Custom Validator

Definitions

1. Validation logic written for application-specific rules that are not fully covered by generic schema checks or framework defaults. Custom validators are common for business constraints, cross-field dependencies, and external consistency requirements.

   In plain English: Validation code created for project-specific rules.

   Example: "The signup form relied on a custom validator to ensure the chosen subdomain was both well-formed and still available."

Related Terms

• JSON Schema
• Runtime Type Check
• Validation
• Request Validation
• API Testing
• Certification
• Complex Type
• Config Schema