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Editorial Team
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Asked: 2026-05-24T08:54:25+00:00

I realize that this could be a rare occurrence (that two or more users

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I realize that this could be a rare occurrence (that two or more users would have the same blog post title) but this is something my client wants so, I have to figure it out.

I have a query @blog_posts (which is a query on Posts that changes based on location, etc). I need a way to to list out all the posts titles and how many times that title occurs within the query @blog_posts

Like this:

How to clean a car (2)
I love baseball (1)

Is there a standard practice for grouping and sorting?

In summary, I need to count the occurrences in the query @blog_posts = Post.where(...) (for example) — not all posts in existence.

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1 Answer

  1. Editorial Team

    Sounds like you basically want to count occurrences: this answer could be adapted to your purposes.

    If you’re on 1.8.7 or newer, consider group_by:

    ruby-1.9.2-p180 :002 > posts = ["How to clean a car", "How to clean a car", "I love baseball"]
 => ["How to clean a car", "How to clean a car", "I love baseball"]
ruby-1.9.2-p180 :007 > posts.group_by {|e| e}.map {|k, v| {k => v.length}}
 => [{"How to clean a car"=>2}, {"I love baseball"=>1}]
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