To open up the Mongo Shell, you open another command line window and run mongo. One way to add items to a MongoDB database is through the Mongo Shell. Each collection can only contain one type of data.įor example, one collection can be used for books, one collection for users, one collection for toys, and so on. You have an unlimited supply of boxes in each room. You can store as much information as you want. Each database is responsible for storing information about one application. It contains many rooms.Įach room is a database. To make it easier to understand, you can think of MongoDB as a building. Each database contains multiple collections. MongoDB lets you store things (called documents) inside databases. Keep the mongod window running when you want to work with your local MongoDB. You can start MongoDB on your computer with the mongod command. You should get a response similar to the following: mongo - version Starting MongoDB Once you have completed the installation process, try typing mongo -version into your command line. You can install MongoDB by following these instructions ( Mac and Windows). You need to install MongoDB on your computer before you can connect to it. Today, I want to share how to create and connect to a local MongoDB Database. And I like to connect to a database on my computer because it speeds up dev and test-related work. Finally, we identified and defined the components of a connection string.I always use MongoDB as a database when I work on an app. Next, we located our connection string in Atlas. Then you learned that there's two formats to the connection string in MongoDB: the standard format and the DNS seed list format. First, you learned what the MongoDB connection string is. To summarize, here's what you learned in this video. MongoDB has options for just about anything that you need when it comes to connecting to a database. This tells MongoDB drivers to automatically retry when certain types of write operations fail. In this connection string, retry writes are set to true. The final piece of the connection string contains any options that we want to include, such as the connection timeout, TLS and SSL, connection pooling, and read and write concerns. If the port number is not specified, MongoDB will default to port 27017. Next is the host and the optional port number to our database. Following the MongoDB prefix, there's the username and password that we created for our database in the Atlas Dashboard. The srv addition automatically sets the TLS security option to true and tells MongoDB to use the DNS seed list. The connection string from the Atlas Dashboard uses a DNS seed list entry which has a list of host behind it that we can connect to. It begins with a required prefixed mongodb that identifies it as a MongoDB connection string. At first glance, the connection string appears to be a very long string of characters but we can actually break it down into separate components. In the bottom portion of the modal, you'll find the connection string which we'll use to connect to MongoDB. In the modal box that comes up, you'll find step by step instructions for connecting to your MongoDB instance. Let's go ahead and click on Connect your application. For all three of these options, you'll get similar connection strings. This will bring up a modal box, which gives us options for connecting to this database through the MongoDB Shell, our application, or through MongoDB Compass. To see our connection string, we'll click on the Connect button for our cluster zero. Remember that if you're not on this page already, you can always click on the Database button in the left-hand menu to return to this page. First, we'll return to our database deployments page. Again, our goal here is to connect to our Atlas cluster. Before we go into the components that make up the connection string, let's first locate the connection string in our Atlas Dashboard. This gives us a lot more flexibility with our deployment and the ability to change servers in our rotation without reconfiguring any of our clients. It allows us to provide a DNS server list to our connection string. The DNS seed list format was released in MongoDB 3.6. The standard format is used to connect to standalone clusters, replica sets, or sharded clusters. MongoDB provides two formats for the connection string: a standard format, and a DNS seed list format. For example, the connection string can be used to connect from the Mongo Shell, MongoDB Compass or any other application. It describes the host that we'll be using and the options for connecting to a MongoDB database. The MongoDB connection string allows us to connect to our cluster and work with our data. In this video, you'll learn how to use the MongoDB connection string, where to locate the connection string for an Atlas cluster and what the string consists of.
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