Questions tagged [iteration]

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LWC Change iteration to color even indexes

I am trying to find how to change the row color of even rows so it alternates between odd and even indexes in my list of divs so odd would be a background of say white and the evens would be a ...
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1 vote
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57 views

How can I append new data rows to an existing data extension with predefined properties and columns?

There is data-extension-row-update and data-extension-row-create, but nothing like data-extension-row-append. Say I have an existing data extension I retrieve via import ET_Client myClient = ...
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37 views

How to access an list from a list which stores all the list names

List<string> lstStrng = new List<string>{'a','b'}; List<string> lstOfNames = new List<string>{'lstStrng'}; string name = lstOfNames[0]; System.debug(name[0]); I am ...
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62 views

Lightning help with Apex array sort for:each iteration

I have a tabset that is rendering article records. Does someone have a lightning example how I would create the index to set the tab title and the order? HTML <template> <lightning-card title=...
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1 vote
1 answer
2k views

LWC: Refresh for:each loops when new Array item added

I have 2 LWC components and loop through data in the following structure periods period.stages stage.details Within stage.details I render a table/form for each detail. After the table/form I have an ...
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1 vote
1 answer
388 views

LWC: Can a "<template for:each=" be used with an inner "<template for:each=" where the inner for-each gets its value using the key from the outer?

I was looking to do the following and I'm not sure if it's possible in LWC. I have a list of records which I'd like to loop through in the UI. I also have a map of records where the key is the iD of ...
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1 answer
554 views

LWC Superbadge - unable to display boat tiles Uncaught (in promise) TypeError: Cannot set property 'nodeValue' of undefined [closed]

I'm working through the LWC superbadge. I have passed the first 5 challenges, and in order to get to the six, I'm looking at the page. I haven't yet started the sixth challenge, but am just trying to ...
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  • 619
10 votes
1 answer
263 views

Comparing Apex Loops and why Iterators are dramatically slower than for loops?

I decided to use iterators to work with collections in a functional style at some point in development, but immediately noticed a CPU time performance drawdown. So I decided to do a simple performance ...
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1 vote
1 answer
941 views

Nested tables with different headers and data LWC for:each

I have a requirement to create a component that is essentially 2 tables, parent/child. The parent table is Subscriptions, and the child table is Subscription Products that are related to that ...
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0 votes
1 answer
306 views

Lightning Iteration change <td> css

I'm trying to change the css of a specific column of a specific row in an iteration while i'm using the drag and drop API. i have 2 tables, i drag an element of the first table in the second to ...
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1 answer
33 views

Not able to insert Parent Record and child record in the same Apex function

I have a function that have 2 List of Objects in parameters (Schedule__c recList and scheduleTable__c recList2). Once I insert the recList, I am looping through the ID and insert child records to it. ...
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  • 73
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1 answer
62 views

How to iterate through an array of input fields with the same name and insert the value in an array?

I have a template that iterates through an array called amountArray and creates input fields for the amounts. The input fields have the same name called fieldAmount. When I enter value, I know which ...
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  • 73
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1 answer
313 views

LWC - How to clear my input text fields when saving?

When saving a record, my input fields should is replaced with empty value (clear the text field) and I am having issue with the one within the iteration. I have 2 inputs that are not part of the ...
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  • 73
1 vote
1 answer
144 views

Get all the Ids that were inserted by Database.insert - without iterating each record

We are using the Database.Insert(leads, false); We want only the the ids that where insert. We have a lot of leads to be checked if we use for (Database.SaveResult result: results) { if (result....
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72 views

Align table rows and columns in two different Lightning Components (Parent-Child)

I am new to Lightning Components and I have 2 Lightning Components (parent-child) where Parent iterates records of the child component. <lightning:card title="Energy Profiles"> ...
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0 votes
1 answer
388 views

Issue while saving the wrapper data through imperative way of LWC

I am trying to pass the listofWrapper-> (List) data to Apex method for DML operation. I am not able to figure out how to get Outer loop index ("Oppindex") for any change in the child ...
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1 answer
868 views

LWC Nested Iteration Issue

I am facing an issue with the nested iteration, Suppose I have one button in child loop and i want index of parent and child loop both in onclick function of JS file. I am only getting index of child ...
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1 answer
57 views

Mirroring of single picklist value in all picklists in nested aura iteraton

I have used an aura iteration to create a table and I have a picklist field inside that table which uses an aura iteration itself. The problem here is that whenever I select the value of any one of ...
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1 vote
2 answers
427 views

LWC for:each needs 3 levels, but SOQL query aggregate relationship limited to 2. What's your best practice?

so I have a structure like: <template for:each={containers.data} for:item='container'> <....> //container info <template for:each={container.Pallets__r} for:item="pallet"&...
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0 answers
875 views

Iteration in LWC not working for 2nd element of input array

I am working in LWC requirements where I have a list of records using this list I need to create inputs text. Once I loop through the list in LWC 'HTML component' my input texts are coming as aspected ...
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  • 624
1 vote
1 answer
3k views

LWC create input fields under LWC iteration

I am new to LWC. I have to create multiple input fields for different rows. Let say, I have selected 3 records from the previous page and for all those 3 records I need to create the input field and ...
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  • 624
1 vote
1 answer
485 views

Bulk Apex iterator not working with aggregate query

I am at a bit of a loss at how to properly structure a batch apex query with an iterator in order to utilize batch apex with an aggregate query. This is my current code Iterator global class ...
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  • 701
0 votes
1 answer
35 views

capture value from drowndown in iteration

Newbie in SFA development, however I have experienced in ASP.NET (C#) development. I have a question regarding this output: the NAME COLUMN is list of PRODUCT populated from the Salesforce Object. ...
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0 votes
1 answer
258 views

Error handling for iterable child component inside parent in lightning web components (LWC)

In my parent component , I have used child component inside and iteration. So for example child component is present twice in parent component. Now I want to show error message when on of the required ...
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3 votes
1 answer
2k views

How to use 'lightning-checkbox-group' in for:each loop?

Currently, my requirement is that I want a checkbox in front of names.You can see below screenshot. So I used lightning-checkbox-group in iteration but it does not work. Here is the Playground Link ...
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5 votes
2 answers
11k views

Expressions in for:each index value in LWC? [duplicate]

Currently, I am facing an issue is that I want index starting from value "1" I am using for:each in my code. <template> <lightning-card title="HelloForEach" icon-name="custom:custom14"&...
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0 votes
1 answer
4k views

LWC: Iterate Map twice - Map<Integer, Map<String, String>>()

I broke my head with this case. Please help. APEX Map < Integer, Map < String, String >> reportData = new Map < Integer, Map < String, String >> (); return reportData; JS ...
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  • 309
2 votes
2 answers
2k views

Iterating over wrapper class records lists in LWC

I have a LWC where i want to iterate over different lists of Opportunities in a wrapper. Currently im using: import { LightningElement,wire } from 'lwc'; import OppRecords from '@salesforce/apex/...
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  • 113
0 votes
1 answer
367 views

Using aura:iteration over lightning:outputField doesn't seem to work

I'd like to display a list of configured fields (names possibly stored in CMDT) with lightning:recordViewForm, so it's easy to add/remove fields without deploying the component. However aura:...
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  • 143
0 votes
1 answer
154 views

get a particular element in web component iteration

I want actually to be able to get an attribute on a particular item in the web component iteration, but cannot get it to work. Look for instance the following code : <template> <...
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  • 2,393
0 votes
1 answer
109 views

Custom Iterators - calculating scope - batch

I am trying to understand the custom iterators topic Custom Iterators But there is a thing which I don't get. There is a next() method which divides the query size into smaller ones, am I right? In ...
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  • 115
0 votes
1 answer
51 views

Is Filling a Map iterating on a list, deepcloning it and clearing a best practise?

I'm trying to fill a Map < Id, List< sObject>> by looping other the Map.keySet(), filling the list of sObjects, affecting it, and then go to the next key. I read somewhere that it was a good ...
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0 votes
0 answers
126 views

What is the best way to populate a map from a list conditionally?

I would like to know if there's a better way to populate a map from a list where conditions apply as to whether the list item is to be added to the map or not. For eg I have a list of objects ...
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  • 1,387
2 votes
2 answers
4k views

LWC: detect last element in for:each iteration

I'm trying to output a list of strings separated by commas in LWC, such as: cat, dog, mouse I need to use template for:each and output a list item and a comma, but only if the item is not the last ...
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  • 557
1 vote
0 answers
102 views

aura:iteration label of current field

Is there a possibility to get the Label of current field using aura:iteration ? <aura:iteration items="{!v.objectName}" var="objectName"> <lightning:input value="{!objectName.field1}" ...
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  • 115
1 vote
1 answer
50 views

How to Implement "fluent constructors" inside visualforce page data iterator?

I am trying to put together a custom controller class implementing the fluid interface builder pattern. Said class does compile, and my question is how can it be implemented inside a VisualForce page'...
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1 vote
2 answers
664 views

Exception not being caught; System.FinalException: Cannot modify a collection while it is being iterated

Why is this Exception not being caught? I read that System.LimitException is not caught but didn't see anywhere about System.FinalException. Non-Working Code @AuraEnabled public static List<...
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  • 545
1 vote
0 answers
2k views

Lightning button attribute "Disabled" in "aura:iteration tag"

I'm trying to enable a lightning:button if a lightning:inputField changes. This is the aura:component: <aura:component implements="flexipage:availableForRecordHome,force:hasRecordId,force:...
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1 vote
0 answers
72 views

how to check iterator in batch process

I am using an iterator to use an aggregate query on a custom object looking for unique years. on the very last iteration, I want to change a value, so I am hoping to use hasNext, but it looks like i ...
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  • 311
1 vote
2 answers
712 views

Passing List<WrapperClass> as a parameter from Visualforce to Lightning and to iterate over the List<WrapperClass>

This is my VF code, which runs on onclick <script> function func(data) { $Lightning.use("c:testingFromVFtoLightningApp", function(){ $Lightning.createComponent("c:...
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1 vote
1 answer
1k views

How to iterate sub query on lightning page

I want to display the contact names and opportunity names where AccountID is not null, I am able to display the contact names, can someone please help me to display the opportunity names too? Below ...
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  • 2,215
2 votes
1 answer
631 views

Iterate related records, display images from string name of contentAsset in Community Cloud

I'm very new to Salesforce, so my apologies if my approach is all wrong. I want to display a list of buttons with images using a lightening component in Community Cloud. The list comes from records ...
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  • 33
1 vote
1 answer
45 views

List iteration - item with space

I am trying to create a very basic static list to iterate through. One of the values has a space in it. I can't figure out how to add the item to the list with a space. In the example below, I can'...
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0 votes
1 answer
57 views

How to make varaible of items in a iteration in a lightning component

I have an iteration which reproduces a list on a lightning page. I want to make this iteration variable based on 2 lists. How do I make the list (items) variable based on IF condition? Or do I need to ...
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  • 2,068
0 votes
1 answer
405 views

iterating a multidimensional List

I am trying to recieve a email with an attachment (CSV FIle) and have it iterate through the csv and upsert it as records in a custom object. i upload the document by hand daily. PAIN! i am using a ...
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0 votes
2 answers
4k views

how to use wrapper class in batch iterator (using custom iterator)?

So I trying to use list of wrapper class as iterator in batch. below is the code I have tried so far Iterable class public class AccountCustomIterator implements Iterable<AccountWrapper>, ...
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2 votes
1 answer
9k views

Lightning Components: How to do nested aura:iteration of a list of Accounts with subselected Contacts?

Scenario In Visualforce we had strong patterns for implementing the rendering of hierarchical structures. As a simplified example (standing for many other use cases) let's say we want to show all ...
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  • 33.5k
4 votes
1 answer
12k views

Inserting Records using a lightning component

I am looking to make a lightning component to insert my Transaction__c object records against all relevant Contracts pulled back requiring action. As it stands I am returning all of relevant contracts/...
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  • 822
1 vote
2 answers
694 views

Add records incrementing based on known Date

I expect this has been described before but have been unable to find it. I am entering OpportunityLineItemSchedule in Apex and would like wipe out the default ones, which are created based on Close ...
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  • 1,268
4 votes
1 answer
1k views

Lightning Aura Iteration ReRender

I am trying to rerender an iteration(wrapper) when an input field is changed although I am extremely unfamiliar with Lightning. Everything that I've read it "it should just work", which I don't ...
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  • 4,327