Building Enterprise JavaScript Applications

Generating validation error messages

When our object fails validation, we should generate the same human-readable error messages as we did before. To do this, we must process the errors stored at ajvValidate.errors, and use them to generate human-readable messages. Thus, create a new module at src/validators/errors/messages.js, and copy the following message generator:

function generateValidationErrorMessage(errors) {  const error = errors[0];  if (error.dataPath.indexOf('.profile') === 0) {    return 'The profile provided is invalid.';  }  if (error.keyword === 'required') {    return 'Payload must contain at least the email and password fields';  }  if (error.keyword === 'type') {    return 'The email and password fields must be of type string';  } if ...