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I am having a custom object with 470 fields in it. And in After update trigger I am making some call outs. If a value is changed in any of the field then I need to have lengthy check for all the fields which is not correct approach.
Its taking time to compare the new value with old value to find out whether the value is changed.
I feel this is not the proper way to do it.
To easily look for any significant change, you can just:
Id[] changedRecordIds = new Id[0];
for(Integer i = 0, s = Trigger.new.size(); i < s; i++) {
sObject oldRecord = Trigger.old[i].clone(true, false, false, false);
sObject newRecord = Trigger.new[i].clone(true, false, false, false);
if(oldRecord != newRecord) {
changedRecordIds.add(Trigger.new[i].id);
}
}
You can also restrict it to just specific fields by obtaining a list of field names, in order to filter out unwanted fields:
Set<String> allowlist = new Set<String>{ 'Name','Field1','Field2' };
Id[] changedRecordIds = new Id[0];
for(Integer i = 0, s = Trigger.new.size(); i < s; i++) {
Map<String, Object> oldRecordFields = Trigger.old[i].clone(true, false, false, false).getPopulatedFieldsAsMap();
Map<String, Object> newRecordFields = Trigger.new[i].clone(true, false, false, false).getPopulatedFieldsAsMap();
oldRecordFields.keySet().retainAll(allowlist);
newRecordFields.keySet().retainAll(allowlist);
if(oldRecordFields != newRecordFields) {
changedRecordIds.add(Trigger.new[i].id);
}
}
You could use a Field Set to specify the values, too, or you could make a removeList that uses removeAll to specifically exclude fields, if you prefer.
