Details
Bug
Closed
Minor
Description
We can now have NULL fields in database, however currently we have no way of representing them in the xml for backups. If we have <data></data> it gets read as an empty string by restore. We plan to use a special string NULL to indicate a value of NULL in the xml, and restore that value during restore using insert_record().
-Add special NULL string to "full_tag()"
-Recover special NULL string from "backup_todb()"
Activity
- All
- Comments
- History
- Activity
- Source
- Test Sessions
Hi Wen,
I really think this haven't been ported to previous releases because NULL treatment wasn't necessary before 1.9. Until then, all fields in Moodle had some 0 (for ints) and empty string (for varchars) default, so we were NULL-free.
The cause for these defaults is one historic MySQL limit (3.x series if I'm nor wrong). But we have been started to use proper NULLs since 1.9 (and their use will grow, for sure). But not before 1.9.
So, my +1 to reclose this as is now. Ciao 
Sounds peeeerfect!