• Publishers produce books that are sold in shops.
• A book can be distributed via multiple shops.
• A shop can sell multiple copies of a book. .

Please model the required database relations and create API Endpoints described below. The code should be covered with tests (rspec).

for a specific Publisher it should return the list of shops selling at least one book of that publisher. Shops should be ordered by the number of books sold. Each shop should include the list of Publisher’s books that are currently in stock.

Example response:

{
  shops:[
   {
     “id”: 1,
     “name”: “Amazon”,
     “books_sold_count”: 10,
     “books_in_stock”: [
       {
         “id”: 2,
         “title”: “Yiddish songs”,
         “copies_in_stock”: 3
       },
       …
     ]
   },
   …
 ]
}

For a specific Shop it should mark one or multiple copies of a book as sold.

Please upload your code to github repository, there is no need in ZIP archives or smth, please send us link to you solution pubslihed on https://github.com .

If you have any questions - please dont hesitate to ask contact who shared this test with you.