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MongoDB Setup
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00:00:02 Now is the time to set up our database.
00:00:04 You could use something older like Postgres or maybe something modern like Neon, which is a serverless platform that allows you to host Postgres databases online.
00:00:14 Then you could hook it up with an ORM like Drizzle and it would all work.
00:00:18 But in this course, I'll use MongoDB Atlas.
00:00:21 allowing us to very easily create our database and host it on the cloud, completely for free.
00:00:27 Now, it is important to mention that up to this point, this course was completely database agnostic, which means that the concepts we learned could be
00:00:35 applicable to any database.
00:00:36 And if you wanted to use SQL, that's totally okay.
00:00:40 I would still say follow through with the video, watch me implement MongoDB in a non-SQL database, See how it all works.
00:00:49 And then later, try to modify it on your own and switch it to an SQL database.
00:00:54 You'll learn so much more that way.
00:00:56 Or maybe in the future, I split this video in two and build it with other databases in mind as well.
00:01:02 Who knows?
00:01:03 But for the time being, head over to MongoDB Atlas and click try free.
00:01:07 Create your account.
00:01:09 And once you're in the dashboard, create a new project.
00:01:12 Name it something like subscription tracker.
00:01:17 Click Next, make yourself the project owner, and when you click Create, it'll take some time, and then you'll have to create your database cluster,
00:01:25 basically your database.
00:01:27 Click Create, and choose M0, which is the free version, which gives you about half a gigabyte of storage, and trust me, that is more than enough for storing
00:01:36 JSON information.
00:01:37 The rest of the option is okay, so just click Create Deployment.
00:01:41 Now, this is very important.
00:01:42 You can choose your username.
00:01:44 I'll do jsm right here.
00:01:46 And then you'll also have to choose your password.
00:01:48 Make sure to write this password down as you'll need to use it later on within the code.
00:01:52 Click create and choose a connection method.
00:01:55 In this case, we'll connect through a MongoDB driver like Node.js.
00:01:59 So choose the first option and copy the installation command.
00:02:03 npm install mongodb.
00:02:05 Back in the code, you can open up a new terminal and run npm install mongoDB.
00:02:14 And let's also install mongoose, which is an ORM for mongoDB, allowing you to more easily create your database models and schemas and press enter.
00:02:23 While that is installing, let's wait for a cluster to provision.
00:02:27 Basically means your database is setting up.
00:02:30 We can go back and then click drivers one more time to see if it's provisioned.
00:02:34 If not, let's give it a minute.
00:02:35 Once that is done, you'll be given your connection string, which you can copy and add to your code base, but make sure to replace the DB password with
00:02:43 the original password for your username.
00:02:45 So back into the code, let me head over to our ENV development local and add new environment variables for our database.
00:02:55 I'll call it DBURI and simply paste the string that I just copied right here.
00:03:00 MongoDB, SRV, JSM.
00:03:03 And for my password, I chose just JSM as well.
00:03:07 Hopefully you chose something more secure.
00:03:09 Now we can head over into config envs and we can also export const the DBURI right here.
00:03:16 Once you've done that, create a new folder, which we can call database.
00:03:25 And within it, create a new file called mongodb.js.
00:03:32 Within it, we can import mongoose, coming from mongoose, and we can import the environment variables which we need.
00:03:40 So that's going to be the DBURI, as well as NodeENV, coming from dot dot slash config, forward slash ENV dot JS.
00:03:50 We can first check if there is no DBURI, Then we can throw a new error, something like throw new error, please define the MongoDB URI environment variable
00:04:06 inside .env.local.
00:04:08 And of course, this is .env.
00:04:11 either development or production local.
00:04:16 So I'll make it super specific, just so we know that it has to be .env.
00:04:21 and then development production.local.
00:04:24 If we pass that if statement, that means that we are ready to connect.
00:04:27 So let's say const connectToDatabase and that'll be equal to an asynchronous function, which has a try and a catch block.
00:04:39 In the catch, we get an error and obviously something went wrong.
00:04:43 So let's simply console log that error saying error connected to database, show that error, and then exit the process with a code of one,
00:04:53 which means failure.
00:04:54 But we're trying to make something go right.
00:04:56 And that something is a wait.
00:04:59 mongoose.connect.
00:05:01 And we simply want to connect to this specific DBURI, which we got from MongoDB Atlas.
00:05:07 And I believe that's it.
00:05:08 We don't have to pass anything else.
00:05:10 Now we have to call this function from somewhere.
00:05:13 So let's export it by saying export default connected database.
00:05:17 And let's head over into the app.js.
00:05:21 Where do you think we'll call it?
00:05:23 Well, right here within app.listen, as soon as we start our application on localhost something, we can also try to connect to database,
00:05:35 make sure to import this function from the top, await it because it is an asynchronous function, and therefore you have to make this one asynchronous as well.
00:05:44 If you've done that correctly, and if you head over into connect to MongoDB, Alongside this await, once we pass it, we can also console log something.
00:05:56 Maybe something like console logged, connected to database in NodeENV mode.
00:06:03 So this is going to be either production or development.
00:06:06 So now, if you open up your terminal, you can see subscription tracker API running on, connected to database in undefined mode.
00:06:14 Oh, that's definitely not good, but I think I know why that is.
00:06:18 We have only defined it in production, but I'll also add it to development right here under environment, and I'll say noDNV is equal to development.
00:06:29 If I do it like that, make a change to any file and save, it'll say connect to the database in development mode, which is exactly what we wanted.
00:06:38 Great.
00:06:39 Now that we have the routes and the database, let's go ahead and create some models.