ORMLite Android中的一对多关系 [英] One-To-Many relationship in ORMLite Android

问题描述

如何在ORMLite Android中实现一对多关系？

How do I implement one-many relationship in ORMLite Android?

请查看示例

public class A {
 private String name;
    @DatabaseField (foreign = true, foreignAutoRefresh = true, columnName = "A")
    private B b;
    @DatabaseField(columnName = "author")
    private String authorName;
}

public class B {
    @DatabaseField(generatedId = true, columnName = "id")
    private long id;
    @DatabaseField(columnName = "name")
    private String name;
    @ForeignCollectionField
    Collection<A> aees;
}

B有A的集合。我打电话给 dao .create（b）;

B has collection of A. I am calling dao.create(b);

现在我创建b的dao，因为b包含所有数据。但表B仅使用数据创建，A永远不会创建。请帮助一下？

Now i create dao of b, since b has all the data. But the table B has only created with data, A is never created. Kindly could some one help?

推荐答案

现在我创建了b的dao，因为b包含所有数据。但表B仅使用数据创建，A永远不会创建。请帮助一下？

Now i create dao of b, since b has all the data. But the table B has only created with data, A is never created. Kindly could some one help?

对。您需要使用以下内容创建 A 项目：

Right. You need to create the A items using:

for (A a : b.aees) {
   aDao.create(a);
}

ORMLite不会自动为您创建这些。

ORMLite does not automatically create those for you.

您可以查看外国收集示例程序。

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