[Typo3-dev] How to create an UPDATE-Option in my plugin ?

[Zach Davis]

Stefan Geith wrote:
> Ries van Twisk schrieb:
> 
>> Stefan,
>> can you explain a little more about this???
>>
>>> could someone give me a hint, how I can create
>>> an update-option in the extensions-menu for my plugin ?
>>> Where do I register the function, that does the update ?
> 
> 
> When a new Version of my Plugin uses some db-field in
> another way than before, then I must have an Update-Function,
> when updating to the new Version - like in tt_news, where
> the category-filed was changed.
> 
> I have seen, that I must create a class-file named
> "class.ext_update.php", but I can't find information
> about the contents of this file an how it is
> integrated in typo3.
> 
> -
> 
> Stefan

Make class.ext_update.php and put two functions in it. Call one "access" 
-- this is called by typo3, I think, and it checks if the script 
can/should be run. If access returns true, typo3 calls another function 
called "main", which then does whatever you want it to do.  This is how 
I did it in the chc_forum extension -- might be helpful to look at the 
update script in there.

best,
Zach