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POPlay Morphia, Cannot grab List Content of (Generic) Embedded Object
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  1. POPlay Morphia, Cannot grab List Content of (Generic) Embedded Object
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    copied!<p>I am working with Play Framework 1.2.5 and the morphia-1.2.9a module. I was originally using @Reference annotations on my models but due to the fact that (lazy=true) is not working on @Reference's, I needed to switch using ObjectIds. In an attempt to reduce rework and redundancies, I created the following MorphiaList:</p> <pre><code>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&lt;T extends MorphiaModel&gt; implements Iterable&lt;T&gt;{ @Embedded("ids") private List&lt;ObjectId&gt; modelIds; @Transient List&lt;T&gt; 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&lt;T&gt;(); this.modelIds = new ArrayList&lt;ObjectId&gt;(); } public int size() { System.out.println(modelIds.size()); return modelIds.size(); } public boolean add(T model) { return (this.models.add(model) &amp;&amp; this.modelIds.add((ObjectId) model.getId())); } public boolean remove(T model) { return (this.models.remove(model)&amp;&amp;this.modelIds.remove((ObjectId) model.getId())); } public boolean addAll(Collection&lt;? extends T&gt; models) { for(T model: models) { this.models.add(model); this.modelIds.add((ObjectId) model.getId()); } return false; } public List&lt;T&gt; 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.&lt;T&gt;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.&lt;T&gt;findById(id); } @Override public Iterator&lt;T&gt; iterator() { return this.getModelIterator(); } public Iterator&lt;T&gt; getModelIterator() { for(ObjectId oi: modelIds) { boolean found=false; for(T model: models) { if(oi==model.getId()) { found=true; break; } } if(!found) models.add(T.&lt;T&gt;findById(oi)); } return models.iterator(); } public boolean isEmpty() { return this.modelIds.isEmpty(); } public boolean contains(T t) { return this.modelIds.contains(t.getId()); } } </code></pre> <p>MorphiaModel is simple, I just needed it to implement Comparable so I could sort my lists:</p> <pre><code>package models.morphia; import play.modules.morphia.Model; public abstract class MorphiaModel&lt;T extends MorphiaModel&lt;T&gt;&gt; extends Model implements Comparable&lt;T&gt;{ } </code></pre> <p>Then I use it like this in my classes:</p> <pre><code>@Entity public class Organization extends Purchasable { @Embedded public MorphiaList&lt;Season&gt; seasons = new MorphiaList&lt;Season&gt;(); </code></pre> <p>Once I add a season, mongo shows the expected:</p> <pre><code>{ "_id" : { "$oid" : "50097c147aa33c43fa8136ee"} , ...other members... "seasons" : { "ids" : [ { "$oid" : "50097c147aa33c43fa8136ed"}]} , ...other members... } </code></pre> <p>When I go to grab the seasons object though, modelIds is empty! I'm not sure why it can't grab seasons from the BSON, it's obviously there. Any help is greatly appreciated!</p>
 

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