How to override a default error message in AJV

Question

I am using ajv-errors to customize error messages during input data validation. As the custom code for the "maxLength" keyword is repeated several times, I aim to override the default error message to something like "max_length_of_string_is_255_characters."

Unfortunately, I have not come across any documentation or examples addressing this specific matter. Has anyone attempted this and achieved success?

Answer 1

The Ajv errors are just plain JavaScript objects. You can write a function that goes through the errors and adjust them where needed, returning a new object with differing message, or grouping duplicate errors, etc.

function processAjvErrors(originalErrors: ErrorObject[]) : MyCustomErrorObject[] {
  // ... adjust the errors to your needs
}