CODEWITHSUNDEEP
mongodbmappingmorphia
fivetech
fivetech

Reputation: 361

Mapping POJOs and Using Reference in MongoDB using Morphia

I have two model classes. One is Company.java, another is HumanResource.java.

Company.java 

@Entity("companies")
public class Company {
@Id
private ObjectId id = new ObjectId();
private String companyName;
private String emailAddress;
private String pictureUrl;
@Reference
private List<HumanResource> humanResources;
...

HumanResource.java

@Entity("humanresources")
public class HumanResource {
@Id
private ObjectId id = new ObjectId();
private String firstName;
private String lastName;
private String emailAddress;
@Reference
private Company company;
...

What I want to achieve is when I save a list of companies to datastore, related list of human resources documents should be inserted automatically.

In addition, I declared 

@Id
private ObjectId id = new ObjectId();

in every model class. Is it a good way or should I change it ?

Upvotes: 0

Views: 528

Answers (1)

evanchooly
evanchooly

Reputation: 6243

Morphia will not call save() on those references. You must call save() on the instances you want to persist. You can pass in a list of instances so you needn't loop, necessarily, but each instance needs to get passed in explicitly.

Upvotes: 1

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