January 12, 2021

Using Wrapper Class in Salesforce Lightning Web Component

Sample Code:

Apex Class:

public with sharing class AccountController {
 
    @AuraEnabled( cacheable = true )
    public static AccountWrapper fetchAccounts() {
        
        AccountWrapper wrap = new AccountWrapper();
        
        wrap.listAcc =  [ SELECT Id, Name, Industry, AccountNumber
                               FROM Account
                             LIMIT 10 ];
        
        wrap.accCount = wrap.listAcc.size();
        return wrap;
         
    }
    
    public class AccountWrapper {
        
        @AuraEnabled
        public List < Account > listAcc;
        @AuraEnabled
        public Integer accCount;
        
    }
     
}

HTML:
<template>

    <div class="slds-box slds-theme--default">
        <template if:true = {records}>          
            No of Accounts : {intCount}        
            <div style = "height: 300px;">
                <table class="slds-table slds-table_cell-buffer slds-table_bordered slds-table_striped">
                    <tr>
                        <th scope = "col">Name</th>
                        <th scope = "col">Industry</th>
                        <th scope = "col">Account Number</th>
                    </tr>
                    <template iterator:it = {records}>
                        <tr key = {it.value.Id}>
                            <td>{it.value.Name}</td>
                            <td>{it.value.Industry}</td>
                            <td>{it.value.AccountNumber}</td>
                        </tr>
                    </template>
                </table>
            </div>                  

        </template>      
        <template if:true = {error}>  
        {error}>                  
        </template>  
    </div>

</template>

JavaScript:
import { LightningElement, wire } from 'lwc';
import fetchAccounts from '@salesforce/apex/AccountController.fetchAccounts';

 

export default class Sample extends LightningElement {

    records;
    error;
    intCount

    @wire( fetchAccounts )  
    wiredAccount( { error, data } ) {

        if ( data ) {

            console.log( 'Data from Apex' + JSON.stringify( data ) );
            this.records = data.listAcc;
            this.intCount = data.accCount;
            this.error = undefined;

        } else if ( error ) {

            this.error = error;
            this.records = undefined;

        }

    }

}

JavaScript-meta.xml:

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>49.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__Tab</target>
    </targets>
</LightningComponentBundle>

Output:
 

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