Ensure arrays and objects serialize correctly

src/sql/value.rs

@@ -8,7 +8,9 @@ use crate::sql::literal::Literal;
 use serde::{Deserialize, Serialize};
 use std::fmt;
 
-#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Serialize, Deserialize)]
+const NAME: &'static str = "Value";
+
+#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Deserialize)]
 pub enum Value {
 	Literal(Literal),
 	Expression(Expression),
@@ -54,3 +56,22 @@ impl dbs::Process for Value {
 		}
 	}
 }
+
+impl Serialize for Value {
+	fn serialize<S>(&self, s: S) -> Result<S::Ok, S::Error>
+	where
+		S: serde::Serializer,
+	{
+		if s.is_human_readable() {
+			match self {
+				Value::Literal(ref v) => s.serialize_some(v),
+				Value::Expression(ref v) => s.serialize_some(v),
+			}
+		} else {
+			match self {
+				Value::Literal(ref v) => s.serialize_newtype_variant(NAME, 0, "Literal", v),
+				Value::Expression(ref v) => s.serialize_newtype_variant(NAME, 1, "Expression", v),
+			}
+		}
+	}
+}