Question

我面临的问题是对数据表的列role（Lazy DataModel）进行过滤/排序，该列不是实体类的属性，因为列值是动态创建的依赖于当前登录的用户，当前登录的用户对于某些行可能为user，对于某些行可能为manager。

例如，我有实体类Activity实体类的两个属性是：

@javax.persistence.Entity
@Table(name = "ACTIVITY")
public class Activity extends Entity {
private Set<User> users;
private Set<User> managers;
}

如果当前登录用户位于特定活动行的managers，则该行的role（不在Activity实体中的列）将为Manager。如果当前登录的用户位于特定活动行的users，则该行的role将为user。如何实现？谁能帮我？任何指针对我都非常有帮助。谢谢

更新-1： role列值正确显示。在实体类中，我用这种方式计算role：

@Transient
public String getRole(){
    String role="";
    //calculate role depending on currettly logged in user..
    return role;
}

现在，当我要过滤时，会生成异常：

ERROR [com.edfx.adb.web.model.ActivityDataModel] null: org.hibernate.QueryException: could not resolve property: role of: com.edfx.adb.persist.entity.Activity

我将如何克服这个问题？

更新-2

ActivityDao课程：

public List<Activity> loadActivities(int startIndex, int maxResult, String sortField, boolean sortOrder, Map<String, Object> filters) {
    Criteria criteria = getSessionFactory().getCurrentSession().createCriteria(entityClass, "act");
    createActivitiesFilterCriteria(criteria, filters);
    return (List<Activity>) criteria.list();
}
private void createActivitiesFilterCriteria(Criteria criteria, Map<String, Object> filters) {
  HttpSession session = (HttpSession)  FacesContext.getCurrentInstance().getExternalContext().getSession(true);
  String userName = session.getAttribute("username").toString();

  if(filters.containsKey("role")){
  String value = (String) filters.get("role");
  if(!value.equals("all")){
    criteria.add(Restrictions.eq("getRole();", value));

   }
  filters.remove("role");
  }
  for (Entry<String, Object> entry : filters.entrySet()) {
  String key = entry.getKey();
  Object value = entry.getValue();

  criteria.add(Restrictions.ilike(key, value.toString(), MatchMode.ANYWHERE));
  }
}

ActivityDataModel的代码：

@Override
public List<ActivityDTO> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, String> filters) {
    Map<String, Object> daoFilters = new HashMap<String, Object>();
    Map<String, Object> totalFilters = new HashMap<String, Object>(daoFilters);

    try {
        activityDTOs = activityService.loadActivities(first, pageSize, sortField, order, daoFilters);
        setRowCount(activityService.getTotalNoOfFilteredActivity(totalFilters));
        } catch (Throwable throwable) {
    }
return activityDTOs;
}

排序/过滤动态生成的<p：datatable> </p：datatable>列

0 个答案: