Java 外部字段类没有id字段

我在下面的实体中遇到错误（可能是因为一对多的关系），但我不知道如何解决这个问题

课程：

@ForeignCollectionField(eager = true)
Collection<Grade> grades;

@DatabaseField(columnName = "ID", canBeNull = false)
private long id;

@DatabaseField(columnName = "LABEL", canBeNull = false)
private String label;

@DatabaseField(columnName = "COEFFICIENT", canBeNull = false, defaultValue = "1")
private float coefficient;

@DatabaseField(columnName = "ID_COURSE", canBeNull = false, foreign = true, foreignAutoRefresh = true)
Course course;

@DatabaseField(columnName = "ID", canBeNull = false)
private long id;

@DatabaseField(columnName = "DATE", canBeNull = false)
private Date date;

@DatabaseField(columnName = "GRADE", canBeNull = false, defaultValue = "1")
private float grade;

启动应用程序并尝试从数据库获取数据时：

外地班课程没有id字段

@DatabaseField(generatedId = true, columnName = "ID")
Long id;

---

课程类必须具有id字段

@DatabaseField(generatedId = true, columnName = "ID")
Long id;

或者通过以下方式将现有字段id设置为id：

@DatabaseField(id = true, columnName = "ID", canBeNull = false)
private long id;

---

也许可以将

foreignColumnName=“ID”

添加到

@DatabaseField

对

成绩的注释中。课程