在Android特定ID室插入行

Question

我正在尝试使用Android的SQLite包装器Room在特定ID处插入一行。

[基本上，用例是我从服务器获取一行数据，并且我希望将远程行的ID用作Room中本地存储行的主键。

代码：

@Entity
class UserModel {
    @PrimaryKey
    public int id;

    public String firstName;
    public String lastName;
}

---

@Dao
public interface UserDAO {

    /**
     * Select all Users from the User table.
     *
     * @return all users.
     */
    @Query("SELECT * FROM " + UserRoomDB.TABLE_NAME)
    UserModel getUser();


    /**
     * Insert a user in the database. If the user already exists, replace it.
     *
     * @param user the user to be inserted.
     */
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    void insertUser(UserModel user);

    /**
     * Update a user.
     *
     * @param user task to be updated
     * @return the number of users updated. This should always be 1.
     */
    @Update
    int updateUser(UserModel user);

}

---

private void cacheUser(UserModel userModel){
        UserRoomDB db = Room.databaseBuilder(this.appContext,
                UserRoomDB.class, UserRoomDB.DB_NAME).build();
        db.userDAO().insertUser(userModel);
}

Answer 1

据我所能在您的代码中看到的，您正在获取表名而不是ID本身的用户