Hibernate embedded map saving problem

Question

I've been having trouble with saving embedded collections. I've come up with this crazy solution because I wanted my lazily loaded models to sort based on fields in resources.

I have three tables:

• assets (id)
• assets_resources (asset_id,resource_id,primary_image)
• resources (id,logical_name)

I have defined the tables with hibernate annotations like so: Assets.java:

@Entity
@Table(name = "assets")
public class Asset implements java.io.Serializable {
@OneToMany
@Cascade(CascadeType.ALL)
@JoinTable(
name="assets_resources"
, joinColumns=@JoinColumn(name="asset_id")
, inverseJoinColumns=@JoinColumn(name="resource_id")
)
@MapKeyColumn(name="asset_id")
@OrderBy("logical_name")
private Map<AssetResource, Resource> resources;
public Map<AssetResource, Resource > getResources() {return resources;}
public void setResources(Map<AssetResource, Resource> resources) {this.resources = resources;}
}

assetResource.java

@Embeddable
public class AssetResource {
private Boolean primary_image;
public Boolean getPrimaryImage() {return primary_image;}
public void setPrimaryImage(Boolean primary_image) {this.primary_image = primary_image;}

private Long id;
public Long getId() {return id;}
}

resource.java

@Entity
@Table(name="resources")
public class Resource implements java.io.Serializable {
...
public String logical_name;
public String getLogicalName() {return logical_name;}
public void setLogicalName(String logical_name) { this.logical_name = logical_name;}
}

I can iterate though the lazily loaded maps in my controllers but I can't seem to save/update embedded fields. specifically, I can't update the primary_image field.

---

This link demonstrates what I was trying to do.

Answer 1

Are you able to save the attribute value in database. Because i think you won't be able to save the value as u have not mapped it with some column in the database. Try removind Emmbedded and then add the table and column attributes..