Application Overview

State Management

What is MobX State Tree?

What will you learn in this course?

Will this course be for you?

Introduction

The Tree in MobX State Tree

The Store Model

Types

Model Actions

Model Views

Snapshots

Identifiers and References

Asynchronous Actions

Lifecycle Hooks

Concepts

Arrays in MobX State Tree

Maps

Nesting Stores

Optimistic Updates

Time Travel

Advanced Concepts

Overview of React and MobX State Tree

Context and Hooks

Observable

React

Overview

Building Voyager

mobx-state-tree

In this course, we will create a complete React Application with the state management handled by MobX State Tree, a state container system that is built on MobX, a functional reactive state library.

MobX State Tree will give your application a solid structure and foundation for large-scale applications and for small applications that are expected to scale rapidly. In comparison to Redux, MobX State Tree outstands it in performance with much less boilerplate. MobX is one of the most popular Redux alternatives and it's used by companies all over the world, including Netflix, Grow, IBM, DAZN, Baidu, and more.

During this course, you'll learn:

* Types in MobX State Tree.
* How to create the architecture of a centralized store.
* How to mutate the state via actions that could be asynchronous or not, depending on if we need to perform network requests to persist data into a database via GraphQL.
* Understanding snapshots and how we can benefit from them to time-travel if a network request fails.
* Understanding how MobX State Tree makes use of observable properties and observers.
* Leveraging re-renders in your React Application to MobX observers for better performance optimizations.

By the end of this course, you will have the knowledge and skills that it takes to build a real-world, production-level React Application with a State Management with top-notch performance that can scale with ease.

In this course, we'll show you how to build a React App with MobX State Tree.

The newline Guide to Building a React App with MobX State Tree

How to integrate MobX State Tree within your React App

Dealing with asynchronous flows and time travel to preserve state on networking errors

How to create a scalable store using MobX State Tree

---
title: The Store Model
slug: the-model-in-mobx-state-tree
description: Introduction to the store model of MobX State Tree
role: "LESSON"
isPublicLesson: false
privateVideoUrl: https://fullstack.wistia.com/medias/gkgud0myqh
---

# The store model in MobX State Tree

The core feature of MobX State Tree and the most important type is **model**. A model can be used to describe the shape of a store.

MobX State Tree allows you to give the model a name for debugging purposes and it is strongly advised that you do so, so you can easily track possible errors at development time.

The model type takes two arguments:

1.  The debugging name of the model.
2.  The model properties.

## Model description

Lets take a look at a very simple example of a MobX State Tree store

```js { actualFilename=src/model-description.js endChar=181 endLine=8 startChar=0 startLine=1 statedFilename=src/model-description.js url=https&#x3A;//gitlab.com/fullstackio/books/newline-guide-to-building-a-react-app-with-mobx-state-tree/module_01/lesson_01.02/src/model-description.js }
import { types } from "mobx-state-tree";

const UserStore = types.model("UserStore" /* 1 */, {
  name: types.string, // 2
  lastName: "Casillas", // 3
  age: types.number, // 4
});
```

1.  The debugging name of the store.
2.  A type. In this case we have a `string` type, a simple MST primitive type.
3.  A type. In this case we have provided a string, and MST will infer the type `string` automatically for you.
4.  A type. In this case we have a `number` type, a simple MST primitive type.

MobX State Tree has a large number of types that can be used in many different scenarios; but in this case, for the sake of simplicity, we just use two of the primitive types. We will get into advanced and complex types later on.

## Chainable model

The `types.model` creates a chainable model type where each chained method produces a new type as follows:

-   `.named(name)`: this method clones the current model type but with a new name.
-   `.props(props)`: this method produce a new type based on the current one, and adds or overrides the specified properties.
-   `.actions(self => actions)`: this method produce a new type based on the current one, and adds or overrides the specified action functions.
-   `.views(self => views)`: this method produce a new type based on the current one, and adds or overrides the specified view functions.


Introduction to the store model of MobX State Tree

Learn

The newline Guide to Building Your First GraphQL Server with Node and TypeScript

Teach

Amelia Wattenberger

Author of Fullstack D3

Community

The newline Guide to Building a React App with MobX State Tree

Module 1: Introduction

Introduction:

Start Here

Introduction: (0:42)

Application Overview

Introduction:

State Management

Introduction:

What is MobX State Tree?

Introduction:

What will you learn in this course?

Introduction:

Will this course be for you?

Module 2: Concepts

Lesson 1:

The Tree in MobX State Tree

Lesson 2: (1:44)

The Store Model

Lesson 3:

Types

Lesson 4: (2:38)

Model Actions

Lesson 5:

Model Views

Lesson 6:

Snapshots

Lesson 7:

Identifiers and References

Lesson 8:

Asynchronous Actions

Lesson 9:

Lifecycle Hooks

Module 3: Advanced Concepts

Lesson 1:

Arrays in MobX State Tree

Lesson 2:

Maps

Lesson 3:

Nesting Stores

Lesson 4:

Optimistic Updates

Lesson 5:

Time Travel

Module 4: React

Lesson 1:

Overview of React and MobX State Tree

Lesson 2:

Context and Hooks

Lesson 3:

Observable

Module 5: Building Voyager

Lesson 1:

Overview

The Store Model