Contents
How do I use a trigger context variable in Apex class?
Trigger Context Variables Considerations
- trigger. new and trigger. old cannot be used in Apex DML operations.
- You can use an object to change its own field values using trigger. new , but only in before triggers. In all after triggers, trigger.
- trigger. old is always read-only.
- You cannot delete trigger. new .
How do I give someone access to an apex class?
Required Editions and User Permissions From Setup, enter Profiles in the Quick Find box, then select Profiles. Select a profile, and click its name. In the Apex Class Access page or related list, click Edit. Select the Apex classes that you want to enable from the Available Apex Classes list and click Add.
How to pass the trigger event to apex class?
Salesforce Introduced Context Variables to do these kind of checks. isInsert — Returns true if this trigger was fired due to an insert operation, from the Salesforce user interface, Apex, or the API. if (Trigger.isInsert) { …… } is Professional way of writing the code, which will allow us to further extend to update, delete events.
How to pass trigger values to a class?
Trigger.newMap and Trigger.oldMap are typed as Map . All of these values can be passed to a class like any other parameters, and it’s very common to do so as part of a quality trigger framework. For example: I recommend reviewing Trigger Context Variables and Trigger Context Variables Considerations from the Apex Developer Guide.
How many soql queries can be invoked in apex?
An individual Apex request gets a maximum of 100 SOQL queries before exceeding that governor limit. So if this trigger is invoked by a batch of more than 100 Account records, the governor limit will throw a runtime exception It is important to use Apex Collections to efficiently query data and store the data in memory.
Can a trigger be exposed for test purposes?
If you write methods in your Triggers, those can’t be exposed for test purposes. You also can’t expose logic to be re-used anywhere else in your org. Bulkifying Apex code refers to the concept of making sure the code properly handles more than one record at a time.