API-lists.txt

1.ProdutController-Done.
2.Get Produts-Done.
3.Add a product-Done.
4.Get one product-Done.
5.Filter product - Done.
6.Rate Produt-  Done.
7.Add item in cart - Done
8.Get item in cart - Done
9.Remove item from cart.Done

UserConteroller
SignUp -  Email, Name, Password, Type Of User ( Customer, Seller ).- Done 
SignIn - Email and Password - Done

Auth 

basicAuth - Done
JWT Auth - Done 

iD // ---> changing ro givibnd id to users and products in mongoDb - Done

1. Counter Collection (id:"cartItemId", value:0)
2. while adding cart items , increment the counter and use counter value as id to cartItem document.



{_id: cat1,
avgPrice: 50000}

2. Find the avg rating of the product.
  -> pipeline 

    db.products.aggregate([
      //  1. Create a documents for ratings 
        {
            $unwind:"$ratings"
        },
       // 2. Group rating and get the AvgRating
        {
            $group:{
                _id:"$name",
                averageRating: {$avg:"$ratings.rating"}
            }
        }      
    ])


    /// learn new rhing in mongoDb

    db.products.aggregate([

        //1.PRoejct name of Produt and the countOfRating
        {
            $project:{name:1, countOfRating:{
                $cond: {if:{$isArray: "$ratings"},
                then:{ $size:"$ratings"}, else:0}    
                }
        //2. Sorting the items products
        
            }
        },
        {
            $sort : {"countOfRating":-1}
        },
        {
            //3. Limit to just 1 item in result.
            
                $limit:1
            
        }
    ])