Refactor non nullable to required

README.md

@@ -41,7 +41,7 @@ The following steps describe how to create a JSON:API project.
    public class Person : Identifiable<long>
    {
        [Attr] public string? FirstName { get; set; }
-       [Attr] public string LastName { get; set; } = null!;
+       [Attr] public required string LastName { get; set; }
        [HasMany] public ISet<Person> Children { get; set; } = new HashSet<Person>();
    }
    ```

benchmarks/Deserialization/DeserializationBenchmarkBase.cs

@@ -89,7 +89,7 @@ public sealed class IncomingResource : Identifiable<long>
         public float? Attribute05 { get; set; }
 
         [Attr]
-        public string Attribute06 { get; set; } = null!;
+        public required string Attribute06 { get; set; }
 
         [Attr]
         public DateTime? Attribute07 { get; set; }
@@ -104,33 +104,33 @@ public sealed class IncomingResource : Identifiable<long>
         public DayOfWeek Attribute10 { get; set; }
 
         [HasOne]
-        public IncomingResource Single1 { get; set; } = null!;
+        public required IncomingResource Single1 { get; set; }
 
         [HasOne]
-        public IncomingResource Single2 { get; set; } = null!;
+        public required IncomingResource Single2 { get; set; }
 
         [HasOne]
-        public IncomingResource Single3 { get; set; } = null!;
+        public required IncomingResource Single3 { get; set; }
 
         [HasOne]
-        public IncomingResource Single4 { get; set; } = null!;
+        public required IncomingResource Single4 { get; set; }
 
         [HasOne]
-        public IncomingResource Single5 { get; set; } = null!;
+        public required IncomingResource Single5 { get; set; }
 
         [HasMany]
-        public ISet<IncomingResource> Multi1 { get; set; } = null!;
+        public required ISet<IncomingResource> Multi1 { get; set; }
 
         [HasMany]
-        public ISet<IncomingResource> Multi2 { get; set; } = null!;
+        public required ISet<IncomingResource> Multi2 { get; set; }
 
         [HasMany]
-        public ISet<IncomingResource> Multi3 { get; set; } = null!;
+        public required ISet<IncomingResource> Multi3 { get; set; }
 
         [HasMany]
-        public ISet<IncomingResource> Multi4 { get; set; } = null!;
+        public required ISet<IncomingResource> Multi4 { get; set; }
 
         [HasMany]
-        public ISet<IncomingResource> Multi5 { get; set; } = null!;
+        public required ISet<IncomingResource> Multi5 { get; set; }
     }
 }

benchmarks/Serialization/SerializationBenchmarkBase.cs

@@ -73,7 +73,7 @@ public sealed class OutgoingResource : Identifiable<long>
         public float? Attribute05 { get; set; }
 
         [Attr]
-        public string Attribute06 { get; set; } = null!;
+        public required string Attribute06 { get; set; }
 
         [Attr]
         public DateTime? Attribute07 { get; set; }

docs/home/index.html

@@ -189,7 +189,7 @@ <h4 class="title">Resource</h4>
 {
     [Attr]
     [MaxLength(30)]
-    public string Title { get; set; } = null!;
+    public required string Title { get; set; }
 
     [Attr(Capabilities = AttrCapabilities.AllowFilter)]
     public string? Summary { get; set; }
@@ -205,7 +205,7 @@ <h4 class="title">Resource</h4>
     public DateTimeOffset LastModifiedAt { get; set; }
 
     [HasOne]
-    public Person Author { get; set; } = null!;
+    public required required Person Author { get; set; }
 
     [HasOne]
     public Person? Reviewer { get; set; }

docs/usage/common-pitfalls.md

@@ -17,7 +17,7 @@ Now let's try to define the resource classes:
 public sealed class WebCustomer : Identifiable<long>
 {
     [Attr]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [HasOne]
     public LoginAccount? Account { get; set; }
@@ -27,7 +27,7 @@ public sealed class WebCustomer : Identifiable<long>
 public sealed class AdminCustomer : Identifiable<long>
 {
     [Attr]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [Attr]
     public string? CreditRating { get; set; }
@@ -40,7 +40,7 @@ public sealed class AdminCustomer : Identifiable<long>
 public sealed class LoginAccount : Identifiable<long>
 {
     [Attr]
-    public string EmailAddress { get; set; } = null!;
+    public required string EmailAddress { get; set; }
 
     [HasOne]
     public ??? Customer { get; set; }

docs/usage/options.md

@@ -141,13 +141,13 @@ public class Person : Identifiable<long>
 {
     [Attr]
     [MinLength(3)]
-    public string FirstName { get; set; } = null!;
+    public required string FirstName { get; set; }
 
     [Attr]
     [Required]
     public int? Age { get; set; }
 
     [HasOne]
-    public LoginAccount Account { get; set; } = null!;
+    public required LoginAccount Account { get; set; }
 }
 ```

docs/usage/resources/attributes.md

@@ -11,7 +11,7 @@ public class Person : Identifiable<long>
     public string? FirstName { get; set; }
 
     [Attr]
-    public string LastName { get; set; } = null!;
+    public required string LastName { get; set; }
 }
 ```
 
@@ -54,7 +54,7 @@ Otherwise, the attribute is silently omitted.
 public class User : Identifiable<long>
 {
     [Attr(Capabilities = ~AttrCapabilities.AllowView)]
-    public string Password { get; set; } = null!;
+    public required string Password { get; set; }
 }
 ```
 

docs/usage/resources/inheritance.md

@@ -10,7 +10,7 @@ Resource classes can be part of a type hierarchy. For example:
 public abstract class Human : Identifiable<long>
 {
     [Attr]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [HasOne]
     public Man? Father { get; set; }

docs/usage/resources/nullability.md

@@ -72,13 +72,13 @@ Example:
 public sealed class Label : Identifiable<long>
 {
     [Attr]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [Attr]
     public string? RgbColor { get; set; }
 
     [HasOne]
-    public Person Creator { get; set; } = null!;
+    public required Person Creator { get; set; }
 
     [HasOne]
     public Label? Parent { get; set; }

docs/usage/resources/relationships.md

@@ -39,7 +39,7 @@ The next example defines that each car requires an engine, while an engine is op
 public sealed class Car : Identifiable<long>
 {
     [HasOne]
-    public Engine Engine { get; set; } = null!;
+    public required Engine Engine { get; set; }
 }
 
 public sealed class Engine : Identifiable<long>
@@ -264,7 +264,7 @@ There are two ways the exposed relationship name is determined:
 public class TodoItem : Identifiable<long>
 {
     [HasOne(PublicName = "item-owner")]
-    public Person Owner { get; set; } = null!;
+    public required Person Owner { get; set; }
 }
 ```
 
@@ -297,7 +297,7 @@ Otherwise, the relationship (and its related resources, when included) are silen
 public class User : Identifiable<long>
 {
     [HasOne(Capabilities = ~HasOneCapabilities.AllowView)]
-    public LoginAccount Account { get; set; } = null!;
+    public required LoginAccount Account { get; set; }
 }
 ```
 
@@ -339,7 +339,7 @@ Indicates whether POST and PATCH requests can replace the relationship. When sen
 public class User : Identifiable<long>
 {
     [HasOne(Capabilities = ~HasOneCapabilities.AllowSet)]
-    public LoginAccount Account { get; set; } = null!;
+    public required LoginAccount Account { get; set; }
 }
 ```
 
@@ -400,7 +400,7 @@ So for the calculated property to be evaluated correctly, the related entity mus
 public class ShippingAddress : Identifiable<long>
 {
     [Attr]
-    public string Street { get; set; } = null!;
+    public required string Street { get; set; }
 
     [Attr]
     public string? CountryName => Country?.DisplayName;
@@ -412,7 +412,7 @@ public class ShippingAddress : Identifiable<long>
 
 public class Country
 {
-    public string IsoCode { get; set; } = null!;
-    public string DisplayName { get; set; } = null!;
+    public required string IsoCode { get; set; }
+    public required string DisplayName { get; set; }
 }
 ```

src/Examples/DapperExample/Models/LoginAccount.cs

@@ -9,7 +9,7 @@ namespace DapperExample.Models;
 public sealed class LoginAccount : Identifiable<long>
 {
     [Attr]
-    public string UserName { get; set; } = null!;
+    public required string UserName { get; set; }
 
     public DateTimeOffset? LastUsedAt { get; set; }
 

src/Examples/DapperExample/Models/Person.cs

@@ -13,7 +13,7 @@ public sealed class Person : Identifiable<long>
     public string? FirstName { get; set; }
 
     [Attr]
-    public string LastName { get; set; } = null!;
+    public required string LastName { get; set; }
 
     // Mistakenly includes AllowFilter, so we can test for the error produced.
     [Attr(Capabilities = AttrCapabilities.AllowView | AttrCapabilities.AllowFilter)]

src/Examples/DapperExample/Models/Tag.cs

@@ -11,7 +11,7 @@ public sealed class Tag : Identifiable<long>
 {
     [Attr]
     [MinLength(1)]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [HasOne]
     public RgbColor? Color { get; set; }

src/Examples/DapperExample/Models/TodoItem.cs

@@ -10,7 +10,7 @@ namespace DapperExample.Models;
 public sealed class TodoItem : Identifiable<long>
 {
     [Attr]
-    public string Description { get; set; } = null!;
+    public required string Description { get; set; }
 
     [Attr]
     [Required]
@@ -26,7 +26,7 @@ public sealed class TodoItem : Identifiable<long>
     public DateTimeOffset? LastModifiedAt { get; set; }
 
     [HasOne]
-    public Person Owner { get; set; } = null!;
+    public required Person Owner { get; set; }
 
     [HasOne]
     public Person? Assignee { get; set; }

src/Examples/DatabasePerTenantExample/Models/Employee.cs

@@ -9,11 +9,11 @@ namespace DatabasePerTenantExample.Models;
 public sealed class Employee : Identifiable<Guid>
 {
     [Attr]
-    public string FirstName { get; set; } = null!;
+    public required string FirstName { get; set; }
 
     [Attr]
-    public string LastName { get; set; } = null!;
+    public required string LastName { get; set; }
 
     [Attr]
-    public string CompanyName { get; set; } = null!;
+    public required string CompanyName { get; set; }
 }

src/Examples/GettingStarted/Models/Book.cs

@@ -9,11 +9,11 @@ namespace GettingStarted.Models;
 public sealed class Book : Identifiable<long>
 {
     [Attr]
-    public string Title { get; set; } = null!;
+    public required string Title { get; set; }
 
     [Attr]
     public int PublishYear { get; set; }
 
     [HasOne]
-    public Person Author { get; set; } = null!;
+    public required Person Author { get; set; }
 }

src/Examples/GettingStarted/Models/Person.cs

@@ -9,7 +9,7 @@ namespace GettingStarted.Models;
 public sealed class Person : Identifiable<long>
 {
     [Attr]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [HasMany]
     public ICollection<Book> Books { get; set; } = new List<Book>();

src/Examples/JsonApiDotNetCoreExample/Models/Person.cs

@@ -13,7 +13,7 @@ public sealed class Person : Identifiable<long>
     public string? FirstName { get; set; }
 
     [Attr]
-    public string LastName { get; set; } = null!;
+    public required string LastName { get; set; }
 
     [Attr(Capabilities = AttrCapabilities.AllowView)]
     [NotMapped]

src/Examples/JsonApiDotNetCoreExample/Models/Tag.cs

@@ -11,7 +11,7 @@ public sealed class Tag : Identifiable<long>
 {
     [Attr]
     [MinLength(1)]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [HasMany]
     public ISet<TodoItem> TodoItems { get; set; } = new HashSet<TodoItem>();

src/Examples/JsonApiDotNetCoreExample/Models/TodoItem.cs

@@ -10,7 +10,7 @@ namespace JsonApiDotNetCoreExample.Models;
 public sealed class TodoItem : Identifiable<long>
 {
     [Attr]
-    public string Description { get; set; } = null!;
+    public required string Description { get; set; }
 
     [Attr]
     [Required]
@@ -26,7 +26,7 @@ public sealed class TodoItem : Identifiable<long>
     public DateTimeOffset? LastModifiedAt { get; set; }
 
     [HasOne]
-    public Person Owner { get; set; } = null!;
+    public required Person Owner { get; set; }
 
     [HasOne]
     public Person? Assignee { get; set; }

src/Examples/NoEntityFrameworkExample/Models/Person.cs

@@ -14,7 +14,7 @@ public sealed class Person : Identifiable<long>
     public string? FirstName { get; set; }
 
     [Attr]
-    public string LastName { get; set; } = null!;
+    public required string LastName { get; set; }
 
     [Attr(Capabilities = AttrCapabilities.AllowView)]
     [NotMapped]

src/Examples/NoEntityFrameworkExample/Models/Tag.cs

@@ -12,7 +12,7 @@ public sealed class Tag : Identifiable<long>
 {
     [Attr]
     [MinLength(1)]
-    public string Name { get; set; } = null!;
+    public required string Name { get; set; }
 
     [HasMany]
     public ISet<TodoItem> TodoItems { get; set; } = new HashSet<TodoItem>();

src/Examples/NoEntityFrameworkExample/Models/TodoItem.cs

@@ -11,7 +11,7 @@ namespace NoEntityFrameworkExample.Models;
 public sealed class TodoItem : Identifiable<long>
 {
     [Attr]
-    public string Description { get; set; } = null!;
+    public required string Description { get; set; }
 
     [Attr]
     [Required]
@@ -21,7 +21,7 @@ public sealed class TodoItem : Identifiable<long>
     public long? DurationInHours { get; set; }
 
     [HasOne]
-    public Person Owner { get; set; } = null!;
+    public required Person Owner { get; set; }
 
     [HasOne]
     public Person? Assignee { get; set; }

src/Examples/ReportsExample/Models/Report.cs

@@ -10,8 +10,8 @@ namespace ReportsExample.Models;
 public sealed class Report : Identifiable<long>
 {
     [Attr]
-    public string Title { get; set; } = null!;
+    public required string Title { get; set; }
 
     [Attr]
-    public ReportStatistics Statistics { get; set; } = null!;
+    public required ReportStatistics Statistics { get; set; }
 }