ActiveAndroid中的多参数

Question

我在我的项目中使用ActiveAndroid作为ORM系统，我使用这行代码进行Query over database

 List<Chats> s = new Select()
                .from(Chats.class)
                .where(col_conversation + " = ?  and " + col_sender + " = ? and " + col_body + " = ?",conversation.getId(),sender.getId(),body)    .execute();

但它获取0行作为结果。 我确信我在数据库中有这样的行。

Answer 1

另一种方法是使用几个where子句来执行多参数查询：

List<Chats> s = new Select()
            .from(Chats.class)
            .where(col_conversation + " = ?",conversation.getId())
            .where(col_sender + " = ?", sender.getId())
            .where(body + " = ?", body)
            .execute();

Answer 2

你最没有传递任何参数并将你的选择查询更改为：

List<Chats> s = new Select()
                .from(Chats.class)
                .where(col_conversation + " = " + conversation.getId() + " and " + col_sender + " = " + sender.getId() + " and " + col_body + " = '" + body + "'")

                .execute();