Retrieving fields when a lookup is populated
When viewing an sObject that has a lookup relationship to another sObject, additional fields from the related sObject can be displayed on the page using formula fields. When creating a new record, or editing an existing record and changing the lookup value, formula fields cannot be used, as the lookup field has only been populated with a record ID and the related record has not been retrieved.
In this recipe, we will create a Visualforce page that allows a user to create a case sObject record. The case standard controller and a controller extension manage the new case record. When the lookup to the account that the case is related to is populated, additional fields are retrieved from the account record ...
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