{"id":10308,"date":"2019-11-04T08:30:36","date_gmt":"2019-11-04T07:30:36","guid":{"rendered":"https:\/\/rubikscode.net\/?p=10308"},"modified":"2019-11-03T19:05:40","modified_gmt":"2019-11-03T18:05:40","slug":"using-mongodb-in-python","status":"publish","type":"post","link":"https:\/\/rubikscode.net\/2019\/11\/04\/using-mongodb-in-python\/","title":{"rendered":"Using MongoDB in Python"},"content":{"rendered":"\n

In our Definite Guide to MongoDB<\/strong><\/a>, we covered a lot of ground. There you can get more information about NoSQL <\/strong>databases, what they are, how they can be used, and which are the benefits <\/strong>of using one. Apart from that, you can find more information about different types <\/strong>of NoSQL databases and their most popular representatives<\/strong>. One of those types are so-called Document <\/strong>NoSQL databases and their most popular representative is MongoDB<\/strong><\/a>. <\/p>\n\n\n\n

So, we went on and covered some of the foundations <\/strong>of this database. There one can learn how to install MongoDB<\/em>, create databases, collections, documents and how to use these entities. Also, there is a lot of information about MongoDB <\/em>deployment<\/strong>, shards, replica sets and how to manipulate them. You can find out how to use <\/strong>this database in .NET environment, in JavaScript MEAN framework and in Serverless <\/em>environment too. So we wanted to build up on that and write an article that will cover how you can use MongoDB <\/em>in Python<\/strong><\/em>.<\/p>\n\n\n\n

In this article, we implement one repository<\/strong>, using which you can manipulate data in the collection Users<\/em>. Something similar we have done in .NET in the <\/strong>Definite Guide to MongoDB<\/strong><\/a>. In fact, we present two ways<\/strong> to achive that, ie. using two Python<\/em> modules – PyMongo <\/em>and MongoEngine<\/em>. The implementation with first library PyMongo<\/em> is low-level<\/strong> implementation, while the implementation with MongoEngine<\/em> can be observed as higher-level<\/strong> implementation. However, before we get into nitty-gritty details of each implementation, let’s first install <\/strong>MongoDB<\/em> and both Python<\/em> modules.<\/p>\n\n\n\n

Prerequisites<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

MongoDB <\/em>is free and open-source<\/strong>. It can be downloaded from\u00a0here<\/a><\/strong>. After picking up version and your operating system<\/strong>. In this example, we use MongoDB 4.2.1 Comunity Server<\/em> for Windows<\/em>.<\/p>\n\n\n\n

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MongoDB Download Page<\/figcaption><\/figure><\/div>\n\n\n\n

After installation, a\u00a0user can run MongoDB <\/em>server by using the command<\/strong>:<\/p>\n\n\n\n

mongod –dbpath PATH_TO_THE_DIR<\/p>\n\n\n\n

With this installation, MongoCompass<\/em> is installed as well. That is visual GUI <\/strong>component, using which you can manipulate your databases, collections and documents:<\/p>\n\n\n\n

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MongoDB Compass<\/figcaption><\/figure><\/div>\n\n\n\n

For the purpose of these examples, we use local<\/em> database and user<\/em> collection:<\/p>\n\n\n\n

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‘User’ Collection<\/figcaption><\/figure><\/div>\n\n\n\n

As we mentioned you are going to need two Python<\/em> modules, so let’s install them. First you can install PyMongo<\/em> like this:<\/p>\n\n\n\n

pip install pymongo<\/p>\n\n\n\n


After that MongoEngine<\/em>:<\/p>\n\n\n\n

pip install mongoengine<\/p>\n\n\n\n


And that is pretty much it. We are ready for implementations.<\/p>\n\n\n\n

PyMongo Implementation<\/h2>\n\n\n\n
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Let’s implement UserRepository<\/em> class is using PyMongo <\/em>module. To be more precise, we need just one class <\/strong>from this module – MongoClient<\/em>:<\/p>\n\n\n