Quick ORM question


#1

Quick question on this query:

@item.entries = Entry.find_recent(@td.id, 10) || []

My development log file shows that rails makes 2 calls to database! Is
rails ORM not smart enough to know to not load the lvalue of assignment
thus
causing another expensive db call? Below are the stubbed models and a
log
snip.

class Entry < ActiveRecord::Base
belongs_to :tracking_definition
def self.find_recent(td_id, limit=10)
find(:all, :conditions => [“tracking_definition_id = ?”, td_id],
:limit
=> limit)
end
end

class Item < ActiveRecord::Base
has_many :entries
end

------------------- log snip from this one line

e[4;36;1mItem Load (0.000000)e[0m e[0;1mSELECT * FROM items WHERE
(item_id = 1) LIMIT 10e[0m
e[4;35;1mEntry Load (0.000000)e[0m e[0mSELECT * FROM items WHERE
(entries.item_id = 1) e[0m