On Mon, Sep 7, 2020, at 2:25 PM, goran.ter...@gmail.com wrote:
> I noticed that hyperkitty_import has issues with In-Reply-To header 
> when importing archives downloaded from Hyperkitty itself.
> 
> In some cases in_reply_to field in hyperkitty_email table will have 
> extra white space at the start.
> For example In-Reply-To: 
> cafv2ywofzrhedttz3f6emnwx8sh4_ar7+jmr7xvoad8_eoj...@mail.gmail.com 
> will be saved as ' CAFV2YWOfZRHEDTTz3F6Emnwx8Sh4_Ar7+JMR7XvOAD8_eOjqaQ'.
> 
> This results in broken threads, as parent of this message cannot be found.
> 
> I also noticed that hyperkitty_import doesn't have this problem with 
> archives from MM2, but in MM2 archives, message id in in-reply-to 
> header is
> surrounded with brackets, like this: In-Reply-To: 
> <cafv2ywofzrhedttz3f6emnwx8sh4_ar7+jmr7xvoad8_eoj...@mail.gmail.com>
> 
> When I look at original email source, in-reply-to header doesn't have 
> brackets; it looks like in the archive made by HK.
> 
> Is the issue here with import or export (download) process?
> Is hyperkitty_import right tool for migrating lists from one MM3 server 
> to another?

The import process should be fine, the issues are more likely with 
download/export process.

Internally, Hyperkitty doesn't store the original email objects, only some of 
the headers and body of the message. It then generates the export archive 
on-demand by creating the Email object and stitching them together for mbox 
archive.

You can just take a database dump and migrate that. If you are using postgres, 
there is a pg_dump command that I know of. I am sure something exists for 
Mysql/mariadb too. I would recommend using this method for migrations.

You can also use django's dumpdata[1] and loaddata commands to export and 
import data from one installation to other. It should work when moving from one 
database type to other in theory. I haven't tested it to comment on how 
successful it would be. 
 

[1]: https://docs.djangoproject.com/en/3.0/ref/django-admin/#dumpdata

> I was thinking should I post this to the mm3-users list or here, I hope 
> I made a right decision.
> 
> Regards,
> Goran T.
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-- 
  thanks,
  Abhilash Raj (maxking)
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