Laravel count categories join - mysql

Question

I have three tables that I need to ultimately query from, and I am looking for the most efficient way of going about it.
The tables are: products, product_colors, and categories.
The relationships are products.category_id => categories.id and product_colors.product_id => products.id (filtered by product_colors.color_id)
First I have a product table, and that product has a one to many relationship with a color table, so I need to filter that based on the color.
Second, I need to filter it by the category, and return the amount of products in each category it fits.
I have the following query which will ultimately count the products in each of the categories that I want, but it doesn't filter based on the first filter of colors.
SELECT categories.name, SUM(IF(category_id IS NULL, 0, 1)) AS categories
FROM products JOIN categories ON (categories.id = products.category_id)
WHERE(products.gender = 1) GROUP BY categories.id;
I'm not too familiar with what is efficient or not in terms of queries or joins, but what I was thinking of maybe getting a list of product IDs which match the color being filtered, and then somehow doing a join on just those IDs.
Edit: in my answer below, I've come up with a solution, but it is using DB:raw -- is there any way around that?

Answer 1

I've managed to come up with the following query that will effectively return what I need, with the option of sorting by gender as well.
mysql> SELECT categories.name, SUM(IF(category_id IS NULL, 0, 1)) AS
categories FROM products LEFT JOIN product_colors ON
(product_colors.product_id = products.id) LEFT OUTER JOIN categories
ON (categories.id = products.category_id) WHERE(products.gender = 1 AND
product_colors.color_id = 1) GROUP BY categories.id;
+--------------+------------+
| name | categories |
+--------------+------------+
| トップス | 35 |
| アウター | 1 |
| ボトムス | 7 |
| シューズ | 21 |
| 帽子 | 2 |
+--------------+------------+
5 rows in set (0.00 sec)
Edit: I've rewritten in it Eloquent.
$categories = Category::select('categories.name',DB::raw('SUM(IF(category_id IS NULL, 0, 1)) AS categories'))
->join('products','categories.id','=','products.category_id')
->join('product_colors','product_colors.product_id','=','products.id','left outer')
->where('products.gender','=',1)
->where('product_colors.color_id','=',1)
->groupBy('categories.id')
->get();
The solution over all I feel isn't too bad, but I don't like the fact it is using DB:raw. If anyone has an alternative to that, I would appreciate it.