dasherize names over camel case

JsonApiDotNetCore/Abstractions/JsonApiContext.cs

@@ -30,7 +30,7 @@ public Type GetJsonApiResourceType()
     public string GetEntityName()
     {
       return (!(Route is RelationalRoute) ? Route.BaseRouteDefinition.ContextPropertyName
-      : Configuration.Routes.Single(r => r.ModelType == ((RelationalRoute)Route).RelationalType).ContextPropertyName).ToCamelCase();
+      : Configuration.Routes.Single(r => r.ModelType == ((RelationalRoute)Route).RelationalType).ContextPropertyName).Dasherize();
     }
 
     public Type GetEntityType()

JsonApiDotNetCore/Abstractions/ModelAccessor.cs

@@ -14,7 +14,7 @@ public static Type GetTypeFromModelRelationshipName(Type modelType, string relat
     {
       var properties = modelType.GetProperties().Where(propertyInfo => propertyInfo.GetMethod.IsVirtual).ToList();
       var relationshipType = properties.FirstOrDefault(
-        virtualProperty => virtualProperty.Name.ToCamelCase() == relationshipName.ToCamelCase())?.PropertyType;
+        virtualProperty => virtualProperty.Name.Dasherize() == relationshipName.Dasherize())?.PropertyType;
       if(relationshipType.GetTypeInfo().IsGenericType)
       {
         return relationshipType.GetGenericArguments().Single();

JsonApiDotNetCore/Data/ResourceRepository.cs

@@ -41,7 +41,7 @@ public object Get(string id)
     private object GetRelated(string id, RelationalRoute relationalRoute)
     {
       var entity = GetEntityById(relationalRoute.BaseModelType, id, relationalRoute.RelationshipName);
-      return relationalRoute.BaseModelType.GetProperties().FirstOrDefault(pi => pi.Name.ToCamelCase() == relationalRoute.RelationshipName.ToCamelCase())?.GetValue(entity);
+      return relationalRoute.BaseModelType.GetProperties().FirstOrDefault(pi => pi.Name.Dasherize() == relationalRoute.RelationshipName.Dasherize())?.GetValue(entity);
     }
 
     private IQueryable GetDbSet(Type modelType, string includedRelationship)

JsonApiDotNetCore/Extensions/StringExtensions.cs

@@ -1,26 +1,49 @@
 using System;
+using System.Text;
 
 namespace JsonApiDotNetCore.Extensions
 {
   public static class StringExtensions
   {
     public static string ToCamelCase(this string str)
     {
-      var splittedPhraseChars = str.ToCharArray();
-      if (splittedPhraseChars.Length > 0)
+      var chars = str.ToCharArray();
+      if (chars.Length > 0)
       {
-        splittedPhraseChars[0] = new string(splittedPhraseChars[0], 1).ToLower().ToCharArray()[0];
-        return new String(splittedPhraseChars);
+        chars[0] = new string(chars[0], 1).ToLower().ToCharArray()[0];
+        return new String(chars);
       }
       return str;
     }
+
     public static string ToProperCase(this string str)
     {
-      var splittedPhraseChars = str.ToCharArray();
-      if (splittedPhraseChars.Length > 0)
+      var chars = str.ToCharArray();
+      if (chars.Length > 0)
+      {
+        chars[0] = new string(chars[0], 1).ToUpper().ToCharArray()[0];
+        return new String(chars);
+      }
+      return str;
+    }
+
+    public static string Dasherize(this string str)
+    {
+      var chars = str.ToCharArray();
+      if (chars.Length > 0)
       {
-        splittedPhraseChars[0] = new string(splittedPhraseChars[0], 1).ToUpper().ToCharArray()[0];
-        return new String(splittedPhraseChars);
+        var builder = new StringBuilder();
+        for(var i = 0; i  < chars.Length; i++)
+        {
+          if(char.IsUpper(chars[i])) {
+            var hashedString = (i > 0) ? $"-{char.ToLower(chars[i])}" : $"{char.ToLower(chars[i])}";
+            builder.Append(hashedString);
+          }
+          else {
+            builder.Append(chars[i]);
+          }
+        }
+        return builder.ToString();
       }
       return str;
     }

JsonApiDotNetCore/JsonApi/DocumentBuilder.cs

@@ -73,7 +73,7 @@ private Dictionary<string, object> BuildRelationshipsObject(IJsonApiResource res
       _context.GetEntityType().GetProperties().Where(propertyInfo => propertyInfo.GetMethod.IsVirtual).ToList().ForEach(
         virtualProperty =>
         {
-          relationships.Add(virtualProperty.Name, GetRelationshipLinks(resource, virtualProperty.Name.ToCamelCase()));
+          relationships.Add(virtualProperty.Name.Dasherize(), GetRelationshipLinks(resource, virtualProperty.Name.Dasherize().Dasherize()));
         });
       return relationships;
     }

JsonApiDotNetCoreTests/Extensions/UnitTests/StringExtensionsTests.cs

@@ -28,5 +28,19 @@ public void ToProperCase_ConvertsString_ToProperCase(string input, string expect
             // assert
             Assert.Equal(expectedOutput, result);
         }
+
+        [Theory]
+        [InlineData("todoItem", "todo-item")]
+        [InlineData("TodoItem", "todo-item")]
+        [InlineData("TodoItemS", "todo-item-s")]
+        public void Dasherize_Converts_StringToDashed(string input, string expectedOutput)
+        {
+            // arrange
+            // act
+            var result = input.Dasherize();
+
+            // assert
+            Assert.Equal(expectedOutput, result);
+        }
     }
 }