Select one image from product (SQL query builder Yii2) - php

Question

the question is about SQL and Yii2 in particular.
There are three tables:
Product {id, title}
Image {id, url}
Product_Image {product_id, image_id, main}
I'm trying to use the query builder to form a query in such a way that the result is a table like this:
Result {product_id, title, main_image}
Columns product_id, title - from the Product table
Column main_image - should contain an entry from image.url where column main = 1, otherwise return the first found image or NULL
Product::find()
->select([
'product.id AS product_id',
'product.title AS title',
'image.image_url AS main_image',
])
->leftJoin('product_image', 'product_image.product_id = product.id')
->leftJoin('image', 'image.id = product_image.image_id')
->asArray()
->all();
This query returns a lot of the same product_id if the product has multiple images. I need to have only 1 entry for each product and there was either a link to the main image, or if there is no main, then the first entry that came across, or NULL
The ideal look is:
[
0 => [
'product_id' => '1'
'title' => 'Product 1'
'main_image' => null
]
1=>[
'product_id' => '2'
'title' => 'Product 2'
'main_image' => '/images/products/2.jpg'
]
2=>[
'product_id' => '3'
'title' => 'Product 3'
'main_image' => '/images/products/3.jpg'
]
]
I tried adding
andWhere(['product_image.main' => 1])
but in that case all products that don't have a 'main' image disappear.
Please help me, what do I need to add to the SQL request (MySQL)?
UPD:
->joinWith('productImages')
->joinWith('productImages.image');
This approach searches for all existing images and puts them in the "productImages" array. I don't have to search all the images for every product.