How to ensure Field Level Security in SOQL in Salesforce?

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How to ensure Field Level Security in SOQL in Salesforce?

Magulan Duraipandian

If any fields or objects referenced in the SOQL SELECT query using WITH SECURITY_ENFORCED are inaccessible to the user, an exception is thrown, and no data is returned.

Use the WITH SECURITY_ENFORCED clause to enable field and object level security permissions checking for SOQL SELECT queries in Apex code, including subqueries and cross-object relationships.

Example
If field access for either LastName or Description is hidden, the following SOQL query throws an exception indicating insufficient permissions.

try {
    List < Account > listAccountsWithOpptys = [
        SELECT Id, ( SELECT LastName FROM Contacts),
                                               ( SELECT Description FROM Opportunities )
                                               FROM Account WITH SECURITY_ENFORCED
    ];
    System.debug( listAccountsWithOpptys );
} catch( Exception e ) {
    System.debug( 'Exception is ' + e.getMessage() );
}

Exception if the Field Level Security is Hidden for the User’s Profile:

The WITH SECURITY_ENFORCED clause is only available in Apex. Using WITH SECURITY_ENFORCED in Apex classes or triggers with an API version earlier than 45.0 is not recommended.

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