Re: [morphia] Error using Reference Mapping

[Justin Lee]

Are you using at least 3.0.0 of the Java driver?

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{ name     : "Justin Lee", 

  title    : "Software Engineer",

  twitter  : "@evanchooly",

  web      : [ "10gen.com", "antwerkz.com" ],

  location : "New York, NY" }

On Mon, Jun 8, 2015 at 3:55 PM, Milson Munakami <mils...@gmail.com> wrote:

Hi there,

I am trying to follow this post: http://www.informit.com/guides/content.aspx?g=java&seqNum=639

And when I run the Main application it shows:

Exception in thread "main" java.lang.NoSuchMethodError: com.mongodb.DBRef.<init>(Lcom/mongodb/DB;Ljava/lang/String;Ljava/lang/Object;)V

at com.google.code.morphia.mapping.Mapper.keyToRef(Mapper.java:559)

at com.google.code.morphia.mapping.ReferenceMapper.writeSingle(ReferenceMapper.java:51)

at com.google.code.morphia.mapping.ReferenceMapper.toDBObject(ReferenceMapper.java:45)

at com.google.code.morphia.mapping.Mapper.writeMappedField(Mapper.java:529)

at com.google.code.morphia.mapping.Mapper.toDBObject(Mapper.java:442)

at com.google.code.morphia.mapping.Mapper.toDBObject(Mapper.java:426)

at com.google.code.morphia.DatastoreImpl.entityToDBObj(DatastoreImpl.java:674)

at com.google.code.morphia.DatastoreImpl.save(DatastoreImpl.java:722)

at com.google.code.morphia.DatastoreImpl.save(DatastoreImpl.java:793)

at com.google.code.morphia.DatastoreImpl.save(DatastoreImpl.java:787)

at gpms.gui.MorphiaReferenceExample.main(MorphiaReferenceExample.java:81)

What can be the reason for this issue and how to solve it.

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[Justin Lee]

Then are you using Morphia 1.0.0?

--------------------------------

{ name     : "Justin Lee", 

  title    : "Software Engineer",

  twitter  : "@evanchooly",

  web      : [ "10gen.com", "antwerkz.com" ],

  location : "New York, NY" }

On Mon, Jun 8, 2015 at 4:10 PM, Milson Munakami <mils...@gmail.com> wrote:

HI Justin,

I am using mongo-java-driver-3.0.0.jar.

[Justin Lee]

I'm pretty sure you have old versions of libraries in your classpath.  That method call doesn't exist in the code.  If you're using maven, use "mvn dependencies" to double check.  If you're seeing this in your IDE, check that it's not point to old versions of something.  Also, make sure you're doing a clean then a build and see if the error persists.

--------------------------------

{ name     : "Justin Lee", 

  title    : "Software Engineer",

  twitter  : "@evanchooly",

  web      : [ "10gen.com", "antwerkz.com" ],

  location : "New York, NY" }

On Mon, Jun 8, 2015 at 5:03 PM, Milson Munakami <mils...@gmail.com> wrote:

yeah I update the Maven dependency to Morphia 1.0.0 Still can't say why this mapping issue is occurring? I could not save the Family collection but the User collection is saving correctly.

The Family class is :

@Entity

public class Family {

@Id

private ObjectId id;

private String surname;

@Reference

private User dad;

@Reference

private User mom;

@Reference

private List<User> children = new ArrayList<User>();

[Justin Lee]

Any time.  Glad it's fixed.

--------------------------------

{ name     : "Justin Lee", 

  title    : "Software Engineer",

  twitter  : "@evanchooly",

  web      : [ "10gen.com", "antwerkz.com" ],

  location : "New York, NY" }

On Mon, Jun 8, 2015 at 5:34 PM, Milson Munakami <mils...@gmail.com> wrote:

The problem may be due to cleaning up the Maven Repo. Yes, Justin I did clean up and Project >> clean and Maven Update so it is working fine now.

Thanks for the help.