如何确定我的数据库中存在/填充了哪些属性 - 并创建排名 - c#

Question

I'm receiving products from a server and the response looks like this:

{
    "products": [
        {
            "id":"1",
            "city": "New York",
            "title": "Pepsi",
            "brand": "Coca-Cola"
        },
        {
            "id":"2",
            "city": "Seatle",
            "title": "Fanta",
            "brand": "Idk"
        },
        {   
            "id":"3",
            "city": "D.C W.",
            "title": "Snickers",
            "brand": "Fat"
        }
    ]
}

I've previously also inserted some products in my Db... and I need to compare which properties already exist in my database.

The more properties are the persisted the higher the rank is.

This "Rank" basically determines how well the data is synchronized.

For example if two properties from a request exist in my database, that is rank 2, if all of them exist in my database that is rank 3 for instance.

Here's what I tried:

    private IQueryable<ProductDto> OrderingProducts(IQueryable<Product> databaseProducts, RequestDto request)
    {
        foreach(var item in request.Products)
        { // Probably makes no sense.. :(
          ord.AddRange(products.Where(c.Title == user.title && c.Brand == item.brand));
          ord.AddRange(products.Where(c => c.City == item.city));
          ord.AddRange(products.Where(c => c.Title == item.title ));
          ord.AddRange(products.Where(c => c.Brand == item.brand));
        }

    }

Idea was to receive both lists, and to somehow compare which properties data exist in my database.

I'm stuck on this, any kind of help would be awesome!

Answer 1

Something like this will get the ranking for you, but I don't know what type request.Products is, or what you want to do with it afterwards.

foreach (var item in request.Products)
{
    var match = databaseProducts.SingleOrDefault(dp => dp.Id = item.Id);
    int rank = match == null ? -1 : GetRank(item, match);
    // TODO do something with rank
}

int GetRank(RequestTypeUnknown item, Product match)
{   
    return (item.city == match.City ? 1 : 0) +
           (item.title == match.Title ? 1 : 0) +
           (item.brand == match.Brand ? 1 : 0);
}

Answer 2

The response is in json format so you could deserialize it

public class Response
{
    public List<Product> Products { get; set; }
}

public class Product
{
    public string Id { get; set; }
    public string City { get; set; }
    public string Title { get; set; }
    public string Brand { get; set; }
}

Usage

Response res = JsonConvert.DeserializeObject<Response>(json);

foreach(var product in res.Products)
{
    //product.Id
}