How to optimise the code

[Hem Chan]

How would I optimize the following code?

def posts_for_30_blogs
blogs = Blog.limit(30)
blogs.flat_map do |blog|
blog.posts.to_a
end
end

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Posted via http://www.ruby-forum.com/.

[Greg Navis]

Optimise in what sense? If this is about solving the N + 1 query problem then try:

blogs = Blog.include(:posts).limit(30)

This should load associated posts with only 1 query.

--

Greg Navis

I help tech companies to scale Heroku-hosted Rails apps.

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[Hem Chan]

Thanks very much..