数据库中有记录，对比过源码，bean代码一致，数据库也是直接用sql文件生成的，但是访问这个接口会报错：

@GetMapping("/test/{id}")
public Banner getById(@PathVariable(name = "id") Long id){
    return bannerService.getById(id);
}

​

Resolved [org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: Unable to find com.c1eye.server.model.Banner with id 4; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Unable to find com.c1eye.server.model.Banner with id 4 (through reference chain: com.c1eye.server.model.Banner$HibernateProxy$FVu66kTd["create_time"])]