feat(*): creating relationships

Author: jaredcnance

src/JsonApiDotNetCore/Models/DocumentData.cs

@@ -21,6 +21,7 @@ public string Type
         [JsonProperty("attributes")]
         public Dictionary<string, object> Attributes { get; set; }
 
+        
         [JsonProperty("relationships")]
         public Dictionary<string, Dictionary<string, object>> Relationships { get; set; }
     }

src/JsonApiDotNetCore/Serialization/JsonApiDeSerializer.cs

@@ -7,6 +7,7 @@
 using JsonApiDotNetCore.Models;
 using JsonApiDotNetCore.Services;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 
 namespace JsonApiDotNetCore.Serialization
 {
@@ -23,14 +24,17 @@ public static object Deserialize(string requestBody, IJsonApiContext context)
 
             var entity = Activator.CreateInstance(contextEntity.EntityType);
 
-            return _setEntityAttributes(entity, contextEntity, document.Data.Attributes);
+            entity = _setEntityAttributes(entity, contextEntity, document.Data.Attributes);
+            entity = _setRelationships(entity, contextEntity, document.Data.Relationships);
+            
+            return entity;
         }
 
         private static object _setEntityAttributes(
             object entity, ContextEntity contextEntity, Dictionary<string, object> attributeValues)
         {
             var entityProperties = entity.GetType().GetProperties();
-
+            
             foreach (var attr in contextEntity.Attributes)
             {
                 var entityProperty = entityProperties.FirstOrDefault(p => p.Name == attr.InternalAttributeName);
@@ -39,10 +43,38 @@ private static object _setEntityAttributes(
                     throw new ArgumentException($"{contextEntity.EntityType.Name} does not contain an attribute named {attr.InternalAttributeName}", nameof(entity));
 
                 object newValue;
-                if (attributeValues.TryGetValue(attr.PublicAttributeName, out newValue))
+                if (attributeValues.TryGetValue(attr.PublicAttributeName.Dasherize(), out newValue))
+                {
+                    var convertedValue = Convert.ChangeType(newValue, entityProperty.PropertyType);
+                    entityProperty.SetValue(entity, convertedValue);
+                }
+            }
+
+            return entity;
+        }
+
+        private static object _setRelationships(
+            object entity, ContextEntity contextEntity, Dictionary<string, Dictionary<string, object>> relationships)
+        {
+            if(relationships == null)
+                return entity;
+
+            var entityProperties = entity.GetType().GetProperties();
+            
+            foreach (var attr in contextEntity.Relationships)
+            {
+                var entityProperty = entityProperties.FirstOrDefault(p => p.Name == $"{attr.RelationshipName}Id");
+
+                if (entityProperty == null)
+                    throw new ArgumentException($"{contextEntity.EntityType.Name} does not contain an relationsip named {attr.RelationshipName}", nameof(entity));
+
+                Dictionary<string, object> relationshipData;
+                if (relationships.TryGetValue(attr.RelationshipName.Dasherize(), out relationshipData))
                 {
-                    Convert.ChangeType(newValue, entityProperty.PropertyType);
-                    entityProperty.SetValue(entity, newValue);
+                    var data = ((JObject)relationshipData["data"]).ToObject<Dictionary<string,string>>();
+                    var newValue = data["id"];
+                    var convertedValue = Convert.ChangeType(newValue, entityProperty.PropertyType);
+                    entityProperty.SetValue(entity, convertedValue);
                 }
             }