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 records by Id should you not need to process everything, or if you need to map other records back to these. set<Id> accIds = new set<Id> ();
Full Answer
What is the use of trigger NEWMAP?
Trigger.NewMap: Trigger.newMap returns map of new records which are trying to insert into Database. This is available in Before Insert, Before Update, After Insert, After Update Triggers and undelete Triggers.
What is oldmap trigger in Salesforce?
Trigger.OldMap : Trigger.oldMap returns map of old records which are updated with new values. These List of records already there in Database. Trigger.oldmap available in Before update, after update, Before Delete and After Delete triggers.
What is the difference between before and after triggers in Salesforce?
Before triggers are used to update or validate record values before they’re saved to the database. After triggers are used to access field values that are set by the system (such as a record's Id or LastModifiedDate field), and to affect changes in other records, such as logging into an audit table or firing asynchronous events with a queue.
Is it possible to compare similar records using trigger new map?
When you use trigger.newMap you can be for certain you are comparing similar records. This may just be a best practice. According to the docs, Trigger.new returns a list, which are ordered, and Trigger.newMap returns a map - which are unordered. The docs specifically state you should not rely on the ordering of a map's elements.
What is trigger newMap in Salesforce?
newMap: Trigger. newMap is a map with key as ID of the record and value as the record itself. Just like the above explanation, in case of accounts when we say trigger. newMap we are talking about a map of key-value pairs where the key is the account ID and the value is the account record itself.
Can we use trigger newMap in after insert?
Trigger. NewMap cannot be used in all Trigger events. It can only be used in the following: After Insert.
Can we use trigger newMap in before insert trigger?
No Trigger. newMap cannot be used in before insert.
What is trigger newMap and trigger oldMap in Salesforce?
Trigger. new will have current details of the record getting inserted or updated, where as trigger. old will have the existing details for a record before it is updated or deleted. Trigger. OldMap: A map of IDs to the old versions of the sObject records.
Why trigger newMap is not available in before insert?
OLDMAP. WITH Before Insert, TRIGGER. NEWMAP is not available as we do not have the id of the record generated before the record is inserted, id gets generated when the record is inserted in the database.
Can a trigger call a batch class?
Batch Apex can be invoked using an Apex trigger. But the trigger should not add more batch jobs than the limit.
Can we get record ID in before insert trigger?
In before insert - id value wont be there.... since the record is not inserted into database. in before update - id value will be there and you will be albe to use that id for calcualtion. Only in After Insert you will get the id of that record.
Can we use trigger old in after update?
trigger. old is available only on the update and delete events.
Can we use trigger new () in Before & After trigger?
Trigger. New: Trigger. new returns List of new records which are trying to insert into Database. This is available in Before Insert, Before Update, After Insert, After Update Triggers and undelete Triggers.
What is the difference between trigger new and trigger old and trigger newMap and trigger oldMap?
newMap returns a new map of records with id and trigger. oldMap returns an old map of records with id.
What is trigger new size?
When someone tries to update the number of records using inline editing then the number of records involved in the update operation becomes the size of Trigger. New. Size()... So in the same way when someone tries to update the two records using inline editing then the Trigger.
How do I use triggers in Salesforce?
The simplest example of a trigger is a trigger on contact which will create a new Account record whenever a contact is created without an account. In the Developer Console, click: File > New > Apex Trigger. Name the trigger “WelcomeTrigger” and choose “Account” as the sObject.
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