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From: Scott Hernandez <scotthernan...@gmail.com>
Date: Mon, 30 Jul 2012 07:33:03 -0400
Message-ID: <CALOM=qh1ArQSa5Uid2qzwT4NcLX8+A_KWAH3VJ=aSpd+YoG...@mail.gmail.com>
Subject: Re: [morphia] @reference and error : @Id field cannot be nul
To: morphia@googlegroups.com
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I'm not sure I understand. Here is a description of what an ObjectId
is: http://www.mongodb.org/display/DOCS/Object+IDs

They are like UUIDs and you can create many at the same time and they
will all be different.

On Mon, Jul 30, 2012 at 3:21 AM, lolveley <lolve...@laposte.net> wrote:
> hi scott
>
> I understood your answer but I have a question : if I create the objectId=
 at
> the same time as the creation of the class, how the computer can set a
> objectId different than the objectId already stored in the base? I mean a=
re
> the objectId differents one from another? how is it made?
>
> Le dimanche 29 juillet 2012 20:45:58 UTC+2, Scott Hernandez a =C3=A9crit =
:
>>
>> Just change your entities to declare the id field with an initial value:
>>
>>         @Id ObjectId id =3D new ObjectId();
>>
>> The id will be assigned during your save, but not by the server. So
>> either way the client will have to create the ObjectId.
>>
>>
>