Retrieve a specific category within a method and then output the entire entity post adjustments

I need to sanitize the email in my user object before pushing it to my sqlite database. This is necessary during both user creation and updates. Here's what I have so far:

export const addUser = (user: CreateUser) => {
  db.prepare(sqlInsertUser).run(cleanEmail(user))
}

export const updateUser = (user: UpdateUser) => {
  db.prepare(sqlUpdateUser).run(cleanEmail(user))
}

type CreateUser = {
  email: string
  password: string
  permissionLevel?: number
}

type UpdateUser = {
  email: string
  password: string
}

Now, I'm working on:

const cleanEmail = (user: ?) => {
  user.email = user.email.trim()
  return user
}

However, I'm unsure of what type to assign to the 'user' parameter. How do I handle multiple types and return the updated object?

Is there a way to implement this effectively, even with additional types that all include the email property?

Answer №1

If you have a generic type that requires an email property as a string, you can use the following function:

function cleanEmail<T extends { email: string }>(user: T): T {
  user.email = user.email.trim();
  return user; // The return type is inferred as 'T'
}

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

How can I create an Array of objects that implement an interface? Here's an example: myData: Array<myInterface> = []; However, I encountered an issue where the error message "Property 'xxxxxx' does not exist on type 'myInterface[]'" appears

Currently, I am in the process of defining an interface for an array of objects. My goal is to set the initial value within the component as an empty array. Within a file, I have created the following interface: export interface myInterface{ "pictur ...

Error encountered: Imagemagick throwing a typeerror due to the inability to parse properties of undefined while trying to read 'convert

I'm currently working on developing a pdf conversion feature for my nestjs project. Unfortunately, I've encountered an error that reads as follows: TypeError: Cannot read properties of undefined (reading 'convert') I am pretty confiden ...

When trying to retrieve a value from a custom render function in React with TypeScript, an error occurs indicating that the value is not assignable to type 'ReactNode'

Recently, I attempted to develop a versatile swiper component using Next.js 13 (App Router) v13.4.12 along with TypeScript. However, I encountered an issue when trying to access data from the component props, which involves a custom function for rendering ...

What is the method for developing a Typescript-connected High-Order React Component with Redux?

I am looking to develop a React Higher-Order Component that can safeguard routes within my application from unauthorized users without an access token. I aim to use this HOC to wrap a Component like so in the parent component: <Route exact path ...

Prevent click events on disabled tabs in PrimeNG tabMenu

I am encountering an issue with PrimeNG's p-tabMenu when it comes to disabled menu items. For example, suppose I have a tabMenu with 4 sub tabs labeled AAA, BBB, CCC, and DDD. This is how the menuItems are set up in the TypeScript component: //.... ...

Issue encountered while executing ./node_modules/.bin/cucumber-js within GitLab CI

I've encountered an issue while setting up a continuous integration build for my node project. Despite the fact that npm run test runs smoothly in my local setup, I am facing an exception in GitLab CI. The error arises from the following test command ...

Using Node.js with Typescript and RedisJSON allows for a powerful and efficient

I've recently started delving into nodejs, typescript, and redis for programming. However, I've encountered an issue with redis: when defining a data interface to be stored in redis, the system throws errors as soon as I try to specify the data t ...

A step-by-step guide on bundling a TypeScript Language Server Extensions LSP using WebPack

Currently, I am working on a language server extension for vs-code that is based on the lsp-sample code. You can find the code here: https://github.com/microsoft/vscode-extension-samples/tree/master/lsp-sample My challenge lies in WebPacking the extension ...

Understanding Mongodb: the process of populating a schema that is referenced within another schema using an API

Looking to make adjustments to my Api in order to populate a referenced schema. Here's the schema I am working with: export const taskSchema = new Schema ({ user:{ type: String, required: true }, project: { type ...

Leverage the power of TypeScript by enabling the noImplicitAny flag when working

Currently, I am looking to activate the noImplicitAny flag in my compiler. My main issue lies with utilizing lodash/fp as there are no typings available at this moment. Due to this, the compiler is generating errors due to the absence of a definition file ...

Utilize array mapping to alter the complete object

In my project using TypeScript (Angular 2), I am working on creating a "reset" method for an object array: cars [ { id: 1, color: white, brand: Ford, model: Mustang, ... }, ... ] Users have the ability to modify these objects, ...

How to Utilize Class Members in a Callback Function in Angular 12 with Capacitor Version 3

When I click the "Device Hardware Back Button" using Capacitor 3.0, I'm trying to navigate to the parent component with the code below. The device back button is working correctly, but I'm facing an issue where I can't access class members i ...

Strategies for enhancing performance in an Angular 4 project

Currently, I am engaged in a project that involves utilizing Angular 4 for the front-end and PHP for the back-end with the support of an Apache server on Ubuntu 16.04 LTS. We have incorporated Node JS to facilitate the functionality of Angular. This raises ...

The step-by-step guide to fixing a Gigwage client eslint error using nestJS

Whenever I utilize the gigwage client for my services, I encounter the following eslint error: TS2742: The inferred type of 'findAll' cannot be named without a reference to '@gigwage/client/node_modules/axios'. This is likely not porta ...

Steps to activate a button once the input field has been completed

It's noticeable that the send offer button is currently disabled, I am looking to enable it only when both input fields are filled. Below, I have shared my code base with you. Please review the code and make necessary modifications on stackblitz 1. ...

Factory function in Angular for translating using arrow syntax

When I include TranslateModule using the following code: TranslateModule.forRoot({ loader: { provide: TranslateLoader, useFactory: HttpLoaderFactory, deps: [HttpClient] } }) where export function HttpLoaderFactory(http: H ...

Is there a way to conceal an element within a component based on the current component being used with the router?

I have managed to hide an entire component, but I am unsure of how to show or hide specific elements within a component. export class AppComponent { headerFooterVisible: boolean; constructor(private router: Router) { router.events.subscribe(e =&g ...

Guide on how to prevent click events when a checkbox is not selected in Angular 2

A click event is being used on a ul element with a checkbox below it. When the checkbox is checked, the list should be enabled and the click event should work. If the checkbox is unchecked, the list should be disabled and the click event should not work. ...

What is the procedure for inputting the settings for the export module in webpack?

I am currently working on setting up this webpack configuration file. However, I encountered an issue where the error message states that "any" is being used as a value instead of a type. How can I resolve this issue? module.exports:any = { ...

Angular is unable to iterate through a collection of ElementRef instances

My list of ElementRef contains all my inputs, but adding listeners to them seems to indicate that textInputs is empty even though it's not. @ViewChildren('text_input') textInputs!: QueryList<ElementRef>; ngAfterViewInit(): void { ...