ASP.NET Core 6: guide with Model Binding for Nested Collections in API Endpoint
I'm upgrading from an older version and I'm refactoring my project and Could someone explain Quick question that's been bugging me - This might be a silly question, but I'm working with an scenario with model binding when trying to post a JSON object that contains a nested collection in my ASP.NET Core 6 API......... My model looks like this: ```csharp public class Order { public int Id { get; set; } public string CustomerName { get; set; } public List<Product> Products { get; set; } } public class Product { public int ProductId { get; set; } public string ProductName { get; set; } public decimal Price { get; set; } } ``` And I have the following action method in my controller: ```csharp [HttpPost] public IActionResult CreateOrder([FromBody] Order order) { if (!ModelState.IsValid) { return BadRequest(ModelState); } // Process order... return Ok(); } ``` When I send a POST request with the following JSON payload: ```json { "Id": 1, "CustomerName": "John Doe", "Products": [ { "ProductId": 101, "ProductName": "Widget", "Price": 19.99 }, { "ProductId": 102, "ProductName": "Gadget", "Price": 29.99 } ] } ``` I'm getting a `400 Bad Request` response, and the `ModelState` behavior details indicate that the `Products` property want to be bound properly. The behavior message reads: "The JSON value could not be converted to System.Collections.Generic.List`1[Product]." I've double-checked my JSON structure and it seems to match my model. I've tried a few things: - Ensured the JSON payload is formatted correctly. - Verified that the `Products` property is nullable and initialized. - Tried using `[FromForm]` instead of `[FromBody]`, but that did not help. Is there something I'm missing or is there a known scenario with model binding for nested collections in ASP.NET Core 6? Any advice or insights would be greatly appreciated! For context: I'm using C# on Windows. What's the best practice here? I'm working on a application that needs to handle this. I'd really appreciate any guidance on this. This is part of a larger service I'm building. My development environment is CentOS. Any examples would be super helpful. This is for a desktop app running on Debian.