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In this video.

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Let's see how we can perform all the CRUD operations that is create, read, update and delete using

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Mongoose.

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Well, before we can do that, we need to perform two things.

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First step is we have connected to MongoDB.

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The next step is we need to create what is called schema and then after that we need to create what

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is called modal.

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These are the two things that you are going to work with any time you want to use Mongoose.

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So what is schema?

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So let's have a target here.

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What we want to do here is that we want to create a database for school and then for school we are going

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to create student or courses.

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So in that way we need to create a blueprint.

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How we can create instances, for example, instances of courses or students and save it into database.

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So back to the documentation, you can see that after it has been connected, then we create a schema

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to get what is called model and here we can use MongoDB method to get it done.

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So let's click on read documentation here and let's see the steps.

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Step number one is we need to create what is called schema.

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So let's click on defining schema, which is down here, which is this defining schema.

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So everything in Mongoose start with a schema and a schema maps to a MongoDB collection and defines

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the shape of the document within that collection.

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So the next step is the extruded schema for Mongoose and the define the blueprint down here.

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So let's do the same thing inside Visual Studio code.

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So how can we create schema for students?

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So here we go.

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We make use of student, then we add what is called schema to it and it's equal to new.

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Then we bring in Mongoose Dart schema as a function, and for this function we are going to pass in

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configuration.

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We're going to be the blueprints of how we can create students.

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So in here we pass in object, and inside here we need to specify the fields of the students.

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So in what case, let's say that for student, we need the name of the student, the city of the students,

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and let's say the course of the student, we need these three fields and this is what we want.

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So how can we specify it here?

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So inside the schema we need to provide the fields.

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The first one is name and name.

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You provide the kind of data types and in Mongoose we have couple of data types.

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So for the meantime, let me show you the first one is String and for Mongoose, all the data type start

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with the uppercase.

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For JavaScript, we start with word lua cases.

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So for mongoose, always uppercase if it's a number is going to be a number Boolean, Uppercase, Boolean

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and many more.

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And we know there are types so mongoose even extend the ties of the type that we can use.

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So if you go to the official documentation, then you click on schema type.

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Here, you're going to see all these schema types that we can use and here are examples of them we can

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use.

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String Number Data Buffer Boolean MCs, object ID Array, Decimal Map Schema.

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These are the common ones that we use string number dates, boolean arrays and sometimes we use map.

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Yeah.

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So these are the common ones that we are going to use a lot and I believe we are familiar with the other

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type when it comes to JavaScript.

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So the same thing being applied inside Mongoose.

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So here we go.

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So the first one we want to accept string of a name.

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And what about the city two, we also want to accept a string also.

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All right.

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The next one going to be the courses is going to be a ray.

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So you provide what is called array as that.

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So let's say courses and let's say that is a person married, let's say is married, let's add more

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fuel to it and we are going to use what is called boolean.

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And we can also provide the age of the students, which is a number.

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So you can see this is what.

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Destruction.

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So for this one, we have well-structured what document that we want to create as compared to normal

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MongoDB.

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There is no structure.

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We can just add anything we want and it will be saved into it.

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So with this one, if you are trying to save the command of student and the user provide a field which

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is not part of this one is not going to be saved, how awesome it is.

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So after that, we need to create what is called model.

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So let's get into that in the next video.