Rick Denatale wrote:
> Why not
>
> pages = Page.all(:include => :book)
I usually need to filter by, let's say, a certain library:
@pages = Page.all(
:select => 'pages.id, pages.no',
:joins => :book,
:conditions => "books.library_id = #{1}"
)
AR will generate:
SELECT pages.id, pages.no FROM "pages" INNER JOIN "books" ON "books".id
= "pages".book_id WHERE (books.library_id = 1)
So the join has already been done. Wouldn't :include make a redundant
query?
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