Rails - how to convert output of find_by_sql (array) to an ActiveRecord relation?

I am in a need of running a complex SQL query and because I didn't know how to construct the query using ActiveRecod, I had to use a raw SQL query by using find_by_sql:

scope :get_cars, -> do
find_by_sql('select * from
(SELECT cars.*,
manufacturer.company_name AS manufacturer_company_name,
services.a_num AS service_a_num,
(SELECT car_documents.file_url FROM car_documents
WHERE car_documents.car_id = cars.id AND car_documents.doc_type = 1 LIMIT 1) AS doc1_file_url,
(SELECT car_documents.file_s3_url FROM car_documents
WHERE car_documents.cart_id = cars.id AND car_documents.doc_type = 3 LIMIT 1) AS file_inv,
(SELECT car_data.demand_lvl FROM car_data
WHERE car_data.car_id = cars.id) AS demand_lvl,
(SELECT car_logs.invoice FROM car_logs
WHERE car_logs.car_id = cars.id AND car_logs.invoice = 1 LIMIT 1) AS invoice_sent
FROM "cars"
INNER JOIN "services" ON "services"."id" = "cars"."service_id"
LEFT JOIN manufacturers ON manufacturers.id = cars.manufacturer_id
WHERE (cars.status_id != 6
AND cars.delivery_date < NOW() - INTERVAL \'15 days\'
) ORDER BY cars.pickup_date ASC) t
Where doc1_file_url IS NULL OR file_inv IS NULL OR invoice_sent IS NULL')
end


The output is an array. How do I convert this array into an ActiveRecord object? Or possibly, is there any workaround?

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