Sample Trigger:
trigger FieldHistory on Member__c (after insert, after update) {
Map<Id, Member__c> MemberMap = trigger.oldMap;
List<FeedItem> FIList = new List<FeedItem>();
if(trigger.isInsert) {
for(Member__c Mem : trigger.new) {
FeedItem FI = new FeedItem();
FI.Body = ‘Member Created’;
FI.ParentId = Mem.Id;
FIList.add(FI);
}
insert FIList;
}
if(trigger.isUpdate) {
for(Member__c Mem : trigger.new) {
Member__c OldMem = new Member__c();
OldMem = MemberMap.get(Mem.Id);
if(Mem.Area__c != OldMem.Area__c) {
FeedItem FI = new FeedItem();
FI.Body = ‘Area changed from ‘ + OldMem.Area__c + ‘ to ‘ + Mem.Area__c;
FI.ParentId = Mem.Id;
FIList.add(FI);
}
}
if(!FIList.isEmpty()){
insert FIList;
}
}
}
Output:
