An n+1 queries problem means that a query is executed for every result of a previous query.
For example, with this records…
class Post < ActiveRecord::Base has_many :comments end class Comment < ActiveRecord::Base belongs_to :post end
If you execute the next code…
Post.all.each do |post| post.comments.each do |comment| puts comment.body end end
You will execute…
nqueries to fetch the
If there are…
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includes, etc...) to work with associations.