How to convert mysql query to laravel query builder? - mysql

Question

I have 2 tables and in first comments and article id, in second article title, id , category of article. I want has a title of article which has the most comments.
SELECT comments.article_id, news.title, news.category_id,
COUNT(comments.id) as counts
FROM comments
JOIN news ON news.id = comments.article_id
GROUP BY(article_id)
ORDER BY counts DESC
LIMIT 3
I tried this:
$articles = DB::table('comments')
->join('news', 'news.id', '=', ' comments.article_id')
->select(comments.article_id', 'news.title', ' news.category_id')
->count('comments.id')
->groupBy('article_id')
->orderBy(DB::raw('count(comments.id)', 'desc')
->limit(3)
->get();
But had:
Call to a member function groupBy() on integer

Answer 1

You are using a "finisher", which means ->count('comments.id') does not return an instance of QueryBuilder anymore but a regular type (integer).
As integers in PHP are not classes, you are trying to perform a method on an non-class, which led to display this error message.
You surely know others finishers like ->sum(), ->all(), ->get(), ...
Just remove your line ->count('comments.id') and you will be good to go:
$articles = DB::table('comments')
->join('news', 'news.id', '=', ' comments.article_id')
->select('comments.article_id', 'news.title', ' news.category_id')
->groupBy('article_id')
->orderBy(DB::raw('count(comments.id)', 'desc')
->limit(3)
->get();

Answer 2

DB::table('comments')
->join('news', 'news.id', '=', ' comments.article_id')
->selectRaw('comments.article_id', 'news.title', ' news.category_id', 'count(comments.id) as countsxyz')
->groupBy('article_id')
->orderBy(DB::raw('countsxyz'), 'desc')
->limit(3)
->get();
try this and let me know if you still face any issue.