Ways to sort mat-select in alphabetical order with conditional names in options

Question

Ways to sort mat-select in alphabetical order with conditional names in options

I am looking to alphabetically order a mat-select element in my Angular project.

 <mat-select [(ngModel)]="item" name="item" (selectionChange)="changeIdentificationOptions($event)">
    <mat-option *ngFor="let item of items" [value]="item">
              {{ item.name ? item.name : item.identity }}
    </mat-option>
</mat-select>

In this case, the displayed option name is determined by whether each item has a name or identity. If there is a name, it will be shown, otherwise the identity will be used.

I came across a Stack Overflow post recommending a custom orderBy pipe for sorting options alphabetically Angular Material - dropdown order items alphabetically

However, this method sorts based on a single key. I lack experience in creating custom pipes. How can I adapt this approach to meet my specific requirements?

angular typescript angular-pipe

Answer 1

Answer №1

A more efficient approach would be to develop a reusable pipe that can be utilized across the entire project. Here's an example:

import { Pipe, PipeTransform } from '@angular/core';
@Pipe({  name: 'orderBy' })
export class OrderrByPipe implements PipeTransform {

    transform(records: Array<any>, args?: any): any {
        return records.sort(function(a, b){
            if(a[args.property] < b[args.property]){
                return -1 * args.direction;
            }
            else if( a[args.property] > b[args.property]){
                return 1 * args.direction;
            }
            else{
                return 0;
            }
        });
    };
}

You can then use it like this:

<mat-option *ngFor="let item of items | orderBy: {property: column, direction: direction}"" [value]="item">
   {{ item.name ? item.name: item.identity}}
</mat-option>

Note: column=> any property, direction(1 or -1) => for ascending/descending

Click here for additional details.

Answer 2

A more efficient approach would be to develop a reusable pipe that can be utilized across the entire project. Here's an example:

import { Pipe, PipeTransform } from '@angular/core';
@Pipe({  name: 'orderBy' })
export class OrderrByPipe implements PipeTransform {

    transform(records: Array<any>, args?: any): any {
        return records.sort(function(a, b){
            if(a[args.property] < b[args.property]){
                return -1 * args.direction;
            }
            else if( a[args.property] > b[args.property]){
                return 1 * args.direction;
            }
            else{
                return 0;
            }
        });
    };
}

You can then use it like this:

<mat-option *ngFor="let item of items | orderBy: {property: column, direction: direction}"" [value]="item">
   {{ item.name ? item.name: item.identity}}
</mat-option>

Note: column=> any property, direction(1 or -1) => for ascending/descending

Click here for additional details.

Answer 3

Answer №2

It is recommended that the data be sorted alphabetically from the backend source.

There is no 'orderBy' pipe available because the Angular team expects the data to already be sorted, as indicated in the documentation at https://angular.io/guide/pipes

Answer 4

It is recommended that the data be sorted alphabetically from the backend source.

There is no 'orderBy' pipe available because the Angular team expects the data to already be sorted, as indicated in the documentation at https://angular.io/guide/pipes

Ways to sort mat-select in alphabetical order with conditional names in options

Answer №1

Answer №2

Similar questions

Import JSON data into Angular 2 Component

.bail() function does not function properly when used in conjunction with express-validator

Nestjs RabbitMq Microservices

Set the variable value by clicking on another component within *ngFor in Angular 2

Implementing a SetTimeout Function in HTML

Unraveling the complexities of Typescript's Advanced Type NonFunctionPropertyNames

Signal a return type error when the provided element label does not correspond with an existing entity

Can you please provide a step-by-step guide for using socket.io with TypeScript and webpack, after installing it

Having trouble with updating operations in MEAN stack CRUD functionalities

ReactJS: A single digit input may result in the display of numerous '0's

Changing the second instance of a specific text in Angular

What steps can be taken to ensure the visibility and accessibility of two vertically stacked/overlapped Html input elements in HTML?

Resolve routing problems with lazy loading in Angular7

After being awaited recursively, the resolved promise does not perform any actions

What is the best way to implement ES2023 functionalities in TypeScript?

tips for concealing the shadow of a draggable div during the dragging process

A glitch was encountered during the execution of the ionic-app-scripts subprocess

Change the parent title attribute back to its original state

Having trouble reloading a seekbar (input range) in Angular 7 with a function?

Tips for utilizing Optical Character Recognition in Node.js with a buffer image: