Note that this map is only available in update and delete triggers. Trigger.newMap: Trigger.newMap is a map with key as ID of the record and value as the record itself.
Full Answer
What is the use of trigger NEWMAP in Salesforce?
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. This list of records can only modified in Before triggers. You need to sign in to do that.
How to use oldmap and NEWMAP in Salesforce?
You can do that trigger.oldmap.account.owner (abc)== trigger.newmap.account.owner (xyz).. (just an example as this is not the right way to access account owner field). In the above example, you can make out that oldmap and newmap is used to compare the old and new versions of Sobject records.
What is the difference between trigger new and trigger old in Salesforce?
Trigger.new and Trigger.old both are context variables in Salesforce. 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. This list of records can only modified in Before triggers.
Do I need to use DML to trigger a contact Trigger?
If your trigger is on Account, you will need to use DML and have your Contact records fire their own trigger (s).
What is newMap in trigger?
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 newMap in before trigger?
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.
Does After trigger work on delete in Salesforce?
Trigger After Delete Salesforce executes the custom logic after the data is deleted from the Salesforce Database. If you are looking to delete related records, you can make use of Trigger After Delete Salesforce.
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.
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.
Is trigger old Available in after delete?
trigger. old is available only on the update and delete events.
What is after delete events in triggers?
This event runs the block of code after the data is deleted from the database. Operations such deleting related records can be handled using this event.
Can we use trigger new in before delete?
new is not available on before delete, and after delete triggers.
What is after undelete event in triggers?
The after undelete trigger event only works with recovered records—that is, records that were deleted and then recovered from the Recycle Bin through the undelete DML statement. These are also called undeleted records.
Can a trigger call a batch class?
Yes it is possible, we can call a batch apex from trigger but we should always keep in mind that we should not call batch apex from trigger each time as this will exceeds the governor limit this is because of the reason that we can only have 5 apex jobs queued or executing at a time.
Before Insert Trigger
Trigger.new- what are the records going to insert into Database [not commited yet, id=null] trigger.old- NULL Trigger.newmap-null Trigger.old-Null
Afeter Insert
Trigger.new- New List of Records which are inserted Trigger.old- null Trigger.NewMap- New Map Trigger.oldMap- Null Follow this link for More about Difference Between Trigger.new & Trigger.old