David,
thank you so much, that was the correct answer.
My complete association extension is now:
class Dropzone < ActiveRecord::Base
has_many :transactions, :through => :accounts do
def limited_to(transaction)
scope = Transaction.scoped({ :conditions =>
['accounts.dropzone_id = ?', proxy_owner.id],
:include =>
[:account, :payment_method, :slot] })
scope = scope.scoped :conditions => ['name ILIKE ?', "%#
{transaction.account_name}%"] unless transaction.account_name.blank?
scope = scope.scoped :conditions => ['payment_method_id = ?',
transaction.payment_method_id] unless
transaction.payment_method_id.blank?
scope
end
end
end
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