What are the key differences between creating models in Angular 2 and dynamically manipulating JSON objects?

Question

What are the key differences between creating models in Angular 2 and dynamically manipulating JSON objects?

It's a common question among Angular 2 developers: when working with a REST API, should you create TypeScript classes for each object (like employee, company, project, user) or just work with the JSON objects as they come in?

rest angular typescript single-page-application

Answer 1

Answer №1

It is highly recommended to utilize models for the following reasons:

Your code will become more legible both for yourself when revisiting it, as well as for others who may need to understand your work.
Making modifications to the project will be simpler. For instance, 'obj[0]' is ambiguous whereas 'obj['username']' provides clearer context.
You will benefit from intellisense in your IDE.
You can incorporate logic into the model, thus keeping your controller leaner.
```
name: string
age: number

sayInfo(): string {
  return `name is ${this.name} and age is ${this.age}`
}
```
Overall, managing your app will be less stressful (or at least less hectic) :D

Remember that a "fat models thin controllers" approach is advisable.

Keep in mind that passing more than five arguments to a function is not considered good practice. Instead, use an object like so:

constructor(file) {
  this.id = file['id']
  this.fileName = file['fileName']
  this.extension = file['extension']
  this.fileSize = file['fileSize']
  this.permission = file['permission']
  this.description = file['description']
  this.password = file['password']
  this.isFolder = file['isFolder']
  this.parent = file['parent']
  this.banStatus = file['banStatus']
  this.tinyLink = file['tinyLink']
  }
  getName(): string {
    return `${this.fileName}${(this.isFolder) ? '' : '.'}${this.extension}`
  }
  getIcon(): string {
    return this.isFolder ? 'fa-folder' : 'fa-music'
  }

Answer 2

It is highly recommended to utilize models for the following reasons:

Your code will become more legible both for yourself when revisiting it, as well as for others who may need to understand your work.
Making modifications to the project will be simpler. For instance, 'obj[0]' is ambiguous whereas 'obj['username']' provides clearer context.
You will benefit from intellisense in your IDE.
You can incorporate logic into the model, thus keeping your controller leaner.
```
name: string
age: number

sayInfo(): string {
  return `name is ${this.name} and age is ${this.age}`
}
```
Overall, managing your app will be less stressful (or at least less hectic) :D

Remember that a "fat models thin controllers" approach is advisable.

Keep in mind that passing more than five arguments to a function is not considered good practice. Instead, use an object like so:

constructor(file) {
  this.id = file['id']
  this.fileName = file['fileName']
  this.extension = file['extension']
  this.fileSize = file['fileSize']
  this.permission = file['permission']
  this.description = file['description']
  this.password = file['password']
  this.isFolder = file['isFolder']
  this.parent = file['parent']
  this.banStatus = file['banStatus']
  this.tinyLink = file['tinyLink']
  }
  getName(): string {
    return `${this.fileName}${(this.isFolder) ? '' : '.'}${this.extension}`
  }
  getIcon(): string {
    return this.isFolder ? 'fa-folder' : 'fa-music'
  }

What are the key differences between creating models in Angular 2 and dynamically manipulating JSON objects?

Answer №1

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