Rails where condition with nil value

Question

I found out that using where with symbol :my_id => nil and using old school one with ? is different. Could anyone explain me why?

MyTable.where(\"my_id = ? \", n         


        

Answer 1

I suppose it's so called "rails magic" you can pass ranges

Client.where(:created_at => (Time.now.midnight - 1.day)..Time.now.midnight)

becomes

SELECT * FROM clients WHERE (clients.created_at BETWEEN '2008-12-21 00:00:00' 
                                                    AND '2008-12-22 00:00:00')

or if you pass a subset

Client.where(:orders_count => [1,3,5])

rails will do

SELECT * FROM clients WHERE (clients.orders_count IN (1,3,5))

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