[Puppet Users] misconceptions

[udo waechter]

Hello again,

on the 
http://reductivelabs.com/trac/puppet/wiki/CommonMisconceptions#class-inheritance-and-variable-scope

Page, the example is that:

#Ex:1
class one {
        notice(" VAR IS: ${var})
}

class two {
        $var = "test"
        include one
}

should give me nothing in class "one" and "test" in class "two".

This is ok so far.


#Ex:2
class zero {
        notice ("This is class zero, and I do not care about 'var' at all")
}

class one inherits zero {
        notice(" VAR IS: ${var})
}

class two {
        $var = "test"
        include one
}



#Ex:3
class one {
        include zero
        notice(" VAR IS: ${var})
}

which is somewhat in sync with the documentation.





Thanks,
udo.
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Now I have stumbled upon the situation where I have something in the line of: Now $var is not set in both: class one and two. The solution is of course to have: Anyway, I was wondering why Ex:2 does not work, since "class zero" does not do anything with "class one", especially not with $var. Somehow I would guess that inheriting a class does add "attributes" to a class and not overwrite/delete "attributes" that the inheriting class defines. Can someone shed some light on this issue? I guess I misinterpret inheritance in puppet.

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