[TYPO3-mvc] Proposal: mixed-ins for extbase

[Franz Koch]

Hey Helmut,
...

the concept sounds nice, but also has a downside, see below:

> Disadvantages:
> * The autoloader is probably not the nicest place to have this
> functionality (however it would be possible to implement it into an
> object manager).
>
> * It will be difficult to have proper error handling, giving nice errors
> if the mixin conflicts with already defined methods or properties.

that wouldn't be such a big loss compared to the benefits I think.

> * It is not possible to override methods within a mixin (which might be
> a bad idea anyways)

I think this has to be possible via whatever approach - so the current 
concept is not yet a final solution and needs some more thoughts.

Just an example. Imagine you're extending a existing extension and add 
some new properties etc. Now imagine the domain model itself contains 
some domain logic you're additions also depend on. So you need a way to 
"hook" in there.
Or just imagine your new properties depend on another one and you 
yourself need to add domain logic to a existing setter in order to 
fulfill a dependency in your added property.
So there definitely has to be a way to override or better extend functions.

-- 
kind regards,
Franz Koch