2 ms·
"But there is no easy way to do this in ActiveRecord without sacrificing eager loading." Define a relationship: has_many :approved_comments, class_name: "Comm
by yarb 11y ago
"But there is no easy way to do this in ActiveRecord without sacrificing eager loading."
Define a relationship:
has_many :approved_comments, class_name: "Comments", condtions: {approved: true}
Then eager load approved_comments.
- kenn 11y agoThat works, but what if there are thousands of comments? Initializing N*M AR objects could be even slower than N+1 queries. I wish if we could do something like: has_one :approved_comments_count, -> { select(:post_id, 'COUNT(comments.post_id) as comment_count').group(:post_id) }, class_name: 'Comment' and posts.includes(:approved_comments_count).map(&:comment_count)