Data is Null. This method or property cannot be called on Null values

Question

I\'m working on an application where one can get information on movies from a database as well as add, update and delete the movies. In the database I have three tables (Movie,

Answer 1

This error happens immediately after I enabled C# 8 nullable feature in my Entity Framework Core 3.1 project.

The solution is to change your entity properties to their nullable counterparts. For example,

Change from:

public class Person {
  public int Id { get; set; }
  public string Name { get;set; }
  public string Address { get;set; }
}

To:

public class Person {
  public int Id { get; set; }
  public string Name { get;set; }
  public string? Address { get;set; }  //change address to nullable string since it is nullable in database
}