.net core : incomplete JSON response

Question

I\'m trying to build simple API for training, in my database I got users (firstname, lastname, email password, list) and sports ( name, userID). A

Answer 1

The selected answer was correct in my case as well, my JSON response was getting truncated by a reference loop in my JSON response, and setting ReferenceLoopHandling.Ignore did indeed solve my issue. However, this is not the best solution in my opinion, as this maintains the circular references in your model. A better solution would use the [JsonIgnore] attribute within the model.

The issue in your model is here:

public class Sport : BaseEntity
{
    public string Name { get; set; }

    public int UserId { get; set; }
    public User User { get; set; }  //This is the cause of your circular reference
}

public class User : BaseEntity
{
    public String FirstName { get; set; }
    public String LastName { get; set; }
    public String Email { get; set; }
    public String Password { get; set; }

    public List Sports { get; set; }
}

As you can see, your User navigation property is where this response is truncated. Specifically, it will cause each Sport in the json response to contain all of the user information for each sport entry in the response. Newtonsoft does not like this. The solution is to simply [JsonIngore] the navigation properties that cause this circular reference. In your code this would be:

public class Sport : BaseEntity
{
    public string Name { get; set; }

    public int UserId { get; set; }
    [JsonIgnore]
    public User User { get; set; }  //fixed
}

public class User : BaseEntity
{
    public String FirstName { get; set; }
    public String LastName { get; set; }
    public String Email { get; set; }
    public String Password { get; set; }

    public List Sports { get; set; }
}