Feature request: Custom error responses for hono/validator

Currently, when using the validator middleware, there’s no (nice) way of providing your own error responses when the request passes validation, resulting in a plaintext response that looks something like Invalid Value: the JSON body "name" is invalid - undefined. This isn’t ideal for an API where the main format is JSON.

This feature request is to allow people to deal with formatting the error themselves.

[yusukebe]

Hi! I have a few ideas on this matter. Please wait a moment, as I will introduce them later.

[yusukebe]

Hi @ThatOneBro !

Exactly. I am thinking the same thing and implementing it. For example, the result objects might look like this:

    [
      {
        isValid: true,
        message: undefined,
        target: 'header',
        key: 'x-number',
        value: '12345',
        ruleName: 'asString',
        ruleType: 'type',
        jsonData: undefined
      },
      {
        isValid: false,
        message: 'Invalid Value [12345]: the request header "x-number" is invalid - isEqual',
        target: 'header',
        key: 'x-number',
        value: '12345',
        ruleName: 'isEqual',
        ruleType: 'value',
        jsonData: undefined
      }
    ]