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);
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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