Question

我刚刚要创建一个样本，以便正确理解ORMLite的Hello Android如何在Android中运行。

    public class SchoolDataBean {


// id is generated by the database and set on the object automagically
@DatabaseField(generatedId = true)
int rollNo;
@DatabaseField(index = true)
String name;
@DatabaseField
String gender;
@DatabaseField
boolean presence;

public SchoolDataBean() {
//required by ORM :)
}

public void setRollNo(int rollNo) {
    this.rollNo = rollNo;
}

public void setName(String name) {
    this.name = name;
}

public void setGender(String gender) {
    this.gender = gender;
}

public void setPresence(boolean presence) {
    this.presence = presence;
}

}

在我尝试插入初始值并使用

创建表时，在数据库助手中

      SchoolDataBean schoolDataSecond = new SchoolDataBean();
    schoolDataSecond.setName("Ram");
    schoolDataSecond.setGender("F");
    schoolDataSecond.setPresence(true);
    schoolDataSecond.setRollNo(2);
    dao.create(schoolDataSecond);

我从ORMLite库中得到了这个例外

  sqlite returned: error code = 1, msg = duplicate column name: gender

   java.sql.SQLException: SQL statement failed: CREATE TABLE `schooldata` (`rollNo` INTEGER PRIMARY KEY AUTOINCREMENT , `name` VARCHAR , `gender` VARCHAR , `gender` VARCHAR , `presence` SMALLINT )

谢谢大家。

      The Exception seems to be caused at this line
        TableUtils.createTable(connectionSource, SchoolDataBean.class);

Answer 1

实际上我没有意识到我需要检查Config.txt中的列名，也就是说，两个相似的列名称导致了这个重复问题。

使用ORMLite for Android，允许创建具有某些列名称的表

1 个答案: