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Implement hotness algorithm

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riggraz
2019-09-27 15:48:21 +02:00
parent ccb63c4e16
commit 5ee6a4afae
1 changed files with 12 additions and 2 deletions
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14
app/controllers/posts_controller.rb
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@@ -3,13 +3,23 @@ class PostsController < ApplicationController
def index def index
posts = Post posts = Post
.select('posts.id, title, description, post_status_id, COUNT(comments.id) as comments_count') .select(
:id,
:title,
:description,
:post_status_id,
'COUNT(DISTINCT likes.id) AS likes_count',
'COUNT(DISTINCT comments.id) AS comments_count',
'((LOG(COUNT(DISTINCT likes.id) + 1) + LOG(COUNT(DISTINCT comments.id) + 1)) + (EXTRACT(EPOCH FROM posts.created_at) / 45000)) AS hotness',
"(SELECT COUNT(*) AS liked FROM likes WHERE likes.user_id=#{current_user ? current_user.id : -1} AND likes.post_id=posts.id)"
)
.left_outer_joins(:likes)
.left_outer_joins(:comments) .left_outer_joins(:comments)
.group('posts.id') .group('posts.id')
.where(filter_params) .where(filter_params)
.search_by_name_or_description(params[:search]) .search_by_name_or_description(params[:search])
.order('hotness DESC')
.page(params[:page]) .page(params[:page])
.order(updated_at: :desc)
render json: posts render json: posts
end end