Show Related Lead number in Opportunity

The following example illustrates how you can get an Opportunity page to display the associated lead number:

1. Create a new sandbox in Application Composer.

   See "Create and Activate Sandboxes" in the Configuring and Extending Applications guide.

2. In Application Composer, expand Opportunity and do the following:

   1. Go to the Fields page and create a custom text field named Lead Number.

      See "Text Fields" in the Configuring Applications Using Application Composer guide.

   2. On the Triggers tab of the Scripts page, add a new BeforeUpdate trigger and enter the following in the Trigger Definition script section:

      if (LeadNumber_c == null || LeadNumber_c == ''){
        def leads = OpportunityLead
        
        if (leads.hasNext()){
        def a = leads.first()
        LeadNumber_c = a.LeadNumber
        }
      }

      See "Server Scripts" in the Configuring Applications Using Application Composer guide for more information.