Referring to the dev meeting and bug 22407, I propose the following rewording:

PERL15 Using Koha::Object[s]
PERL15(a) Code added to the Koha:: namespace should be object-oriented unless 
there is a very good reason to do otherwise. In that case the reason should be 
documented clearly.
PERL15(b) Code in Koha::Object[s] should normally not refer back to C4. 
Obviously, this cannot be enforced harshly until the refactoring has been 
completed.
PERL15(c) Use DBIC relations to (pre)fetch a related Koha object rather than 
searching it explicitly. (See bug 22407)


PERL28 Other object oriented code guidelines (in addition to PERL15)
I think we need to move the Accessor and idiom for -> new rules from PERL15 to 
another rule. I opened rule 28 for that depending on discussing the following:
Class::Accessor is a great way to provide access to member variables.
=> My suggestion would be to remove this rule. It is true but we do not say 
that it is the only way to do it. (We are not even using Class::Accessor in 
Koha objects.)
Or just say PERL28(a) To provide access to member variables, there are several 
ways including but not limited to using Class::Accessor.

A useful idiom for the ->new() routine in object-oriented classes that do not 
need to process the arguments passed in as a hashref but merely need to save 
them for future processing
=> This suggestion is fine. It says use a parameter hash for sub new. We 
normally do that. Reworded:
PERL 28(b) Use a hashref as second parameter in sub new when passing arguments.

Any feedback?

Marcel



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