大神帮忙看下这一小段代码 是不是有问题？

Question

def getIviOsTotal (Integer iviOsTotal) {

    IntravitrealInjection ivi = IntravitrealInjection.get(iviOsTotal)

    if (ivi != null){
           def os = IntravitrealInjection.findWhere(injectionsTotal: ivi, eye: Eye.LEFT_EYE)
           return os.getInjectionsTotal()
    }

    else {
        return "0"
    }
}