On Wednesday 24 July 2013 11:52:36 Alan Etkin wrote:
> Also I concluded that because all the references are replaced by mongodb id's
> it is not possible to say > dump a table with references in one database and
> then restore it on mongodb.
Neither you can (or should) with other adapters, for example, postgres. Here's
section of the book about that issue:
"... In order to make a record uniquely identifiable across databases, they
must:
* have a unique id (UUID),
* have an event_time (to figure out which one is more recent if multiple
copies),
* reference the UUID instead of the id.
..."
Agreed, but because mongodb is a nosql you could push this away to the
developer. (What I am not abviously)
> ... Because you have no relation between the records anymore.
There's a possible bug with the import feature or the mongodb adapter. Maybe
you can file an issue in the project page adding as many info as possible to
reproduce the problem. While changing the id numbers, the id references should
be preserved between records.
I am going to see if I can create a testcase to reproduce the error, maybe its
because of the order of the data in db.py
>
#I am curious about the reason, would het not be smarter to just keep the
original id's ? Afterall mongodb uses _id. So it does not bite.
I did so forget about that :-) Thanks for reminding me.
And thanks for taking the time to answer me. Its very much appreciated.
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