Record API in BeforeDelete

Record

Type: TriggerHandler.DeleteRecord. Predicates read the old row and never throw on null.

Method	In BeforeDelete
getId()	the record Id
getOldSObject()	the Trigger.old row, read-only
getOldParent(relationshipName)	the parent the old row pointed to, loaded by PriorParentQuery, or null
getRelated(providerName)	rows from a RelatedQuery provider
isRecordTypeEqual(recordTypeDeveloperName), isRecordTypeNotEqual	record type developer name matches / differs
equals(field, value), doesNotEqual	equal / different; text ignores case
contains(field, value), doesNotContain, startsWith, endsWith	text match; case-sensitive
isNull(field), isNotNull	null / not null
isEmpty(field), isNotEmpty	null or '' / neither
isBlank(field), isNotBlank	null, '' or whitespace / none
isTrue(field), isFalse	true / false
greaterThan(field, value), greaterThanOrEqualTo, lessThan, lessThanOrEqualTo	number or date comparison; false for null

Records

Type: TriggerHandler.DeleteRecords, passed to RecordsProvider.query (every record in the chunk) and finalizeBeforeDelete (the qualified records).

Method	In BeforeDelete
getIds()	the record Ids
getIdsOf(field)	non-null Ids in a lookup or Id field
getIdsOf(relationshipName, field)	Ids in a field of a parent loaded by PriorParentQuery
getValuesOf(field)	non-null values of a field, as text
getValuesOf(relationshipName, field)	values of a field of a parent loaded by PriorParentQuery, as text
getRecords()	the records, as DeleteRecord
size()	the number of records

Good to Know

• Only the old row. There is no put, getNewSObject or getNewParent.
• Read-only, but takes errors. Writing to getOldSObject() throws. getOldSObject().addError('…') blocks the delete of that record.
• Lookups hold only the Id. ((Contact) record.getOldSObject()).Account is null. Declare a PriorParentQuery and read getOldParent('Account').
• No merge winner yet. MasterRecordId is set only in AfterDelete.