Field-Level Security

Enforce User Mode for Database Operations

Apex code runs in system mode by default, which means that it runs with substantially elevated permissions over the user running the code. To enhance the security context of Apex, you can specify user mode access for database operations. Field-level security (FLS) and object permissions of the running user are respected in user mode, unlike in system mode. User mode always applies sharing rules, but in system mode they’re controlled by sharing keywords on the class

Used methods	Mode	FLS
none (by default)	USER_MODE	enforced
.systemMode()	SYSTEM_MODE	ignored
.systemMode().stripInaccessible()	SYSTEM_MODE	enforced

Default

USER_MODE is a enabled by default. It means that the object permissions, field-level security, as well as sharing rules, are enforced.

public inherited sharing class SOQL_Account extends SOQL implements SOQL.Selector {
    public static SOQL_Account query() {
        return new SOQL_Account();
    }

    private SOQL_Account() {
        super(Account.SObjectType);
        with(Account.Name, Account.AccountNumber);
    }
}

The object permissions, field-level security, and sharing rules are enforced. Access to the Account object and fields (Account.Name and Account.AccountNumber) will be checked.

public without sharing class ExampleController {
    public static List<Account> getAccountsByRecordType(String recordType) {
        return SOQL_Account.query().toList();
    }
}

Customize

System Mode

Developer can disable USER_MODE and enable SYSTEM_MODE using .systemMode() method.

public inherited sharing class SOQL_Account extends SOQL implements SOQL.Selector {
    public static SOQL_Account query() {
        return new SOQL_Account();
    }

    private SOQL_Account() {
        super(Account.SObjectType);
        with(Account.Name, Account.AccountNumber)
            .systemMode();
    }
}

The object permissions and field-level permissions are ignored.

public without sharing class ExampleController {
    public static List<Account> getAccountsByRecordType(String recordType) {
        return SOQL_Account.query().toList();
    }
}

Strip Inaccessible

USER_MODE enforces not only object and field-level security but also sharing rules (with sharing). You may encounter situations where you need object and field-level security but want to ignore sharing rules (without sharing). To achieve this, use .systemMode(), .withoutSharing() and .stripInaccessible().

public inherited sharing class SOQL_Account extends SOQL implements SOQL.Selector {
    public static SOQL_Account query() {
        return new SOQL_Account();
    }

    private SOQL_Account() {
        super(Account.SObjectType);
        with(Account.Name, Account.AccountNumber)
            .systemMode()
            .withoutSharing()
            .stripInaccessible();
    }
}

The object permissions and field-level permissions are enforced, but sharing rules are ignored.

public without sharing class ExampleController {
    public static List<Account> getAccountsByRecordType(String recordType) {
        return SOQL_Account.query().toList();
    }
}