Tag Archives: Trigger Context

Apex Trigger Context Variables

Biswajeet September 14, 2017 No Comments

All triggers define implicit variables that allow developers to access runtime context.
These variables are contained in the System.Trigger class:

Variable	Usage
`isExecuting`	Returns true if the current context for the Apex code is a trigger, not a Visualforce page, a Web service, or an `executeanonymous()` API call.
`isInsert`	Returns `true` if this trigger was fired due to an insert operation, from the Salesforce user interface, Apex, or the API.
`isUpdate`	Returns `true` if this trigger was fired due to an update operation, from the Salesforce user interface, Apex, or the API.
`isDelete`	Returns `true` if this trigger was fired due to a delete operation, from the Salesforce user interface, Apex, or the API.
`isBefore`	Returns `true` if this trigger was fired before any record was saved.
`isAfter`	Returns `true` if this trigger was fired after all records were saved.
`isUndelete`	Returns `true` if this trigger was fired after a record is recovered from the Recycle Bin (that is, after an undelete operation from the Salesforce user interface, Apex, or the API.)
`new`	Returns a list of the new versions of the sObject records. This sObject list is only available in `insert`, `update`, and `undelete` triggers, and the records can only be modified in `before` triggers.
`newMap`	A map of IDs to the new versions of the sObject records. This map is only available in `before update`, `after insert`, `after update`, and `after undelete` triggers.
`old`	Returns a list of the old versions of the sObject records. This sObject list is only available in `update` and `delete` triggers.
`oldMap`	A map of IDs to the old versions of the sObject records. This map is only available in `update` and `delete` triggers.
`size`	The total number of records in a trigger invocation, both old and new.