LINQ conditional support

.gitignore

@@ -167,3 +167,6 @@ $RECYCLE.BIN/
 
 # Mac desktop service store files
 .DS_Store
+
+# Jetbrains Rider
+.idea

src/ArangoDB.Client.Test/Linq/SimpleQuery.cs

@@ -32,6 +32,25 @@ public void FromWithSelect()
 
             Assert.Equal("for `p` in `Person` return `p`", query.GetQueryData().Query.RemoveSpaces());
         }
+
+        [Fact]
+        public void FromWithSelectNewTernary()
+        {
+            var db = DatabaseGenerator.Get();
+            var query = from p in db.Query<Person>()
+                      select new Person
+                      {
+                          Fullname = p.Age > 10 ? p.Fullname : "",
+                          Outfit = p.Age < 10 ? p.Outfit : null
+                      };
+            var queryText = query.GetQueryData().Query.RemoveSpaces();
+            Assert.Equal(
+@"for `p` in `Person` 
+return {
+ `Fullname` : ( `p`.`Age` > @P1 ) ? `p`.`Fullname` : @P2 ,
+ `Outfit` : ( `p`.`Age` < @P3 ) ? `p`.`Outfit` : @P4 
+}".RemoveSpaces(), queryText);
+        }
 
         [Fact]
         public void FromWithSelectNew()

src/ArangoDB.Client/Query/ArangoExpressionTreeVisitor.cs

@@ -27,6 +27,16 @@ public ArangoExpressionTreeVisitor(ArangoModelVisitor modelVisitor)
             this.ModelVisitor = modelVisitor;
         }
 
+        protected override Expression VisitConditional(ConditionalExpression expression)
+        {
+            VisitBinary(expression.Test as BinaryExpression);
+            ModelVisitor.QueryText.Append(" ? ");
+            Visit(expression.IfTrue);
+            ModelVisitor.QueryText.Append(" : ");
+            Visit(expression.IfFalse);
+            return expression;
+        }
+
         protected override Expression VisitMethodCall(MethodCallExpression expression)
         {
             if (expression.Method.Name == "As")