如何在实体框架核心中使用私有属性更新 Model？

Question

I have a model that has a private setter on the Id property:

public class Guest
{
    public Guid GuestId { get; private set; } = Guid.NewGuid();
}

The Controller functionality is:

public ActionResult UpdateGuest([FromBody] Guest guest)
{
    _db.Guests.Update(guest);
    _db.SaveChangesAsync();

    return Ok();
}

When I call the controller however it creates a new instance of the class with a new GuestId Guid and therefore can't update the property.

If I remove the private setter then the update functionality works fine, but I feel like updating a model idea isn't really best practice.

One solution may be to take a generic json object in the form body and then update each individual property, but I reckon that it isn't really extensible as every model update would mean an update to the controllers.

What's the best way around this? Thank you!!!

Answer 1

For FromBody , it uses Newtonsoft.Json to deserialize the json to Object.

To make Newtonsoft.Json to deserialize the private properties, you could try below；

public class Guest
{
    [JsonProperty]
    public Guid GuestId { get; private set; } = Guid.NewGuid();
}