基于mongodb的搜索分页示例

mongodb模糊查询并分页

1.建立数据库

代码如下：

var mongoose = require('mongoose');
var shortid = require('shortid');
var Schema = mongoose.Schema;

var IndexDataSchema = new Schema({
  _id: {
    type: String,
    unique: true,
    'default': shortid.generate
  },
  type: String,
  city: String,
  name:string,
  value: [{name: String, value: String}],
  create: {type: Date, default: Date.now},
  expand: String
});

IndexDataSchema.statics = {
  defaultSort: {'create': 1},
  defaultOptions: {'pageSize': 0}

};

var IndexData = mongoose.model('IndexData', IndexDataSchema);

module.exports = IndexData;

页面布局 这里只需要搜索框和搜索按钮，再点击按钮时，执行search()方法并发送请求

代码如下：

 <div class="searchPart">
          <input type="text" class="form-control" id="txtSearch" placeholder="请输入项目名称">
          <button class="btn btn-success search_btn" onclick="search()">搜索</button>
        </div>
        <script>
  var paginObj;

  //设置每页显示页码
  var pageSize = 20; 

  //设置当前页码为1
  var currentPage = 1;

  var condition = {'city': currentCityId, 'name': ''}
  jQuery(document).ready(function () {
    refresh();
  });

 //获取查找条件
  function getCondition() {
    var name = $('#txtSearch').val();
    if (name && name.trim()) {
    // {'$regex': name, '$options': 'i'}}为模糊查询固定语法，name为参数
      condition = {'city': currentCityId, 'name': {'$regex': name, '$options': 'i'}};
    }
    else {
      condition = {'city': currentCityId}
    }
    return condition;
  }

   //刷新页面
  function refresh() {

  //查找内容
    $.get('/Manage/list/projects', {
      'pageSize': pageSize,
      'currentPage': currentPage,
      'condition': getCondition()
    }, function (result) {
      appendData(result.data);
    })

//查找个数
    $.get('/Manage/listCount/projects', {'condition': condition}, function (result) {
      paginObj = new DataPagin(document.querySelector('.projects-list'), result.count, {
        'pageSize': pageSize,
        'changePageFun': rquestPageData
      });
    })
  }

//重新分页
  function rquestPageData(currentPage, callback) {
    $.get('/Manage/list/projects', {
      'pageSize': pageSize,
      'currentPage': currentPage,
      'condition': getCondition()
    }, function (result) {
      appendData(result.data);
    })
    if (callback) {
      callback();
    }
  }

//改变页码，显示相应的内容
  function changePage(paginObj, index) {
    paginObj.setPageNumber(index);
  }

  function appendData(data) {
    //debugger;
    var list = $('.projects-list').children('tbody');
    list.html('');
    // 页面显示模板
    for (var i = 0; i < data.length; i++) {

      .........
      //此部分自己定义

    })
  }

   //点击搜索按钮执行该方法
  function search() {
    currentPage = 1;
    refresh();
  }

</script>

到数据库查找并返回相应内容

 var formidable = require("formidable");
  var common = require('./common');
  var path = require("path");
  var fs = require('fs');
  var path = require('path');
  var guid = require('guid');
  var shortid = require('shortid');

  var AuctionHouse = require('./db/IndexData');

 var funs = {
  getList: function (collectionName, req, res, next) {
    var mainObj = transformCollctionName(collectionName);
    if (!mainObj) {
      next();
    }
    var options = req.query;
    var sort = options.sort || mainObj.defaultSort;
    var pageSize = options.pageSize || mainObj.defaultOptions.pageSize;
    var currentPage = options.currentPage || 1;
    var condition = options.condition || {}

    //此部分为查找条件
    mainObj.find(condition).sort(sort).skip((currentPage - 1) * pageSize).limit(pageSize).exec(function (err, docs) {
      if (err) {
        next(err);
      }
      return res.json(common.returnData(true, docs));
    })
  },
  countList: function (collectionName, req, res, next) {
    var mainObj = transformCollctionName(collectionName);
    if (!mainObj) {
      next();
    }
    var condition = req.query.condition || {}
    mainObj.find(condition).count().exec(function (err, docs) {
      if (err) {
        next(err);
      }
      return res.json({'count': docs});
    })
  },
  HandleEvent: function (collectionName, actionsName, req, res, next) {
    var mainFuns = getCollctionFuns(collectionName)
    if (!mainFuns) {
      next();
    }
    var fun = mainFuns[actionsName];
    if (!fun) {
      next();
    }
    fun(req, res, next);
  }

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