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pymongo and mongoengine tutorial on ubuntu 16.04

Guide

version

mongo 2.6.10
mongo gui: robo3t-1.3.1
pymongo 3.9.0
MongoEngine 0.18.2

install mongodb

sudo apt-get install -y mongodb

mongo shell

mongo --host mongodb0.example.com --port 27017

mongo --version

MongoDB shell version: 2.6.10

see mongo shell

> mongo

# show all dbs

> show dbs

# display current db

>db

test (default database)

# switch or create db

> use mydb

> db.help()

> show collections

posts

system.indexes

> db.posts.help()

> db.posts.find()

help on db and collections

>db.dropDatabase()

>db.posts.drop()

>db.copyDatabase("mydb","backup_mydb")

mongo gui

Robomongo offically changed it's name and released two different products Studio 3T and Robo 3T. Old robomongo is now called Robo 3T. Studio 3T is for professionals.

wget https://download-test.robomongo.org/linux/robo3t-1.3.1-linux-x86_64-7419c406.tar.gz

vim .bashrc

export PATH=/home/kezunlin/program/robo3t/bin:$PATH

allow mongodb to access from remote.

vim /etc/mongodb.conf

#bind_ip = 127.0.0.1

bind_ip = 0.0.0.0

by default, mongodb only allow to access from local.

restart mongodb again

 > sudo service mongodb status

 mongodb.service - An object/document-oriented database

   Loaded: loaded (/lib/systemd/system/mongodb.service; enabled; vendor preset: enabled)

   Active: active (running) since 四 2019-09-26 16:11:03 CST; 7s ago

     Docs: man:mongod(1)

 Main PID: 4917 (mongod)

    Tasks: 10

   Memory: 3.0G

      CPU: 70ms

   CGroup: /system.slice/mongodb.service

           └─4917 /usr/bin/mongod --config /etc/mongodb.conf

9月 26 16:11:03 node17 systemd[1]: Started An object/document-oriented database.

9月 26 16:11:03 node17 mongod[4917]: warning: bind_ip of 0.0.0.0 is unnecessary; listens on all ips by default

access from remote now

robo3t

python mongodb

pip install pymongo

pip install mongoengine

One library that provides a higher abstraction on top of PyMongo is MongoEngine. MongoEngine is an object document mapper (ODM), which is roughly equivalent to a SQL-based object relational mapper (ORM). The abstraction provided by MongoEngine is class-based, so all of the models you create are classes.

pymongo

def test_mongo_client():

    from pymongo import MongoClient

    client = MongoClient('localhost', 27017)

    db = client['mydb']

    posts = db.posts

    post_data = {

        'title': 'Python and MongoDB',

        'content': 'PyMongo is fun, you guys',

        'author': 'Scott'

    }

    result = posts.insert_one(post_data)

    print('One post: {0}'.format(result.inserted_id))

    post_1 = {

        'title': 'Python and MongoDB',

        'content': 'PyMongo is fun, you guys',

        'author': 'Scott'

    }

    post_2 = {

        'title': 'Virtual Environments',

        'content': 'Use virtual environments, you guys',

        'author': 'Scott'

    }

    post_3 = {

        'title': 'Learning Python',

        'content': 'Learn Python, it is easy',

        'author': 'Bill'

    }

    new_result = posts.insert_many([post_1, post_2, post_3])

    print('Multiple posts: {0}'.format(new_result.inserted_ids))

    # find one

    bills_post = posts.find_one({'author': 'Bill'})

    print(bills_post)

    # fine many

    scotts_posts = posts.find({'author': 'Scott'})

    print(scotts_posts)

    for post in scotts_posts:

        print(post)

    client.close()

mongoengine

from mongoengine import *

def test_mongo_engine():

    # define collection

    class Post(Document):

        title = StringField(required=True, max_length=200)

        content = StringField(required=True)

        author = StringField(required=True, max_length=50)

        published = DateTimeField(default=datetime.datetime.now)

    connect('mydb',

        host='localhost',

        port=27017,

        alias="default" # must be `default`

    )

    # mongoengine.connection.MongoEngineConnectionError: You have not defined a default connection

    post_1 = Post(

        title='Sample Post',

        content='Some engaging content',

        author='Scott'

    )

    post_1.save()       # This will perform an insert

    print(post_1.title)

    print(post_1.id)

    post_1.title = 'A Better Post Title'

    post_1.save()       # This will perform an atomic edit on "title"

    print(post_1.title)

    print(post_1.id)

    disconnect(alias='default')

test_mongo_engine()

Reference

History

20190926: created

Copyright

Post author: kezunlin
Post link: https://kezunlin.me/post/e88f04e5/
Copyright Notice: All articles in this blog are licensed under CC BY-NC-SA 3.0 unless stating additionally.

巴特西

pymongo和mongoengine安装和使用教程包含常用命令行和代码示例 | pymongo and mongoengine tutorial on ubuntu 16.04

Guide

install mongodb

mongo shell

mongo gui

python mongodb

pymongo

mongoengine

Reference

History

Copyright

最新文章

热门文章

巴特西

pymongo和mongoengine安装和使用教程 包含常用命令行和代码示例 | pymongo and mongoengine tutorial on ubuntu 16.04

Guide

install mongodb

mongo shell

mongo gui

python mongodb

pymongo

mongoengine

Reference

History

Copyright

最新文章

热门文章

pymongo和mongoengine安装和使用教程包含常用命令行和代码示例 | pymongo and mongoengine tutorial on ubuntu 16.04