If you want to see what's in those documents, you use the find the function, db.demo.find. Any nested or embedded documents will not be shown here. Count function return the number of records or documents in that collection, so there are 100 of them, and only returns to tab level documents. You just type db using this JavaScript notation, so db. Now, we want to see how many records or documents in that demo collection. To show the collections inside this database, just type show collections again, and the current database has one collection called demo. To make these function calls in here, you cannot use the demodb directly as you see here. If you type db and hit "Enter", you see that has been changed to that as well. Now it says, we switched over to the demodb now. To use it, you just type the word use, space, followed by the name of that database, so demodb. We can just go and then go into that database. We have the demodb there, that's one that we did earlier. If you want to show what databases are currently in a Mongo database as an instance, you just type the word show and then D-B-S for databases, and you list there four of them, including the test, which we do not see here. To show the collections, you can type the word show, followed by the word collections, and it will tell you if there are any collections in this database. A database can exist without any data, and just to show that there is no data, that means there is no collection. The reason why you didn't see that in the list, is because it has no data. Now, in previous version of Mongo, I think version 3 or so, the local was the default database, but now it's the test. As you can see by default, it uses this database called test, which we did not see in a Mongo Compass earlier in the previous video. This is a special object that always points to the current database. One of the commands you want to use is called db. Here is the Mongo Shell version 4.2.6, we are now in Mongo Shell with the cursor blinking on the left here. To go into Mongo Shell, just type the word Mongo and hit "Enter". It just has a nicer interface, that's all.
Here, I'm using PowerShell, you can use any terminal command or interface is fine. Let's go over to the PowerShell interface and explore some of these commands. Although we won't be exploring all of them in this course, it's absolutely important and worthwhile to explore them and know their purpose. Here is a list of some of the most common collection methods used in most app developments. There are roughly about 250 or more Mongo Shell commands or functions that span over 14 different categories, including database, collection, cursor, and user, and so on. MongoDB also comes with an interactive JavaScript interface called Mongo Shell that lets you interact with MongoDB via the command line interface. Later, you will become familiar with building REST APIs with tools such as Postman and SoapUI.īy the end of this course, you will be able to successfully build secure web applications with the most advanced and updated JavaScript frameworks.
MONGODB COMPASS SHELL HOW TO
Further, you will learn how to use the front-end framework with Angular for building client applications and user interfaces.
MONGODB COMPASS SHELL CODE
You will understand how Node can be used to execute JavaScript code at the back end and the powerful applicability of Node when used with the Express framework and MongoDB. The course will begin with teaching you how to build your own application with plain JavaScript and the fundamentals of web development (HTML, CSS, and JavaScript). Given the ever-increasing demand for full-stack JavaScript developers, this course will help you master both front-end and back-end development.
It is an open-source JavaScript framework that harnesses four major technologies: MongoDB, Express, Angular, and Node.js. MEAN stack development is a modern approach to building dynamic web applications.
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