Question

我有这些实体：

public class Category {

    private Long id;
    private String name;
    private Integer color;
}

public class Item {

    private Long id;
    private String name;
    private String groupType;
    private Category category;
}

我应该如何建模greenDAO以在Item对象中包含Category？

修改

生成器代码：

public class GreenDaoGenerator {

    public static final String DEFAULT_PACKAGE = "xxxxx";

    public static void main(String[] args) throws Exception {
        Schema schema = new Schema(1, DEFAULT_PACKAGE + ".entity");
        schema.setDefaultJavaPackageDao(DEFAULT_PACKAGE + ".dao");

        addCategory(schema);
        addItem(schema);

        DaoGenerator daoGenerator = new DaoGenerator();
        daoGenerator.generateAll(schema, "Generated Files");
    }

    private static void addItem(Schema schema) {
        Entity entity = schema.addEntity("Item");
        entity.addIdProperty();
        entity.addStringProperty("Name");
        entity.addStringProperty("GroupType");
        Property IdProperty = entity.addLongProperty("categoryId").getProperty();
        entity.addToOne(schema.getEntities().get(0), IdProperty);
    }

    private static void addCategory(Schema schema) {
        Entity entity = schema.addEntity("Category");
        entity.addIdProperty();
        entity.addStringProperty("Name");
        entity.addIntProperty("Color");
    }

}

我在你回答后做了，请看看我是否正确地做了。感谢。

Answer 1

您必须使用GreenDao Relations，将a1 = 'aaaaa'实体映射到Item实体。

以下是一个示例（其中Category和item是您的greenDAO生成器代码中的实体）：

category

如何使用greenDAO将对象加载到另一个对象中？

1 个答案: