how to to bind complex model in ASP.NET Core 6 with custom validation attributes
I'm optimizing some code but I tried several approaches but none seem to work... I'm working with an scenario in my ASP.NET Core 6 application where a complex model is not binding correctly when submitted through a form. I have a model that contains a nested class with custom validation attributes, and I keep getting a validation behavior even though the input values seem correct. Here's the model I’m using: ```csharp public class UserRegistrationModel { [Required] public string UserName { get; set; } [Required] [EmailAddress] public string Email { get; set; } [Required] public PasswordModel Password { get; set; } } public class PasswordModel { [Required] [MinLength(8)] public string Password { get; set; } [Required] [Compare("Password")] public string ConfirmPassword { get; set; } } ``` In my view, I have a form like this: ```html <form asp-action="Register" method="post"> <input asp-for="UserName" /> <input asp-for="Email" /> <input asp-for="Password.Password" /> <input asp-for="Password.ConfirmPassword" /> <button type="submit">Register</button> </form> ``` On the controller side, I’m trying to bind the model: ```csharp [HttpPost] public IActionResult Register(UserRegistrationModel model) { if (ModelState.IsValid) { // Save user return RedirectToAction("Success"); } return View(model); } ``` However, when I submit the form, the `ModelState.IsValid` check always fails, and I see an behavior saying that `Password` is required in the `UserRegistrationModel`. I’ve confirmed that all inputs are being sent correctly by checking the browser's developer tools. I've also tried using `[Bind]` attributes explicitly but that didn’t solve the question either. I suspect it might be related to the way the nested model is being bound. Is there something specific I need to consider with validation attributes on a nested class in ASP.NET Core 6? Would really appreciate any guidance or insights on this scenario. I'm working on a API that needs to handle this. I recently upgraded to Csharp 3.10. I appreciate any insights!