如何在Android中使用Realm数据库更新行？

Question

这是我的代码

if (userDetailRealmModel.getuID() != i) {
      userDetailRealmModel.setUser_id(userDetailModelArrayList.get(i).getUser_id());
      userDetailRealmModel.setFirstname(userDetailModelArrayList.get(i).getFirstname());
      userDetailRealmModel.setLastname(userDetailModelArrayList.get(i).getLastname());
      userDetailRealmModel.setEmail(userDetailModelArrayList.get(i).getEmail());
      userDetailRealmModel.setPhone_no(userDetailModelArrayList.get(i).getPhone_no());
      userDetailRealmModel.setLatitude(userDetailModelArrayList.get(i).getLatitude());
      userDetailRealmModel.setLongitude(userDetailModelArrayList.get(i).getLongitude());
      userDetailRealmModel.setIs_private(userDetailModelArrayList.get(i).getIs_private());
      userDetailRealmModel.setCreation_datetime(userDetailModelArrayList.get(i).getCreation_datetime());
      userDetailRealmModel.setUpdate_datetime(userDetailModelArrayList.get(i).getUpdate_datetime());

      realm.copyToRealmOrUpdate(userDetailRealmModel);
      //userDetailRealmModelArray.add(userDetailRealmModel);  
    }

我想更新我的数据库，但是无法正常工作

Answer 1

如果您有包含userDetailModelArrayList列表的RealmObjects ，则可以使用以下命令更新数据库

    if (userDetailRealmModel.getuID() != i){
       realm.beginTransaction();
       realm.copyToRealmOrUpdate(userDetailModelArrayList.get(i));
       realm.commitTransaction();
    }

它将使用对象的主键更新您的领域数据库行。

如果列表中没有领域对象，则必须按如下所示手动更新它：

   if (userDetailRealmModel.getuID() != i) {
          realm.beginTransaction();
          userDetailRealmModel.setUser_id(userDetailModelArrayList.get(i).getUser_id());
          userDetailRealmModel.setFirstname(userDetailModelArrayList.get(i).getFirstname());
          userDetailRealmModel.setLastname(userDetailModelArrayList.get(i).getLastname());
          userDetailRealmModel.setEmail(userDetailModelArrayList.get(i).getEmail());
          userDetailRealmModel.setPhone_no(userDetailModelArrayList.get(i).getPhone_no());
          userDetailRealmModel.setLatitude(userDetailModelArrayList.get(i).getLatitude());
          userDetailRealmModel.setLongitude(userDetailModelArrayList.get(i).getLongitude());
          userDetailRealmModel.setIs_private(userDetailModelArrayList.get(i).getIs_private());
          userDetailRealmModel.setCreation_datetime(userDetailModelArrayList.get(i).getCreation_datetime());
          userDetailRealmModel.setUpdate_datetime(userDetailModelArrayList.get(i).getUpdate_datetime());
          realm.copyToRealmOrUpdate(userDetailRealmModel);
          realm.commitTransaction(); 
        }

Answer 2

尝试这个

if (userDetailRealmModel.getuID() != i) {
      userDetailRealmModel.setUser_id(userDetailModelArrayList.get(i).getUser_id());
      userDetailRealmModel.setFirstname(userDetailModelArrayList.get(i).getFirstname());
      userDetailRealmModel.setLastname(userDetailModelArrayList.get(i).getLastname());
      userDetailRealmModel.setEmail(userDetailModelArrayList.get(i).getEmail());
      userDetailRealmModel.setPhone_no(userDetailModelArrayList.get(i).getPhone_no());
      userDetailRealmModel.setLatitude(userDetailModelArrayList.get(i).getLatitude());
      userDetailRealmModel.setLongitude(userDetailModelArrayList.get(i).getLongitude());
      userDetailRealmModel.setIs_private(userDetailModelArrayList.get(i).getIs_private());
      userDetailRealmModel.setCreation_datetime(userDetailModelArrayList.get(i).getCreation_datetime());
      userDetailRealmModel.setUpdate_datetime(userDetailModelArrayList.get(i).getUpdate_datetime());

      realm.beginTransaction();
           realm.copyToRealmOrUpdate(userDetailRealmModel); //pass your object
           realm.commitTransaction(); 
    }

更新

请卸载您的应用程序，然后再次清理build-> rebuild and install。

检查这个