Please don’t give me recepies like: :include => [:questions] or
something like: @categories.each { |c| c.questions.count } Because
those methods is not so much optimized, to run them on a production
server.
My company uses “recepies” like that on production servers. Could you
be more specific? Which methods are you against using and why? Would
you prefer writing your own SQL queries? Have you looked at the
find_by_sql and count_by_sql methods?
Please don’t give me recepies like: :include => [:questions] or
something like: @categories.each { |c| c.questions.count } Because
those methods is not so much optimized, to run them on a production
server.
@category.questions.size
From the API docs:
Returns the size of the collection by executing a SELECT COUNT(*) query
if the collection hasn’t been loaded and calling collection.size if it
has. If it’s more likely than not that the collection does have a size
larger than zero and you need to fetch that collection afterwards, it’ll
take one less SELECT query if you use length.