Question

我有3个课程，分别是Professional，Doctor和Blog，如下所述：

public class Professional {
}

@DatabaseTable(tableName = "doctors", daoClass = DoctorDao.class)
public class Doctor extends Professional {
    @DatabaseField(columnName = "id", generatedId = true)
    Long id;

    @DatabaseField(columnName = "name")
    String name;

    public Doctor() {

    }
}

@DatabaseTable(tableName = "blogs", daoClass = BlogDao.class)
public class Blog<T> {
    @DatabaseField(columnName = "id", generatedId = true)
    Long id;

    @DatabaseField(columnName = "title")
    String title;

    @DatabaseField(columnName = "blog_of", foreign = true, canBeNull = false, foreignAutoCreate = true)
    T author;
}

我无法为Blog类创建DAO，因为我无法通过类Blog调用带有泛型参数的构造函数。博客的DAO是：

public interface BlogDaoInterface extends Dao<Blog<? extends Professional>, Long> {
}

public class BlogDao extends BaseDaoImpl<Blog<? extends Professional>, Long> implements BlogDaoInterface {

    public BlogDao(ConnectionSource connectionSource) throws SQLException {
        super(connectionSource, Blog<? extends Professional>.class);
    }
}

错误：ormlite无法创建Blog类（即BlogDao）的DAO。代码未成功编译。

我已经使用ormlite通过以下代码行创建表：

TableUtils.createTableIfNotExists(connectionSource, Blog.class);

但是Gradle显示以下错误：

无法从参数化类型中选择

在BlogDao类的构造函数中的以下行：

super(connectionSource, Blog<? extends Professional>.class);

正确的方法是什么？

在ORMlite中创建通用模型的DAO时出现问题

0 个答案: