List animals with average capture_percent (Josh Susser's example)

Hi guys,

I implemented self-referential system based on Josh S.'s guidance
on http://blog.hasmanythrough.com/2007/10/ … ny-through

now I’m unsuccesfully trying to list all animals together with average
hunt.capture_percent, regardless of whether it is ‘pursuit’ or
‘escape’ (i am using it on sthg else than animals where it makes sense
not to differentiate between these. i want to keep having separated
‘pursuit’ and ‘escape’ for future though)

i tried sthg like

<%= (animal.pursuit.average(:capture_percent)
+animal.pursuit.average(:capture_percent))/2 %>

first, this doesn’t work, while having just <%=
(animal.pursuit.average(:capture_percent) %> does

second, i believe this calculation should rather be included in
controller, but i have no idea how to do it over an array, join this
array with the array of @animals and send this all to view :frowning:

this might be rather stupid newbie question, but I failed to google
out an answer :frowning: thanks for any help

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