java - 当 yml 文件包含 Object 且 Map 引用另一个对象时，fixtures loadModel 无法正确加载

Question

初始化数据样本.yml

Book(a): &a
  title: Play in Action
  price: 30.00

Book(b): &b
  title: Alice in Wonderland
  price: 12.00

Person(b):
  name: Bob Joe
  ratings:
    ? *a: 8
    ? *b: 8

Person 的 Java 类定义

@Entity
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Person extends Model
{
    public String name;

    // choice and importance score
    @ElementCollection(targetClass=Integer.class)
        @MapKeyClass(Book.class)
    public Map<Book, Integer> ratings;
}

Fixture.loadModels("init-datasample.yml") 不加载上面定义的初始评级。我试着不放&a,&b，也没用。有人可以帮忙吗？

谢谢。

Answer 1

好的，解决了。想在这里分享。如果有人可以查看并认为值得提交 git 源代码，请帮助这样做。

问题是目前不支持嵌入式。所以 Fixtures 类中的 resolveDependencies 并没有解析定义的映射中的引用。

我目前的工作是扩展 Fixtures 类，并隐藏 loadModels 方法。和在

的代码块内

Fixtures.loadmodels(String name, Map<String, Object> idCache) {

... ...
                            if (f.getType().isAssignableFrom(Map.class)) {

/* new below */
                                    ElementCollection ec = f.getAnnotation(ElementCollection.class);
                                    MapKeyClass mkc = f.getAnnotation(MapKeyClass.class);
                                    if (ec != null && mkc != null) {
                                        Map mapper = (Map) objects.get(key).get(f.getName());
                                        if (mapper == null) continue;
                                        Class targetClass = ec.targetClass();
                                        Class mapKeyClass = mkc.value();
                                        Map<Object, Object> fieldValue = new HashMap();
                                        for (Object k : mapper.keySet()) {
                                            Object mapKey = retrieveObject(mapKeyClass, k, idCache);
                                            Object targetValue = retrieveObject(targetClass, mapper.get(k), idCache);
                                            fieldValue.put(mapKey, targetValue);
                                        }
                                        f.set(model, fieldValue);
                                    } else {
                                        f.set(model, objects.get(key).get(f.getName()));
                                    }
                                }

... ...

}

/* new method below */
private static Object retrieveObject(Class targetClass, Object alias, Map<String, Object> idCache)
    {
        if (targetClass.isAssignableFrom(alias.getClass())) {
            return alias;
        }

        Object targetValue = idCache.get(targetClass.getCanonicalName() + "-"+ alias);

        if (targetValue != null) {
            targetValue = Model.Manager.factoryFor(targetClass).findById(targetValue);
        }else {
            try {
                targetValue = targetClass.getConstructor(String.class).newInstance(alias.toString());
            } catch(Exception ex) {
                ex.printStackTrace();
                return null;
            }
        }

        return targetValue;
    }