• mike smith 82112
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I can easily bulk load INSERT into a junction object without issues.

However, I want to (UPSERT) with the Bulk API 2.0, into a many-to-many JUNCTION object (Custom object with 2 master detail records).

However, it appears that I need to use a externalIdFieldName that is WITHIN the JUNCTION object.  It doesn't sound like I can use the Master Detail record references.

What are some suggestions on how to upsert into a junction object using the Bulk Api 2.0?

Some thoughts or work-arounds that are not good are:
1. Create a new field on the JUNCTION object that is an External ID, and is simply a concatonated STRING from both of the "External ID"s from the other two objects
2. First download all the ID's for the Master records on both sides of the many-to-many Junction object, and then use those to "upsert" if needed.

Any help is apprecitaed, Salesforce documentation on the Bulk Api 2.0 is lacking and misses any notes about JUNCTION objects.

Hi, I am new to LWC ​​​​​​, trying dynamically add/remove rows for a table scenario. I can able to add the row by click on the + button. After added that rows I want to enter some values in text boxes and save into account object by click on save buttton. Also do the delete action as well to delete the specific row by click on delete button. 

I am facing issue with save & delete records. How I can solve this? Can anyone give me some guidence to solve.


    <div class="slds-m-around--xx-large">
        <div class="slds-float_right slds-p-bottom_small">
            <h1 class="slds-page-header__title">Add Row
                <lightning-button-icon icon-name="utility:add"  size="large" variant="bare" alternative-text="Add" onclick={addRow}> </lightning-button-icon>
        <div class="container-fluid">        
            <table class="slds-table slds-table_bordered slds-table_cell-buffer"> 
                    <tr class="slds-text-title_caps">
                        <th scope="col">
                            <div class="slds-truncate">#</div>
                        <th scope="col">
                            <div class="slds-truncate" title="Account Name">Account Name</div>
                        <th scope="col">
                            <div class="slds-truncate" title="Account Number">Account Number</div>
                        <th scope="col">
                            <div class="slds-truncate" title="Phone">Phone</div>
                        <th scope="col">
                            <div class="slds-truncate" title="Action">Action</div>
                    <template for:each={accountList} for:item="acc" for:index="index">
                        <tr key={acc.Id}> 
                                <lightning-input label="Name" value={acc.Name} onchange={handleNameChange}></lightning-input>                               
                                <lightning-input label="Account Number" value={acc.AccountNumber} onchange={handleAccountNumberChange}></lightning-input>                        
                                <lightning-input label="Phone" value={acc.Phone} onchange={handlePhoneChange}></lightning-input>
                                <a onclick={removeRow}> 
                                    <lightning-icon icon-name="utility:delete" size="small" style="margin-top: -4px; margin-right: 0px;" ></lightning-icon>
                                    <span class="slds-assistive-text">Delete</span>
            <div class="slds-align_absolute-center slds-p-top_small">                
                <lightning-button name="Save" label="Save" onclick={saveRecord} ></lightning-button>


import { LightningElement, track,api } from 'lwc';
import ACCOUNT_OBJECT from '@salesforce/schema/Account';
import NAME_FIELD from '@salesforce/schema/Account.Name';
import ACCOUNTNUMBER_FIELD from '@salesforce/schema/Account.AccountNumber';
import PHONE_FIELD from '@salesforce/schema/Account.Phone';
import saveAccounts from '@salesforce/apex/AccountController.saveAccounts';
import { ShowToastEvent } from 'lightning/platformShowToastEvent';
export default class CreateDynamicRecord extends LightningElement {
    @track accountList = []; 
    @track index = 0;
    @api recordId;
    @track name = NAME_FIELD;
    @track industry = ACCOUNTNUMBER_FIELD;
    @track phone = PHONE_FIELD;

    @api record = {
        firstName : '',
        lastName : '',
        Email : '',
        Phone : '',
        Title : ''


        this.accountList.push ({
            sobjectType: 'Account',
            Name: '',
            AccountNumber : '',
            Phone: ''

        console.log('Enter ',this.accountList);
       // this.accountList.push(this.record);
        //console.log(' After adding Record List ', this.accountList);

        var index = this.index;
           this.accountList.splice(index, 1);

        //this.dispatchEvent(new CustomEvent('deleterow', {detail: this.index}));
        //console.log(' After adding Record List ', this.dispatchEvent);

    acc = {
        Name : this.name,
        AccountNumber : this.accNumber,
        Phone : this.phone

    handleNameChange(event) {
        this.acc.Name = event.target.value;
        console.log("name", this.acc.Name);
    handleAccountNumberChange(event) {
        this.acc.AccountNumber = event.target.value;
        console.log("AccountNumber", this.acc.AccountNumber);
    handlePhoneChange(event) {
        this.acc.Phone = event.target.value;
        console.log("Phone", this.acc.Phone);
            .then(result => {
                this.message = result;
                this.error = undefined;
                if(this.message !== undefined) {
                    this.acc.Name = '';
                    this.acc.AccountNumber = '';
                    this.acc.Phone = '';
                        new ShowToastEvent({
                            title: 'Success',
                            message: 'Account created successfully',
                            variant: 'success',
                console.log("result", this.message);
                /*console.log(' After adding Record List ', result);
                this.accountList = result;
                console.log(' After adding Record List ', this.accountList);*/
            .catch(error => {
                this.message = undefined;
                this.error = error;
                    new ShowToastEvent({
                        title: 'Error creating record',
                        message: error.body.message,
                        variant: 'error',
                console.log("error", JSON.stringify(this.error));

public with sharing class AccountController { 
    @AuraEnabled( cacheable = true ) 
    public static List< Account > getAccounts() { 
        return [ SELECT Id, Name, Industry FROM Account LIMIT 10 ]; 
    @AuraEnabled( cacheable = true )
    public static void saveAccounts(List<Account> accList){
        Insert accList;
        /*if(accList.size()>0 && accList != null){
            insert accList;