Add JsConfig.ExcludeDefaultValues

Author: mythz

src/ServiceStack.Text/Common/WriteType.cs

@@ -305,7 +305,7 @@ public TypePropertyWriter(string propertyName, string propertyDeclaredTypeName,
 
             public bool ShouldWriteProperty(object propertyValue)
             {
-                if (propertySuppressDefaultAttribute && Equals(DefaultValue, propertyValue))
+                if ((propertySuppressDefaultAttribute || JsConfig.ExcludeDefaultValues) && Equals(DefaultValue, propertyValue))
                     return false;
 
                 if (!Serializer.IncludeNullValues

src/ServiceStack.Text/JsConfig.cs

@@ -33,6 +33,7 @@ public static JsConfigScope With(
             bool? tryToParseNumericType = null,
 			ParseAsType? parsePrimitiveFloatingPointTypes = null,
 			ParseAsType? parsePrimitiveIntegerTypes = null,
+            bool? excludeDefaultValues = null,
             bool? includeNullValues = null,
             bool? includeDefaultEnums = null,
             bool? excludeTypeInfo = null,
@@ -67,6 +68,7 @@ public static JsConfigScope With(
 				ParsePrimitiveFloatingPointTypes = parsePrimitiveFloatingPointTypes ?? sParsePrimitiveFloatingPointTypes,
 				ParsePrimitiveIntegerTypes = parsePrimitiveIntegerTypes ?? sParsePrimitiveIntegerTypes,
 
+                ExcludeDefaultValues = excludeDefaultValues ?? sExcludeDefaultValues,
                 IncludeNullValues = includeNullValues ?? sIncludeNullValues,
                 IncludeDefaultEnums = includeDefaultEnums ?? sIncludeDefaultEnums,
                 ExcludeTypeInfo = excludeTypeInfo ?? sExcludeTypeInfo,
@@ -169,6 +171,21 @@ public static ParseAsType ParsePrimitiveIntegerTypes
 			}
 		}
 
+        private static bool? sExcludeDefaultValues;
+        public static bool ExcludeDefaultValues
+        {
+            get
+            {
+                return (JsConfigScope.Current != null ? JsConfigScope.Current.ExcludeDefaultValues : null)
+                    ?? sExcludeDefaultValues
+                    ?? false;
+            }
+            set
+            {
+                if (!sExcludeDefaultValues.HasValue) sExcludeDefaultValues = value;
+            }
+        }
+
         private static bool? sIncludeNullValues;
         public static bool IncludeNullValues
         {
@@ -689,6 +706,7 @@ public static void Reset()
             sTryToParsePrimitiveTypeValues = null;
             sTryToParseNumericType = null;
             sConvertObjectTypesIntoStringDictionary = null;
+            sExcludeDefaultValues = null;
             sIncludeNullValues = null;
             sExcludeTypeInfo = null;
             sEmitCamelCaseNames = null;

src/ServiceStack.Text/JsConfigScope.cs

@@ -58,6 +58,7 @@ public void Dispose()
 		public bool? TryToParseNumericType { get; set; }
 		public ParseAsType? ParsePrimitiveFloatingPointTypes { get; set; }
 		public ParseAsType? ParsePrimitiveIntegerTypes { get; set; }
+        public bool? ExcludeDefaultValues { get; set; }
         public bool? IncludeNullValues { get; set; }
         public bool? IncludeDefaultEnums { get; set; }
         public bool? TreatEnumAsInteger { get; set; }

tests/ServiceStack.Text.Tests/JsonTests/ConditionalSerializationTests.cs

@@ -146,5 +146,23 @@ public object OnDeserializing(string fieldName, object value)
                 return value;
             }
         }
+
+        [DataContract]
+        public class HasEmitDefaultValue
+        {
+            [DataMember(EmitDefaultValue = false)]
+            public int DontEmitDefaultValue { get; set; }
+
+            [DataMember]
+            public int IntValue { get; set; }
+        }
+
+        [Test]
+        public void Does_exclude_default_property_with_EmitDefaultValue()
+        {
+            var dto = new HasEmitDefaultValue();
+
+            Assert.That(dto.ToJson(), Is.EqualTo("{\"IntValue\":0}"));
+        }
     }
 }

tests/ServiceStack.Text.Tests/JsonTests/ModelWithAllTypesTests.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Runtime.Serialization;
 using NUnit.Framework;
 using ServiceStack.Text.Tests.DynamicModels;
 
@@ -43,6 +44,22 @@ public void Can_Serialize_map()
 			Console.WriteLine(s);
 		}
 
+	    public class ModelWithValueTypes
+	    {
+            public int Int { get; set; }
+            public long Long { get; set; }
+            public float Float { get; set; }
+            public double Double { get; set; }
+	    }
 
+	    [Test]
+        public void Does_ExcludeDefaultValues()
+	    {
+	        JsConfig.ExcludeDefaultValues = true;
+
+            var dto = new ModelWithValueTypes();
+
+            Assert.That(dto.ToJson(), Is.EqualTo("{}"));
+        }
 	}
 }