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nlang1.388093286234183E12 Create Apex Trigger for Cross Object
Hello,
I am an experienced admin with no apex experience. I was hoping someone can point me in the right direction, I would like to take a stab at creating a simple Apex trigger on the opportunity object to update a field when a field is changed on a child custom object named Implementations (lookup relationship). I understand that cross object workflows can be done with master deatil relationships, however, I do not want to create a master relationship in this case. Any direction would be appreciated.
Thanks!
I am an experienced admin with no apex experience. I was hoping someone can point me in the right direction, I would like to take a stab at creating a simple Apex trigger on the opportunity object to update a field when a field is changed on a child custom object named Implementations (lookup relationship). I understand that cross object workflows can be done with master deatil relationships, however, I do not want to create a master relationship in this case. Any direction would be appreciated.
Thanks!
trigger ImplementationsTrigger on Implementation__c (after insert, after update) {
Map<Id, Opportunity> opportunities = new Map<Id, Opportunity>();
Opportunity[] updates;
Map<Id, Database.SaveResult> failures = new Map<Id, Database.SaveResult>();
// Build map for opportunities to update (avoiding duplicates)
for(Implementation__c record: Trigger.new) {
if(record.Opportunity__c != null) {
opportunities.put(record.Opportunity__c, new Opportunity(Id=record.Opportunity__c, FieldToUpdate__c=record.FieldToCopy__c));
}
}
// Make into a list we can depend on by value
updates = opportunities.values();
// Update the records, capturing any errors
Database.SaveResult[] results = Database.Update(updates, false);
// Note which records (if any) had errors
for(Integer index = 0; index < results.size(); index++) {
if(!results[index].isSuccess()) {
failures.put(updates[index].Id, results[index]);
}
}
// Report errors back to the calling operation
for(Implementation__c record: Trigger.new) {
if(failures.containskey(record.Opportunity__c)) {
record.addError('Error while updating parent opportunity: '+failures.get(record.Opportunity__c).getErrors()[0].getMessage());
}
}
}
Your specific milage may vary, but hopefully this leads you in the right direction.
Using your approach, I made one implementation
1) Create custom object named shipment with custom field status which has 3 values pending, dispatched,delivered
2) Create lookup field in shipment object to opportunity object
3) Create shipmentstatus field of type text in opportunity object
4) Create trigger on shipment object as follows
trigger triggeropportunityupdate on Shipment__c (after insert,after update) {
Map<Id, Opportunity> opportunities = new Map<Id, Opportunity>();
Opportunity[] updates;
Map<Id, Database.SaveResult> failures = new Map<Id, Database.SaveResult>();
// Build map for opportunities to update (avoiding duplicates)
for(Shipment__c record: Trigger.new) {
if(record.Opportunity__c != null) {
opportunities.put(record.Opportunity__c, new Opportunity(Id=record.Opportunity__c, shipmentstatus__c=record.status__c));
}
}
// Make into a list we can depend on by value
updates = opportunities.values();
// Update the records, capturing any errors
Database.SaveResult[] results = Database.Update(updates, false);
// Note which records (if any) had errors
for(Integer index = 0; index < results.size(); index++) {
if(!results[index].isSuccess()) {
failures.put(updates[index].Id, results[index]);
}
// Report errors back to the calling operation
for(Shipment__c record: Trigger.new) {
if(failures.containskey(record.Opportunity__c)) {
record.addError('Error while updating parent opportunity: '+failures.get(record.Opportunity__c).getErrors()[0].getMessage());
}
}
}
}
5) Test it
I hope this will be helpful for you to understand how trigger works.
Enjoy
Amit