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Enough lecturing and talking.

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Let's go increase our actual user model.

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So back inside my code editor I'm going to find my off service directory.

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It is right here inside the NRC folder.

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I'm going to create another directory called models.

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And inside there I'll create a file called user dot.

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Yes.

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So this is where we are going to define our Mongoose user model.

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We're also going to write out some code inside of here to solve those two issues that we just discussed

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to get started at the very top.

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I'm going to import Mongoose from Mongoose after that.

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I'm going to define something called a schema a schema is how we are going to tell Mongoose specifically

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about all the different properties that a user is going to have.

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I'm gonna write out to user schema is new Mongoose dot schema and then sort of here again we're going

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to list out the different properties that a user is going to have.

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First off they're going to have an email I'm going to markets type as being a string and I'm going to

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say that this property is required required.

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True that quick little note in those we put a type right here and we said that its type was going to

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be string.

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This is not in any way shape or form.

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Not whatsoever tied to typescript the type that we are listing right here is 100 percent specific to

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mongoose.

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It does not tell typescript anything whatsoever.

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The other thing I want to mention is that when you put a type of string right here it is capital S string

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because we are referring to the built in string constructor that is available inside the javascript

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language whenever we write out a type of string using typescript.

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So for example if we wrote out an interface you're really quickly.

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And when it had some imaginary property that was of type String we'd write out lowercase string.

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So in typescript whenever we want to indicate a type of string it's lowercase with Mongoose when we

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indicate a type of a property it is a capital because we are referring to an actual constructor.

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So after that the other property we're going to eventually store on all these different users is a password.

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This will also be of type String and it will be also required

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all right.

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So that looks good.

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So now after creating that schema we can see the schema into Mongoose and mongoose is going to create

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a new model out of it.

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And remember this whole model thing is how we actually access a whole big set of data inside of our

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Mongo DB database so I can stay down here.

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The bottom line user is Mongoose dot model I'm gonna put in a string of user and then feed in the user

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schema like so then finally at the very bottom I'm going to export user

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okay.

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So this time well we wrote out all this code and everything appears to be working no without any issue

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whatsoever I don't see any typescript errors or anything like that.

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However if we start to really play around with this user model that we've now created you can really

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start to see where these two issues are going to start to cause us some problems.

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For example let's just try to create a new user so after creating the user model down here I'm going

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to say new user and I'll pass on some properties I want to assign to this user.

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Well naturally we probably want to have an email and a password so I could put in something like an

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email of test at test dot com and a password of whatever well that looks fine.

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We still don't see any errors from typescript or anything like that.

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However here's where stuff starts to go wrong.

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There is no information about the arguments that are going to be provided to this constructor being

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fed into typescript right now.

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So even though you and I know that we want to give that constructor an email and a password there are

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both strings because that's what we told Mongoose typescript has no idea that that is the case.

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So if I start to mangle these properties if I accidentally put in like just yes typescript says hey

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who cares.

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No issue whatsoever.

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We don't get any warnings going to get any errors.

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I can add in extra properties.

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No problem.

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I can even change this from a string to a number.

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Also no issue whatsoever so you can start to see it right away that typescript has no idea about what

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is going on with the arguments you're passing to this constructor the whole reason that we are using

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typescript is so that it can check stuff like this and make sure that we are not making silly typos

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or anything like that.

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So it would be great if we could somehow teach typescript about the different properties that were going

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to pass into this thing.

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So it can do some validation or something like that for us.

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All right so now that we understand the issue here let's take a quick pause and make the next video

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and start to discuss how we're going to get TypeScript and Mongoose to actually work together.