Added 'DocumentMeta' to IJsonApiContext

Author: lheiskan

src/JsonApiDotNetCore/Serialization/JsonApiDeSerializer.cs

@@ -29,6 +29,7 @@ public object Deserialize(string requestBody)
             try
             {
                 var document = JsonConvert.DeserializeObject<Document>(requestBody);
+                _jsonApiContext.DocumentMeta = document.Meta;
                 var entity = DocumentToObject(document.Data);
                 return entity;
             }
@@ -222,4 +223,4 @@ private object SetHasManyRelationship(object entity,
             return entity;
         }
     }
-}
+}

test/UnitTests/Serialization/JsonApiDeSerializerTests.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using JsonApiDotNetCore.Builders;
 using JsonApiDotNetCore.Configuration;
@@ -271,6 +271,54 @@ public void Can_Deserialize_Independent_Side_Of_One_To_One_Relationship_With_Rel
             Assert.Equal(property, result.Property);
         }
 
+        [Fact]
+        public void Sets_The_DocumentMeta_Property_In_JsonApiContext()
+        {
+            // arrange
+            var contextGraphBuilder = new ContextGraphBuilder();
+            contextGraphBuilder.AddResource<Independent>("independents");
+            contextGraphBuilder.AddResource<Dependent>("dependents");
+            var contextGraph = contextGraphBuilder.Build();
+
+            var jsonApiContextMock = new Mock<IJsonApiContext>();
+            jsonApiContextMock.SetupAllProperties();
+            jsonApiContextMock.Setup(m => m.ContextGraph).Returns(contextGraph);
+            jsonApiContextMock.Setup(m => m.AttributesToUpdate).Returns(new Dictionary<AttrAttribute, object>());
+
+            var jsonApiOptions = new JsonApiOptions();
+            jsonApiContextMock.Setup(m => m.Options).Returns(jsonApiOptions);
+
+            var genericProcessorFactoryMock = new Mock<IGenericProcessorFactory>();
+
+            var deserializer = new JsonApiDeSerializer(jsonApiContextMock.Object, genericProcessorFactoryMock.Object);
+
+            var property = Guid.NewGuid().ToString();
+            
+            var content = new Document
+            {   
+                Meta = new Dictionary<string, object>() { {"foo", "bar"}},
+                Data = new DocumentData
+                {
+                    Type = "independents",
+                    Id = "1",
+                    Attributes = new Dictionary<string, object> { { "property", property }
+                    },
+                    // a common case for this is deserialization in unit tests
+                    Relationships = new Dictionary<string, RelationshipData> { { "dependent", new RelationshipData { } }
+                    }
+                }
+            };
+
+            var contentString = JsonConvert.SerializeObject(content);
+
+            // act
+            var result = deserializer.Deserialize<Independent>(contentString);
+
+            // assert
+            jsonApiContextMock.VerifySet(mock => mock.DocumentMeta = content.Meta);
+        }
+
+
         private class TestResource : Identifiable {
             [Attr("complex-member")]
             public ComplexType ComplexMember { get; set; }