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In this video.

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Let's finish up with the MVC design pattern.

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You may be thinking that this one is okay because now on a server file, we have few lines of code because

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now on a server file, we don't have the business logic.

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And again, if you are developing, let's say, small application, this one is okay.

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But let's say you are building enterprise application.

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You need to use what is called the MVC design pattern completely.

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So let's see how we are going to implement that.

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Great.

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So now inside the folder of the controller, it's time to work with it.

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So now let's locate the roots here.

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The responsibility of the root is to render a root, but not with the business logic.

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So looking at this one, our business logic is our handler.

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So what we are going to do is that we are going to extract this one from this function and then put

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it inside the controller, and that is it, because it's here that we are going to implement our business

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logic.

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For example, if employee has been registered, then we are going to throw an error that, hey, you

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have been registered and this is a business logic and this where the action is being taken.

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So let's get going.

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So inside the controllers, you are going to create a file for a specific model.

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Because for this one, we have only one model and that is the employee.

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So let's see how we are going to implement that.

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So I would name the file as a name of my model, and that is the employee controller.

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And then going to be dot g's.

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So like I say, we are going to extract this one.

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So again, we are moving this one from here again.

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And now let me cut it and I'm back to the end controller.

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I will pass it.

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Now you can see how we are moving this function from the server file to route and now to the controller.

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It means that this function is tired about moving around.

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All right, guys, so let's continue to finish up this.

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So here we are going to create a function and assign this function to it, and that is it.

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And lastly, we are going to export it.

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So here we go.

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Let's have some space and let's make a function counts as create an employee.

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And our ad controller tweet is equal to that.

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Now, I've done this, my controller function.

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So now if I save this one and I make a request to create, let's see the error.

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You can see that there is no right for that because on the router we don't have the logic or the handler.

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So we need to require the handler here.

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So we need to export this one from this file.

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And remember, this file is going to contain all the operation for the employees.

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So we are going to export this one as an object and going to be key and value per.

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And I would like to use the key as a value, so I will maintain one as the create employee controller.

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Save it.

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Now let's get back to the router and now let's require the controller.

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And here you go, I have the auto import.

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Lastly, I need to bring in here as a second element to this function call and that is it.

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So let me save it and let me hit send.

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And now everything works fine.

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So if you want to give us a challenge, I advise you to refactor the rest of the route to use the MVC

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design palette.

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You can put this video and give it a shot.

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Great.

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Again, we are going to catch the handler from here.

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And now back to the file.

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Let me pass it here.

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So the first one is let me add a comment.

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Say, great.

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And here is going to be as fetch.

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All right.

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Yeah, fetch or let me see all employees and cons going to be get and implore.

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Gees meaning poorer.

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I'm going to add as comptroller and I'll pace that and I'm done and our export this one as get employees

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and here I need to extract or pull out that controller and that is gets employees so here I'll pass

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in here as a second agreement as get employees.

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Great.

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Next step is going to be the update.

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So our card is one from here.

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And now here we go.

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So I have a comment as update and cost update employee that is singular controller.

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And then here I'll that and that is it.

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So let me collapse this one and this and now let's work on this one.

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So let me export the update.

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And now here, let's require it here as.

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I did and let me pass in here on the second argument as update next one going to be the delete.

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So I'll cut this one from here.

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And now let's get back to the employees.

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And now let me have a comment.

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You're going to be as I forgot is delete.

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All right, guys.

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So delete and I'm going to be as concerned.

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Delete.

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Employee.

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Controller is equal to the handler and that is it.

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Collapse it and let's export that one.

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And here we go.

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So here let's require the delete and that is it.

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Next one is going to be fixed single.

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So our Kurdistan from here and now back here is going to be details and going to be us get employee

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for singular.

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Controller is equal to the callback function and that is it.

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And let me export this one from here as gate employee, which is this.

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So here lets require the gate employee.

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Great.

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So now let's pass the delete here as delete and here as gets come and gets employee save it.

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And now let's test all the endpoint guys.

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First one is create a great or a it works update a it works delete a it works single a it works.

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So guys here and the complete MVC design pattern and we're happy to finish out this section because

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this one is really important as Node.js developer.

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Great.

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So now we don't have the actual logic, but the design pattern is complete.

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What has left is to fill up the controller with a rare logic.

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So the next video will go ahead and then register employee using our model.

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And we are going to fetch all we are going to update, we are going to delete and you are going to find

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single employee.

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Let's get into that the next video.