pymongo

content/pymongo-George_Kihara.md

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+---
+Title: Pymongo in mongoDB
+Tags: pymongo, python, mongodb
+Date: 2017-09-22 15:10:00
+Slug: pymongo
+Summary: A brief demo of pymongo in mongoDB
+Author: George Kihara
+email: [email protected]
+about_author: <p>A software developer at Cysect Solution and loves Python. Check out <a href="https://georgekihara.github.io/">George Kihara</a>
+---
+
+<img src="img/pymongo.jpeg" margin-left="30%" />
+
+Pymongo has become one of the easiest ways to store data from python-flask web apps.
+
+I'm sure nobody would want to stress up doing hard stuff if there are other easier means to do them.
+
+I discovered pymongo when i was developing a small website for a project in school, and after discovering how simple it is, i've been using it for my small projects.
+After going through this tutorial, I'm hoping you will feel the same.
+
+<h2><b>Prerequisites</b></h2>
+So to begin with, make sure you have the PyMongo distribution installed. In the python shell, run the following:
+
+``` python
+>>> import pymongo
+```
+I'm hoping that MongoDB instance is running on the default host and port. So if MongoDb is installed, you can start it:
+``` python
+$ mongod
+```
+<h2>Set up connection with Mongoclient</h2>
+After the prerequisites, the next step is to create a MongoClient to the running  mongod instance.
+```python 
+>>> from pymongo import MongoClient
+>>>client = MongoClient()
+```
+You can specify the host and port as follows:
+```python
+>>> client = MongoClient('localhost', 5000)
+#alternatively
+>>> client = MongoClient('mongodb://localhost:5000/')
+```
+
+Now that we are done with the necessary connections, lets get into the more interesting part:
+<h2> Creating a database</h2>
+With PyMongo you access databases using attribute style access on MongoClient instances, as follows:
+```python
+>>> db = client.database1
+#or if that does not work use the following
+>>> db = client['database1']
+```
+<h2> Creating a collection</h2>
+A collection is a group of documents that are stored in MongoDB, its the equivalent of a table in relational databases. To create the collection:
+```python
+>>> collection = db.collection1
+#using dictionary-style access
+>>> collection = db['collecion1']
+```
+
+<h2>Documents</h2>
+We represent data in MongoDB using JSON-style documents. In PyMongo we use dictionaries to represent documents. For example:
+```python
+>>> post = {"author": "George",
+...         "text": "My first tutorial",
+...         "tags": ["mongodb", "python", "pymongo"]}
+
+```
+<h2>Inserting a Document</h2>
+To insert a document into a collection we can use the insert_one() method:
+```python
+>>> posts = db.posts
+>>> post_id = posts.insert_one(post).inserted_id
+>>> post_id
+ObjectId('...')
+```
+
+
+
+ Thanks for going through my tutorial, I hope it will help you create better databases.
+ <p>For more information, you can visit <a href="http://api.mongodb.com/python/current/tutorial.html">MONGODB</a></p>
+ Bye!