00:00:02 Let's develop the question model.

00:00:05 Yeah, this one right here, containing the information about the author, as well as the timestamp, the number of answers,

00:00:12 the views, the title, the question itself, and the answers attached to it.

00:00:16 It has a lot of moving parts, making it maybe the most important model in our database.

00:00:22 So let's create it by creating a new file right here in our database folder called question.model.ts.

00:00:30 To get started with it, I'll just create a copy of the account model and paste it and delete the stuff that we don't need.

00:00:39 So here I will actually remove all the types and I'll call this iModel.

00:00:46 Then here I'm going to call this model schema.

00:00:50 I'll call this iModel.

00:00:52 I'll remove the entire definition from it.

00:00:54 And here I'll also use the iModel.

00:00:57 And here we can use the model schema.

00:00:59 And finally, we can rename this to model.

00:01:03 Now what you can do is basically copy this because we'll need to reuse it a couple more times.

00:01:08 And I'll call it template.model.ts and we can paste what we have here.

00:01:14 So we can quickly get a head start on creating all of these different models.

00:01:18 In this case, we'll use a question model.

00:01:20 So what you can do is basically do a CTRL F and then search for all instances of the word model, but make sure that you match the case as well.

00:01:31 So this will only match the uppercase model words, as you can see here.

00:01:35 I think the process should be somewhat similar on other IDEs.

00:01:39 And then we can rename this with a question model.

00:01:43 Replace all instances by clicking Replace All.

00:01:46 And now we see I question, question schema, I question, question, question, question, question.

00:01:53 So I think this is good.

00:01:54 Now let's start with creating the definition of the question.

00:01:58 It's going to have a title, which is going to be of a type string, and it'll be required.

00:02:04 Next, we're going to have the content of that question, which will be of a type string and required.

00:02:10 After that, we'll have to have the tags, which will actually be an array of references.

00:02:16 So we can set the type to be equal to schema dot types dot object ID, and it's going to be a reference to a tag collection.

00:02:26 You can see that if you go to our diagram as well, where we have a question, you can see the tags is an array.

00:02:32 We're going to also have the number of views attached to this question for our recommendation algorithm.

00:02:38 So let's set it to number, default at zero.

00:02:41 Let's do the same thing for upvotes.

00:02:44 Let's also do the same thing for downvotes.

00:02:47 And let's do the same thing for the number of answers.

00:02:50 So we're only going to keep track of the number, not directly referencing the answers within the question.

00:02:56 For that, we'll create a separate collection.

00:02:59 And finally, let's create a new author, which is actually gonna be a reference to a user model.

00:03:07 And we can make it required because you cannot create a question if you don't have a user.

00:03:12 And we can also define the types right now.

00:03:14 We're gonna have a title of a type string, content of a type string, tags will be an array of object IDs, views will be a number,

00:03:23 upwards will be a number, downwards will be a number, answers will be a number, and then the author, I believe is missing,

00:03:31 will be the object ID, which is a reference to the user.

00:03:34 And that's it.

00:03:35 This is our questions model.