Method Err

x/errors/errors.go:304–335

Err sends the error's text as a message to the client. In exception, if the given "err" is a type of validation error then the Validation method is called instead.

(ctx *context.Context, err error)

// In exception, if the given "err" is a type of validation error
// then the Validation method is called instead.
func (e ErrorCodeName) Err(ctx *context.Context, err error) {
	if err == nil {
		return
	}

	if vErr, ok := err.(ValidationError); ok {
		if vErr == nil {
			return // consider as not error for any case, this should never happen.
		}

		e.Validation(ctx, vErr)
	}

	if vErrs, ok := err.(ValidationErrors); ok {
		if len(vErrs) == 0 {
			return // consider as not error for any case, this should never happen.
		}

		e.Validation(ctx, vErrs...)
	}

	// If it's already an Error type then send it directly.
	if httpErr, ok := err.(*Error); ok {
		if errorCode, ok := errorCodeMap[e]; ok {
			httpErr.ErrorCode = errorCode
			ctx.StopWithJSON(errorCode.Status, httpErr) // here we override the fail function and send the error as it is.
			return
		}
	}

	e.Message(ctx, err.Error())
}

// Log sends an error of "format" and optional "args" to the client and prints that
// error using the "LogError" package-level function, which can be customized.