How to get the that changed field on a record?
Is there a quick/scalable/reliable way to get a list of the fields that changed before an update is made to a record? I know I get the bulk (maybe all even) in a before update trigger on the record, but I'm not sure if that would get all them?
I think that what you need is something like the method below to get the that changed field, you can create a list of Schema.sObjectField to include/exclude certain fields. In your trigger just call this method with the record Id.
public Schema.sObjectField[] getChangedFields(ID recordId, Schema.sObjectField[] fieldList) {
Schema.sObjectField[] changedFields = new list ();
SObject o1 = Trigger.oldMap.get(recordId);
SObject o2 = Trigger.newMap.get(recordId);
for (Schema.sObjectField field : fieldList) {
Object v1 = o1.get(field);
Object v2 = o2.get(field);
if (didFieldChange(v1, v2)) {
changedFields.add(field);
}
}
return changedFields;
}
private static Boolean didFieldChange(Object v1, Object v2) {
if (v1 == null && v2 == null) {
return false;
}
if (v1 != v2) {
return true;
}
return false;
}Please mark this answer as accepted if this works for you and for the other readers bumping up if it helped you.