ステップ 4: クラスメソッドの最終バージョンを作成する

1public class InvoiceUtilities {
2   // Class method to renumber Line Items for a given Invoice number. 
3   // Returns a string that indicates success or failure. 
4   public 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
14      // Update the Line Items in one transaction, rollback if any problems 
15      // and return error messages to the calling environment. 
16
17      // On success, return a message to the calling program. 
18      return 'Line items renumbered successfully.'; 
19   } 
20}

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

1public class InvoiceUtilities { 
2
3   // Class method to renumber Line Items for a given Invoice number. 
4   // Returns a string that indicates success or failure. 
5   public static String renumberLineItems(String invoiceName) { 
6
7      // Create a copy of the target Invoice object and its Line Items. 
8      Invoice__c invoice = 
9         [SELECT i.Name, (SELECT Name FROM Line_Items__r ORDER BY Name) 
10          FROM Invoice__c i 
11          WHERE i.Name = :invoiceName LIMIT 1]; 
12
13      // Loop through each Line Item, renumbering as you go. 
14      Integer i = 1; 
15      for (Line_Item__c item : invoice.Line_Items__r) { 
16         item.Name = String.valueOf(i); 
17         System.debug(item.Name);
18         i++; 
19      }
20
21      // Update the Line Items in one transaction, rollback if any problems 
22      // and return error messages to the calling environment. 
23      try { 
24         Database.update(invoice.Line_Items__r); 
25      } 
26      catch (DmlException e) { 
27         return e.getMessage(); 
28      } 
29
30      // On success, return a message to the calling program. 
31      return 'Line items re-numbered successfully.';   
32   }
33}