ステップ 3: Apex クラスを変更する

1global with sharing class InvoiceUtilities {
2   // Class method to renumber Line Items for a given Invoice number.
3   // Returns a string that indicates success or failure.
4   webservice static String renumberLineItems(String invoiceName) {
5
6      // Create a copy of the target Invoice object and its Line Items.
7      Invoice__c invoice = 
8         [SELECT i.Name, (SELECT Name FROM Line_Items__r ORDER BY Name)
9          FROM Invoice__c i
10          WHERE i.Name = :invoiceName LIMIT 1];
11
12      // Loop through each Line Item, renumbering as you go.
13      Integer i = 1;
14      for (Line_Item__c item : invoice.Line_Items__r) {
15         item.Name = String.valueOf(i);
16         System.debug(item.Name);
17         i++;
18      }
19
20      // Update the Line Items in one transaction, rollback if any problems
21      // and return error messages to the calling environment.
22      try {
23         Database.update(invoice.Line_Items__r);
24      }
25      catch (DmlException e) {
26         return e.getMessage();
27      }
28
29      // On success, return a message to the calling program.
30      return 'Line items renumbered successfully.';
31   }
32}