{"id":89,"date":"2017-01-30T08:57:46","date_gmt":"2017-01-30T16:57:46","guid":{"rendered":"http:\/\/www.kenwalger.com\/blog\/?p=89"},"modified":"2017-07-09T22:19:15","modified_gmt":"2017-07-10T05:19:15","slug":"mongodb-crud-with-python","status":"publish","type":"post","link":"https:\/\/www.kenwalger.com\/blog\/nosql\/mongodb-crud-with-python\/","title":{"rendered":"MongoDB CRUD with Python"},"content":{"rendered":"

In my last post, we looked at how to combat Impostor Syndrome<\/em> and came to the conclusion that deepening our knowledge on a given topic helps to sharpen of knowledge sword to fight our feelings of self doubt. If you missed that post, take a look here<\/a>. This week let’s\u00a0take a look at using the NoSQL database MongoDB<\/a> with Python. In a related post<\/a>, I’ll show how to implement them into web frameworks.<\/p>\n

Planning<\/h3>\n

We will start with an exploration of CRUD operations in MongoDB<\/a> using Python and PyMongo<\/a>. Next, we’ll have a look at the Python web framework Bottle<\/a> and then use Bottle with MongoDB to generate a simple web site. Then we’ll spend a bit of time using MongoDB with the Django<\/a> web framework to generate a slightly more involved site than our Bottle version.<\/p>\n

In this post, we kick off this series with a simple discussion of how to do some simple CRUD operations in Python similar to my post for doing CRUD operations in Java<\/a>. Not familiar with CRUD? It stands for\u00a0C<\/strong>reate,\u00a0R<\/strong>ead,\u00a0U<\/strong>pdate, and\u00a0D<\/strong>elete. Those are the basic operations one will find themselves doing with\u00a0any<\/em> database, not just MongoDB.<\/p>\n

In December of 2016, MongoDB released a new version of their database, 3.4<\/a>, and I’m using 3.4.1 for this series of posts. While we aren’t going to go into any release specific features this week, we might in future posts, so I would encourage you to utilize the latest version. We will be touching on some of the features in the latest version of Python, 3.6<\/a>, later on as well so make sure you are utilizing that version as well.<\/p>\n

Python Driver – PyMongo<\/h3>\n

Okay, let’s concentrate on some basic implementations and general syntax of the Python driver for MongoDB as well as some basic database documents. Documents<\/a>, by the way, are similar to a SQL database record.<\/p>\n

The project code for this post will be available on GitHub and a link will be included at the end of the post. Let’s start off with our requirements.txt<\/code> file to list out our project dependencies:<\/p>\n

pymongo=='3.4.0'\n<\/pre>\n
With that in place we can do pip install -r requirements.txt<\/code> to install the required version of the libraries for our project.<\/p>\n
Another thing we will need for our project to work is a running instance of a MongoDB server. I am using version 3.4.1 and will assume that you have MongoDB 3.4 downloaded<\/a>, installed, and running on the default address of localhost<\/code> and port 27017<\/code>. Further, since we are just sharpening our sword of knowledge here and don’t need MongoDB server authentication, let’s assume that feature is turned off or not implemented at all on our server.<\/p>\n
Great, now that our environment is setup let’s enter into the planning stages a bit. What do we need to do?<\/p>\n