Thanks for the reply,

For example when a user1 is registered he will upload his phonebook to be 
added as contacts, whoever is registered users in that phonebook they will 
be added to friends relation of user.

But whoever is not registered will not be added as their records will be 
non existent.

But when any of those unregistered users in the phonebook has registered 
later, then how can I push them as friends to user1.

Before I was maintaining it in mySQL table and pushed them to friends list 
once they are registered using triggers. Now I am moving my entire system 
to orientDB and looking for best schema design for storing private and 
group messages, users and their relations. Could you please help me on 
this. This is very urgent for me.



On Wednesday, June 11, 2014 3:01:02 PM UTC+5:30, Artem Orobets wrote:
>
> Hi Prathap,
>
> Sorry, I'm not really understand what do you want to achieve. Could you 
> describe your data model and what manipulation do you want to do?
>
> Best regards,
> Artem Orobets
>
> * Orient Technologiesthe Company behind OrientDB*
>  
>
> 2014-06-11 10:44 GMT+03:00 Prathap Reddy <[email protected] <javascript:>
> >:
>
>> I have a whatsApp like chat application where users can upload contacts 
>> and they will be automatically added to contact list. So when a user upload 
>> his contacts it will add them all to his friends list. It works fine using 
>> vertex and edge concept. But For example a user who is not registered, but 
>> later registered as user, how can I add them automatically to previous 
>> user's contact list as the current user is after the previous user is 
>> registered. 
>>
>> What I have in mind is maintaining unregistered contacts in separate DB 
>> and whenever user is registered add them to his contact list, but it will 
>> increase the DM operations.
>>
>> Please help me on this. I am struck with this.
>>  
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