Playframework 播放Morphia,无法获取(通用)嵌入对象的列表内容
我正在使用Play Framework 1.2.5和morphia-1.2.9a模块。我最初在模型上使用@Reference注释,但由于(lazy=true)不在@Reference上工作,我需要切换使用objectid。为了减少返工和冗余,我创建了以下形态学家:Playframework 播放Morphia,无法获取(通用)嵌入对象的列表内容,playframework,morphia,playframework-1.x,Playframework,Morphia,Playframework 1.x,我正在使用Play Framework 1.2.5和morphia-1.2.9a模块。我最初在模型上使用@Reference注释,但由于(lazy=true)不在@Reference上工作,我需要切换使用objectid。为了减少返工和冗余,我创建了以下形态学家: package models.morphia; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; impor
package models.morphia;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import models.Team;
import org.bson.types.ObjectId;
import com.google.code.morphia.annotations.Embedded;
import com.google.code.morphia.annotations.Transient;
import play.modules.morphia.Model;
@Embedded
public class MorphiaList<T extends MorphiaModel> implements Iterable<T>{
@Embedded("ids") private List<ObjectId> modelIds;
@Transient List<T> models;
public void sort()
{
this.getAll();
Collections.sort(models);
this.modelIds.clear();
for(T t:this.models){
this.modelIds.add((ObjectId)t.getId());
}
}
public MorphiaList()
{
this.models = new ArrayList<T>();
this.modelIds = new ArrayList<ObjectId>();
}
public int size()
{
System.out.println(modelIds.size());
return modelIds.size();
}
public boolean add(T model)
{
return (this.models.add(model) && this.modelIds.add((ObjectId) model.getId()));
}
public boolean remove(T model)
{
return (this.models.remove(model)&&this.modelIds.remove((ObjectId) model.getId()));
}
public boolean addAll(Collection<? extends T> models)
{
for(T model: models)
{
this.models.add(model);
this.modelIds.add((ObjectId) model.getId());
}
return false;
}
public List<T> getAll()
{
for(ObjectId oi: this.modelIds)
{
boolean found=false;
for(T model: models)
{
if(oi==model.getId())
{
found=true;
break;
}
}
if(!found)
models.add(T.<T>findById(oi));
}
return models;
}
public T get(int index)
{
ObjectId id = modelIds.get(index);
for(T model: models)
{
if(id == model.getId())
return model;
}
return T.<T>findById(id);
}
@Override
public Iterator<T> iterator() {
return this.getModelIterator();
}
public Iterator<T> getModelIterator() {
for(ObjectId oi: modelIds)
{
boolean found=false;
for(T model: models)
{
if(oi==model.getId())
{
found=true;
break;
}
}
if(!found)
models.add(T.<T>findById(oi));
}
return models.iterator();
}
public boolean isEmpty() {
return this.modelIds.isEmpty();
}
public boolean contains(T t) {
return this.modelIds.contains(t.getId());
}
}
但当我去抓取seasons对象时,modelIds是空的!我不知道为什么它不能从BSON那里抓住季节,它显然在那里。非常感谢您的帮助 由于多种原因,我无法实现此功能:
@Reference public List<Season> seasons;
此beforeSave()必须为代码中的每个额外引用列表展开。故事的寓意:
如果您正在使用Play的morphia模块,请不要使用@Reference符号
@Entity
public class Organization extends Purchasable {
@Embedded public MorphiaList<Season> seasons = new MorphiaList<Season>();
{
"_id" : { "$oid" : "50097c147aa33c43fa8136ee"} ,
...other members...
"seasons" : { "ids" : [ { "$oid" : "50097c147aa33c43fa8136ed"}]} ,
...other members...
}
@Reference public List<Season> seasons;
@Transient public List<Season> seasons;
private List<ObjectId> _seasons = new ArrayList();
@Transient private List<Season> pSeasons;
public List<Season> getSeasons()
{
if(pSeasons==null)
{
if(_seasons.size()!=0)
pSeasons = Season.find().<Season>field("_id").in(_seasons).asList();
else
pSeasons = new ArrayList();
}
return pSeasons;
}
@PrePersist void beforeSave()
{
if(pSeasons!=null)
{
_seasons.clear();
for(Season s: pSeasons)
{
_seasons.add((ObjectId)s.getId());
}
}
}