feat(json): Add feature to expose JSON as raw scalar

Cargo.toml

@@ -26,6 +26,7 @@ fnv = { version = "1.0.7" }
 [features]
 default = ["field-camel-case"]
 with-json = ["sea-orm/with-json"]
+with-json-as-scalar = ["with-json"]
 with-chrono = ["sea-orm/with-chrono", "async-graphql/chrono"]
 with-time = ["sea-orm/with-time", "async-graphql/time"]
 with-uuid = ["sea-orm/with-uuid"]

src/builder.rs

@@ -264,6 +264,15 @@ impl Builder {
             .into_iter()
             .fold(schema, |schema, cur| schema.register(cur));
 
+        #[cfg(feature = "with-json-as-scalar")]
+        let schema = schema.register(
+            async_graphql::dynamic::Scalar::new(&self.context.types.json_name)
+                .description("The `JSON` scalar type represents raw JSON values")
+                .specified_by_url(
+                    "http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf",
+                ),
+        );
+
         schema
             .register(
                 OrderByEnumBuilder {

src/builder_context/types_map.rs

@@ -23,6 +23,10 @@ pub struct TypesMapConfig {
     pub time_library: TimeLibrary,
     /// used to configure default decimal library
     pub decimal_library: DecimalLibrary,
+
+    #[cfg(feature = "with-json-as-scalar")]
+    /// used to expose Json as a Scalar
+    pub json_name: String,
 }
 
 impl std::default::Default for TypesMapConfig {
@@ -45,6 +49,9 @@ impl std::default::Default for TypesMapConfig {
             decimal_library: DecimalLibrary::Decimal,
             #[cfg(all(not(feature = "with-decimal"), feature = "with-bigdecimal"))]
             decimal_library: DecimalLibrary::BigDecimal,
+
+            #[cfg(feature = "with-json-as-scalar")]
+            json_name: "Json".to_owned(),
         }
     }
 }
@@ -159,14 +166,9 @@ impl TypesMapHelper {
             ColumnType::Boolean => ConvertedType::Bool,
 
             #[cfg(not(feature = "with-json"))]
-            ColumnType::Json => ConvertedType::String,
+            ColumnType::Json | ColumnType::JsonBinary => ConvertedType::String,
             #[cfg(feature = "with-json")]
-            ColumnType::Json => ConvertedType::Json,
-
-            // FIXME: how should we map them JsonBinary type ?
-            // #[cfg(feature = "with-json")]
-            // ColumnType::JsonBinary => ConvertedType::Json,
-            ColumnType::JsonBinary => ConvertedType::String,
+            ColumnType::Json | ColumnType::JsonBinary => ConvertedType::Json,
 
             #[cfg(not(feature = "with-uuid"))]
             ColumnType::Uuid => ConvertedType::String,
@@ -280,7 +282,10 @@ impl TypesMapHelper {
                 | ColumnType::Blob => Some(TypeRef::named(TypeRef::STRING)),
                 ColumnType::Boolean => Some(TypeRef::named(TypeRef::BOOLEAN)),
                 // FIXME: support json type
+                #[cfg(not(feature = "with-json-as-scalar"))]
                 ColumnType::Json | ColumnType::JsonBinary => None,
+                #[cfg(feature = "with-json-as-scalar")]
+                ColumnType::Json | ColumnType::JsonBinary => Some(TypeRef::named(&self.context.types.json_name)),
                 ColumnType::Uuid => Some(TypeRef::named(TypeRef::STRING)),
                 ColumnType::Enum {
                     name: enum_name,
@@ -850,4 +855,4 @@ pub fn decode_hex(s: &str) -> Result<Vec<u8>, ParseIntError> {
         .step_by(2)
         .map(|i| u8::from_str_radix(&s[i..i + 2], 16))
         .collect()
-}
+}

src/outputs/entity_object.rs

@@ -236,7 +236,13 @@ fn sea_query_value_to_graphql_value(
 
         #[cfg(feature = "with-json")]
         #[cfg_attr(docsrs, doc(cfg(feature = "with-json")))]
-        sea_orm::sea_query::Value::Json(value) => value.map(|it| Value::from(it.to_string())),
+        sea_orm::sea_query::Value::Json(value) => value.map(|it| {
+            if cfg!(feature = "with-json-as-scalar") {
+                Value::from_json((*it).clone()).expect("Unable to serialize")
+            } else {
+                Value::from(it.to_string())
+            }
+        }),
 
         #[cfg(feature = "with-chrono")]
         #[cfg_attr(docsrs, doc(cfg(feature = "with-chrono")))]