20
votes
Accepted
Difference between trigger.new and trigger.newmap
Suppose you have a custom object Custom_obj__c
Trigger.New means it is a List<Custom_obj__c>
and
Trigger.NewMap means it is a map<Id, Custom_obj__c>
In before insert context your ...
- 22.5k
14
votes
Accepted
How to remove records to be processed from before update trigger
Background: understanding collections and references
Your understanding isn't quite correct.
Collections (lists, sets, and maps) generally store non-primitive types (i.e. pretty much everything that ...
- 59.3k
12
votes
Accepted
Is it possible to write Trigger for Before & After DML?
It is quite possible, and in fact recommended (if you need trigger logic on both events).
See also:
Trigger Frameworks and Apex Trigger Best Practices
Triggers (Apex Developer Guide)
A common ...
- 149k
12
votes
Accepted
Customize error message for trigger and display error message below the field
You can add an error to a specific field using the addError method as follows:
SObject someRecord;
someRecord.SomeField__c.addError('Custom Message');
//or
someRecord.someField__c.addError(...
- 149k
12
votes
Accepted
Do apex methods invoke at the same time in a trigger?
Apex Code is single-threaded. This means that your code runs sequentially, from top to bottom, until the end of the method. If you have validation occurring first, followed by other updates, your code ...
- 481k
12
votes
Accepted
Trigger flow if a specific field on the updated record changed
Flow Builder's before-save trigger executes before the record is saved to the database. For an existing record, the record that's in the database still has the previous field values, while $Record ...
- 4,693
10
votes
Accepted
APEX Lock and Unlock a Record
== is for equality checks, = is for assignment. As such:
If (soAccount.ISLock__c = True){
will assign the value of true to IsLock__c, and this statement will always be true. For this reason, I ...
- 481k
8
votes
Is there any way to use only one SOQL for both before and after trigger on the same object?
This is a good time to learn about the Lazy Load pattern. You can write your cache in such a way that you only consume the query if you actually need the data. Now if you make a reference to this Apex ...
- 149k
8
votes
Accepted
Is there any way to use only one SOQL for both before and after trigger on the same object?
Yes static variables are meant for same purpose .
Create a static list in your helper class and use same in your before trigger and after trigger
public class cachequery {
public static List<...
- 90.4k
8
votes
Difference between trigger.new and trigger.newmap
trigger.new is simply a list of the records being processed by the trigger, so if all you need to do is loop through them then you can use that.
trigger.newMap just allows you to target specific ...
- 25.3k
8
votes
Variable does not exist:Trigger
You have a typo:
Trigger.oldMap.get.(cl.id).Initial_Estimate__c
should be:
Trigger.oldMap.get(cl.id).Initial_Estimate__c
You probably also need to apply an explicit cast, like:
((Claim__c) ...
- 34.1k
7
votes
Accepted
Do we lose flexibility of Before trigger by shifting to Process Builder?
If you care about order of execution, triggers are far from obsolete, and this consideration still offers a compelling argument for why you would choose an Apex Trigger over Process Builder. If you ...
- 149k
7
votes
Accepted
The code block containing 'addError' is being executed but no error thrown during record save
The problem is this line here:
objOpp = new Opportunity(id = mapOfOpportunity.get(eachKey)[0].Id);
You're adding an error to a record that exists only in memory. Errors will only surface when you ...
- 481k
7
votes
Accepted
Before Delete Trigger, Need to Delete Linked Record, getting "De-reference Null Object" Error
This is happening because Trigger.new is not available on before delete context. You'll want to use Trigger.old instead.
Check this document about Trigger Context Variables.
- 12.7k
7
votes
Accepted
Invalid loop variable type expected SObject was Relatie__c
Trigger.new is generic List while iterating you have to typecast it into List.
So your for loop will be,
for(Relatie__c rc :(List<Relatie__c >) Trigger.New){
}
That being said, I found few ...
- 35.8k
7
votes
Accepted
Why do we need to update related records in an after trigger but not before?
If I understand your question correctly, then you actually can take your related record update logic and put it in either a before or after trigger.
Salesforce's suggestion is that before triggers ...
- 59.3k
7
votes
Static Approach in recursive trigger
We need to take measures to prevent recursion precisely because the approach you're suggesting (compare old and new trigger context records) doesn't work. Or, at the very least, it doesn't work in all ...
- 59.3k
6
votes
Accepted
Trigger Error in salesforce
I just checked lastmodified by id is null on a before insert event and this makes sense.
For example (hastily written trigger based approach, not best practice!):
trigger eventTrigger on Event (before ...
- 5,405
6
votes
Accepted
Trigger NullPointerException Error Before Update
You can't set cross object fields on trigger context records.
When you specify Case__r on a record in your trigger.new collection, it is null. Hence trying to set its Status results in an attempt to ...
- 149k
6
votes
Accepted
How to get parent data in a before insert context?
You can just query the PricebookEntry records instead:
Set<Id> entryIds = new Set<Id>();
for (QuoteLineItem item : trigger.new) entryIds.add(item.PricebookEntryId);
Map<Id, ...
- 149k
6
votes
Is this trigger properly bulkified?
Yes and no
No need for seperate block for update and insert they are doing almost (thanks DerekF for pointing out the additional if) the same thing and they can be consolidated pretty efficiently.
...
- 54k
6
votes
Accepted
Why doesn't this trigger work?
It isn't working because the Asset Id field is null in the before insert context.
Records do not have Ids until after insert.
Beyond that, you're updating an Account record in your Asset trigger, ...
- 59.3k
6
votes
Before Trigger & Formula Field Reliability
As an addendum to @adrianLarson comment:
Cross-object formula fields may be available in the before trigger context if the parent relationship is based on a required field or on a lookup field with ...
- 69.9k
6
votes
Accepted
Custom Validation using Trigger throwing System.FinalException: SObject row does not allow errors
The problem is that you are calling addError on Trigger.OldMap instead of Trigger.NewMap. When declaring the signature for checkForStageDuration you have it (oldMap, newMap) but when you are passing ...
- 1,170
6
votes
Accepted
Why is my flag not working on maximum trigger depth exceeded
You're seeing recursion because your recursion guard is in the wrong place. When this gets executed:
AankoopDetailTriggerHandler.isBeforeInsert(trigger.new);
if(...
- 92.1k
6
votes
How do I do a universal SOQL?
You can make use of dynamic SOQL:
String type = 'Abc__c';
Map<Id, SObject> m = new Map<Id, SObject>(Database.query('SELECT Id FROM ' + type));
Also see the SObject documentation for ...
- 135k
6
votes
Accepted
How do I do a universal SOQL?
It is possible to get the object's type from the ID then use this in the dynamic SOQL. For example:
Id id = Id.valueOf(tool.cId__c);
String objectAPIName = id.getSobjectType().getDescribe().name;
...
- 34.1k
6
votes
Accepted
"Compile Error: Variable does not exist" but I've declared it in the line above
You should put { and } around the code block below the if.
As it is now, the if only applies to one line of code, the one directly following it. And so the declaration is not visible to the following ...
- 3,984
6
votes
CPU limit issue while testing APex trigger
Inserting throngs upon throngs of records for tests is pretty much never the answer. Even if you didn't run into CPU limits, tests are still subject to the other governor limits as well (including the ...
- 59.3k
5
votes
Accepted
I am trying to write a trigger which is partially working
You are trying to add the Id of an Order to OrderIds before you insert the orders.
sObjects don't have Ids before you insert them*
I'd suggest taking your insert OrderToInsert; DML statement outside ...
- 59.3k
Only top scored, non community-wiki answers of a minimum length are eligible