Table of Contents
安装
使用pip安装
通过源代码安装
使用
连接服务器
定义数据模型
数据操作
Home Database Mysql Tutorial mongoengine教程(1)概述

mongoengine教程(1)概述

Jun 07, 2016 pm 04:34 PM
Tutorial Overview

MongoEngine是MongoDB的一个ODM(Object-Document Mapper)框架,它提供了类似Django的语法来操作MongoDB数据库。 安装 安装 MongoEngine 需要先安装 PyMongo。 使用pip安装 $ [sudo] pip install mongoengine 通过源代码安装 先从 PyPi 或者 Github 下载源代

MongoEngine是MongoDB的一个ODM(Object-Document Mapper)框架,它提供了类似Django的语法来操作MongoDB数据库。

安装

安装 MongoEngine 需要先安装 PyMongo。

使用pip安装

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$ [sudo] pip install mongoengine

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通过源代码安装

先从 PyPi 或者 Github 下载源代码。然后再进行安装。

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$ [sudo] python setup.py install

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使用

首先启动 mongodb 服务器:

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$ mongod

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连接服务器

使用 connect 方法进行数据库链接,与pymongo的用法相似,其参数可以是多种型式的。

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from mongoengine import connect

connect('project1')

connect('project1', host='mongodb://localhost:27017/test_database')

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从 MongoEngine 0.6 开始增加了多数据库的支持, connect 的第二个参数可以为每个链接设置一个别名。

定义数据模型

mongoengine的 Document 与django的 Model 相似。

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class User(mongoengine.Document):

    name = mongoengine.StringField()

    meta = {"db_alias": "default"}

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数据操作

数据的添加过程也与django相似:

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User.objects.create(name="test1")

User.objects.create(name="test2")

User(name="test3").save()

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查询数据:

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User.objects.filter(name="test2")

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删除数据:

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User.objects.filter(name="test2").delete()

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MongoEngine虽然提供了ODM,但是我们同样还是可以直接对数据库进行操作。
获取 pymongo 的 collection 对象:

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User.objects._collection

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然后就可以使用原生的pymongo操作了。

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