On Oct 7, 2010, at 5:09 PM, kevinpfromnm wrote:
> doh, I'm sorry. sleep deprived lately.
>
> watch your solution there as it will grab every other user so if your
> user base is large, that will be a real memory hog/slowdown.
>
> could try (I'm not sure if acting_user is defined at this point or
> not), "User unless owner_is? acting_user" # using owner_is? avoids
> having to load the association if not already loaded.
>
> That should work if acting_user is available when it evaluates.
> should return false if owner_is? acting_user and User if not. That's
> a little unintuitive that passing true to available_to doesn't make it
> available.
>
> On Oct 7, 1:48 pm, Denis <[email protected]> wrote:
>> Hi,
>>
>> Your suggestions have guided me to right solution : )
>> Correct way to do that I need is following:
>> :available_to => "User.is_not(#{:owner})"
>>
Couple notes on this - as Kevin pointed out, this loads all the other users.
Also, there's a lot of excess punctuation here, as the double-quoted string is
expanded during class definition - it's equivalent to 'User.is_not(owner)'.
It's actually a pretty tricky problem, since you want to generate a list of
"everybody but that record" without actually loading everybody. But, some
metaprogrammery can save the day:
In the class with the lifecycle, add:
def not_owners
r = Array.new
this = self
r.meta_def :include? do |x|
x.id != this.user_id
end
r
end
Then set :available_to => :not_owners, which will call the method to get an
array of users the transition should be available to, which has been
spring-loaded to return the correct answers... You may also want to add a check
to see if x is a guest as well; the current method will return true for them by
default.
--Matt Jones
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