Command And Query Integration

Validation runs automatically before command execution and query performance.

Commands

const command = new CreateUserCommand();
command.email = '';
command.age = 15;

const result = await command.execute();
// result.isValid === false

Queries

const query = new SearchUsersQuery();
query.parameters = { searchTerm: 'ab', minAge: -5 };

const result = await query.perform();
// result.isValid === false

Backend-Governed Validation

Rules are defined on the backend and extracted by proxy generation:

• Single source of truth for validation rules
• Consistent frontend/backend behavior
• Type-safe generated validators

See Backend Command Validation and Backend Query Validation.

Related

• Rules And Fluent API
• Validation Results
• Severity Filtering