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Welcome to the last section under MongoDB and Mongoose, and that is data modeling.

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What is it and why should we care about it?

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If you want to become a full stock developer or a back end developer, then this is the section that

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we need to pay attention to because any back end application or Fullstack application is all about data

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and understanding.

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This topic is not all that easy, so I advise you to take some notes as you move on.

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Like always, I'm going to make it pretty simple by using some diagram to show you the logic first.

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Then we get back to code to demonstrate all what you've learned.

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So what is data modeling?

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Let's understand that data modeling is the process of transforming real world ideas into data.

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What does it mean?

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It simply means that before you even start to develop a back end application, the first step you need

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to take into consideration is about data modeling.

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Because any application start with the idea.

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For example, if you are a developer and I'm a client, I come to you that place.

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I want this particular application and this is how I want it to be.

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So as a developer, you need to listen to your client how he wants the application to be, and you are

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going to transform those ideas into code to be more precise into data.

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For example, if I say that I want good management system and I want a situation whereby students can

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register, come pay school fees and many more, you are going to take this idea into data, and that

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is what we call data modeling.

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Based on my experience, this is the most difficult part as a back end developer because it's not all

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that easy to transform the client idea into reality.

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So as you move on this, what I'm going to show you the steps involved.

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So let's get going.

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And after that, we need to learn what is called database relationship.

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Well, database relationship is part of the data modeling.

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It simply means that how individual data are being related.

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Let's say that we have a block application and we have posts and users.

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If you want to know which user created a certain post or a post belongs to which user, and this is

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what we call database relationship.

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And for this one too, I'm going to take you through step by step.

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Well, so what is it?

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Technically, it refers to the relationship between different collections of data in MongoDB database.

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So like I said, there are database relationships simply means that how individual collections are related

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together.

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So I will show you more as you move on.

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So in a nutshell, data modeling is a process of transforming the ideas into database, the first step,

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and then to collection second step and to how the data are being collected together.

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And this is what we call data modeling in Mongoose.

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The objective for this section lies in this particular sentence here.

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So as we move on, I'm going to take you through how we are going to model data.

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In the next video.

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I will show you the process involved when it comes to data modeling.