Account[] acctsList = [SELECT Id, Name, BillingCity FROM Account WHERE BillingCity = 'Bombay']; for (Account a : acctsList) { a.BillingCity = 'Mumbai'; } Account newAcct = new Account(Name = 'Acme', BillingCity = 'San Francisco'); acctsList.add(newAcct); try { upsert acctsList; } catch (DmlException e) { // Process exception here }
This next example uses the Database.upsert method to upsert a collection of leads that are passed in. This example allows for partial processing of records, that is, in case some records fail processing, the remaining records are still inserted or updated. It iterates through the results and adds a new task to each record that was processed successfully. The task sObjects are saved in a list, which is then bulk inserted. This example is followed by a test class that contains a test method for testing the example.
/* This class demonstrates and tests the use of the * partial processing DML operations */ public class DmlSamples { /* This method accepts a collection of lead records and creates a task for the owner(s) of any leads that were created as new, that is, not updated as a result of the upsert operation */ public static List<Database.upsertResult> upsertLeads(List<Lead> leads) { /* Perform the upsert. In this case the unique identifier for the insert or update decision is the Salesforce record ID. If the record ID is null the row will be inserted, otherwise an update will be attempted. */ List<Database.upsertResult> uResults = Database.upsert(leads,false); /* This is the list for new tasks that will be inserted when new leads are created. */ List<Task> tasks = new List<Task>(); for(Database.upsertResult result:uResults) { if (result.isSuccess() && result.isCreated()) tasks.add(new Task(Subject = 'Follow-up', WhoId = result.getId())); } /* If there are tasks to be inserted, insert them */ Database.insert(tasks); return uResults; } }
@isTest private class DmlSamplesTest { public static testMethod void testUpsertLeads() { /* We only need to test the insert side of upsert */ List<Lead> leads = new List<Lead>(); /* Create a set of leads for testing */ for(Integer i = 0;i < 100; i++) { leads.add(new Lead(LastName = 'testLead', Company = 'testCompany')); } /* Switch to the runtime limit context */ Test.startTest(); /* Exercise the method */ List<Database.upsertResult> results = DmlSamples.upsertLeads(leads); /* Switch back to the test context for limits */ Test.stopTest(); /* ID set for asserting the tasks were created as expected */ Set<Id> ids = new Set<Id>(); /* Iterate over the results, asserting success and adding the new ID to the set for use in the comprehensive assertion phase below. */ for(Database.upsertResult result:results) { System.assert(result.isSuccess()); ids.add(result.getId()); } /* Assert that exactly one task exists for each lead that was inserted. */ for(Lead l:[SELECT Id, (SELECT Subject FROM Tasks) FROM Lead WHERE Id IN :ids]) { System.assertEquals(1,l.tasks.size()); } } }
Use of upsert with an external ID can reduce the number of DML statements in your code, and help you to avoid hitting governor limits (see Execution Governors and Limits). This next example uses upsert and an external ID field Line_Item_Id__c on the Asset object to maintain a one-to-one relationship between an asset and an opportunity line item.
public void upsertExample() { Opportunity opp = [SELECT Id, Name, AccountId, (SELECT Id, PricebookEntry.Product2Id, PricebookEntry.Name FROM OpportunityLineItems) FROM Opportunity WHERE HasOpportunityLineItem = true LIMIT 1]; Asset[] assets = new Asset[]{}; // Create an asset for each line item on the opportunity for (OpportunityLineItem lineItem:opp.OpportunityLineItems) { //This code populates the line item Id, AccountId, and Product2Id for each asset Asset asset = new Asset(Name = lineItem.PricebookEntry.Name, Line_Item_ID__c = lineItem.Id, AccountId = opp.AccountId, Product2Id = lineItem.PricebookEntry.Product2Id); assets.add(asset); } try { upsert assets Line_Item_ID__c; // This line upserts the assets list with // the Line_Item_Id__c field specified as the // Asset field that should be used for matching // the record that should be upserted. } catch (DmlException e) { System.debug(e.getMessage()); } }