feat: switch alias to json

backend/controller/ingress/alias.go

@@ -63,20 +63,20 @@ func transformAliasedFields(sch *schema.Schema, t schema.Type, obj any, aliaser
 
 func transformFromAliasedFields(dataRef *schema.DataRef, sch *schema.Schema, request map[string]any) (map[string]any, error) {
 	return request, transformAliasedFields(sch, dataRef, request, func(obj map[string]any, field *schema.Field) string {
-		if _, ok := obj[field.Name]; !ok && field.Alias != "" && obj[field.Alias] != nil {
-			obj[field.Name] = obj[field.Alias]
-			delete(obj, field.Alias)
+		if _, ok := obj[field.Name]; !ok && field.JSONAlias != "" && obj[field.JSONAlias] != nil {
+			obj[field.Name] = obj[field.JSONAlias]
+			delete(obj, field.JSONAlias)
 		}
 		return field.Name
 	})
 }
 
 func transformToAliasedFields(dataRef *schema.DataRef, sch *schema.Schema, request map[string]any) (map[string]any, error) {
 	return request, transformAliasedFields(sch, dataRef, request, func(obj map[string]any, field *schema.Field) string {
-		if field.Alias != "" && field.Name != field.Alias {
-			obj[field.Alias] = obj[field.Name]
+		if field.JSONAlias != "" && field.Name != field.JSONAlias {
+			obj[field.JSONAlias] = obj[field.Name]
 			delete(obj, field.Name)
-			return field.Alias
+			return field.JSONAlias
 		}
 		return field.Name
 	})

backend/controller/ingress/alias_test.go

@@ -12,11 +12,11 @@ func TestTransformFromAliasedFields(t *testing.T) {
 	schemaText := `
 		module test {
 			data Inner {
-				waz String alias foo
+				waz String alias json foo
 			}
 
 			data Test {
-				scalar String alias bar
+				scalar String alias json bar
 				inner Inner
 				array [Inner]
 				map {String: Inner}
@@ -72,11 +72,11 @@ func TestTransformToAliasedFields(t *testing.T) {
 	schemaText := `
 		module test {
 			data Inner {
-				waz String alias foo
+				waz String alias json foo
 			}
 
 			data Test {
-				scalar String alias bar
+				scalar String alias json bar
 				inner Inner
 				array [Inner]
 				map {String: Inner}

backend/controller/ingress/ingress_test.go

@@ -169,7 +169,7 @@ func TestResponseBodyForVerb(t *testing.T) {
 					&schema.Data{
 						Name: "Test",
 						Fields: []*schema.Field{
-							{Name: "message", Type: &schema.String{}, Alias: "msg"},
+							{Name: "message", Type: &schema.String{}, JSONAlias: "msg"},
 						},
 					},
 					jsonVerb,

backend/controller/ingress/request.go

@@ -280,7 +280,7 @@ func parseQueryParams(values url.Values, data *schema.Data) (map[string]any, err
 
 		var field *schema.Field
 		for _, f := range data.Fields {
-			if (f.Alias != "" && f.Alias == key) || f.Name == key {
+			if (f.JSONAlias != "" && f.JSONAlias == key) || f.Name == key {
 				field = f
 			}
 			for _, typeParam := range data.TypeParameters {

backend/controller/ingress/response.go

@@ -77,10 +77,10 @@ func bodyForType(typ schema.Type, sch *schema.Schema, data []byte) ([]byte, erro
 		}
 
 		err = transformAliasedFields(sch, t, response, func(obj map[string]any, field *schema.Field) string {
-			if field.Alias != "" && field.Name != field.Alias {
-				obj[field.Alias] = obj[field.Name]
+			if field.JSONAlias != "" && field.Name != field.JSONAlias {
+				obj[field.JSONAlias] = obj[field.Name]
 				delete(obj, field.Name)
-				return field.Alias
+				return field.JSONAlias
 			}
 			return field.Name
 		})

backend/schema/field.go

@@ -12,24 +12,24 @@ import (
 type Field struct {
 	Pos Position `parser:"" protobuf:"1,optional"`
 
-	Comments []string `parser:"@Comment*" protobuf:"3"`
-	Name     string   `parser:"@Ident" protobuf:"2"`
-	Type     Type     `parser:"@@" protobuf:"4"`
-	Alias    string   `parser:"('alias' @Ident)?" protobuf:"5"`
+	Comments  []string `parser:"@Comment*" protobuf:"3"`
+	Name      string   `parser:"@Ident" protobuf:"2"`
+	Type      Type     `parser:"@@" protobuf:"4"`
+	JSONAlias string   `parser:"('alias' 'json' @Ident)?" protobuf:"5"`
 }
 
 var _ Node = (*Field)(nil)
 
 func (f *Field) Position() Position     { return f.Pos }
 func (f *Field) schemaChildren() []Node { return []Node{f.Type} }
 func (f *Field) String() string {
-	alias := ""
-	if f.Alias != "" {
-		alias = fmt.Sprintf(" alias %s", f.Alias)
+	jsonAlias := ""
+	if f.JSONAlias != "" {
+		jsonAlias = fmt.Sprintf(" alias json %s", f.JSONAlias)
 	}
 	w := &strings.Builder{}
 	fmt.Fprint(w, encodeComments(f.Comments))
-	fmt.Fprintf(w, "%s %s%s", f.Name, f.Type.String(), alias)
+	fmt.Fprintf(w, "%s %s%s", f.Name, f.Type.String(), jsonAlias)
 	return w.String()
 }
 
@@ -39,7 +39,7 @@ func (f *Field) ToProto() proto.Message {
 		Name:     f.Name,
 		Type:     typeToProto(f.Type),
 		Comments: f.Comments,
-		Alias:    f.Alias,
+		Alias:    f.JSONAlias,
 	}
 }
 
@@ -53,10 +53,10 @@ func fieldListToSchema(s []*schemapb.Field) []*Field {
 
 func fieldToSchema(s *schemapb.Field) *Field {
 	return &Field{
-		Pos:      posFromProto(s.Pos),
-		Name:     s.Name,
-		Comments: s.Comments,
-		Type:     typeToSchema(s.Type),
-		Alias:    s.Alias,
+		Pos:       posFromProto(s.Pos),
+		Name:      s.Name,
+		Comments:  s.Comments,
+		Type:      typeToSchema(s.Type),
+		JSONAlias: s.Alias,
 	}
 }

backend/schema/schema_test.go

@@ -20,11 +20,11 @@ func TestSchemaString(t *testing.T) {
 // A comment
 module todo {
   data CreateRequest {
-    name {String: String}? alias rqn
+    name {String: String}? alias json rqn
   }
 
   data CreateResponse {
-    name [String] alias rsn
+    name [String] alias json rsn
   }
 
   data DestroyRequest {
@@ -340,10 +340,10 @@ func TestParseModule(t *testing.T) {
 // A comment
 module todo {
   data CreateRequest {
-    name {String: String}? alias rqn
+    name {String: String}? alias json rqn
   }
   data CreateResponse {
-    name [String] alias rsn
+    name [String] alias json rsn
   }
   data DestroyRequest {
     // A comment
@@ -374,13 +374,13 @@ var testSchema = MustValidate(&Schema{
 				&Data{
 					Name: "CreateRequest",
 					Fields: []*Field{
-						{Name: "name", Type: &Optional{Type: &Map{Key: &String{}, Value: &String{}}}, Alias: "rqn"},
+						{Name: "name", Type: &Optional{Type: &Map{Key: &String{}, Value: &String{}}}, JSONAlias: "rqn"},
 					},
 				},
 				&Data{
 					Name: "CreateResponse",
 					Fields: []*Field{
-						{Name: "name", Type: &Array{Element: &String{}}, Alias: "rsn"},
+						{Name: "name", Type: &Array{Element: &String{}}, JSONAlias: "rsn"},
 					},
 				},
 				&Data{

go-runtime/compile/schema.go

@@ -29,7 +29,7 @@ var (
 	})
 	ftlCallFuncPath = "github.com/TBD54566975/ftl/go-runtime/ftl.Call"
 
-	aliasFieldTag = "alias"
+	aliasFieldTag = "json"
 )
 
 // NativeNames is a map of top-level declarations to their native Go names.
@@ -418,10 +418,10 @@ func visitStruct(pctx *parseContext, node ast.Node, tnode types.Type) (*schema.D
 		}
 
 		out.Fields = append(out.Fields, &schema.Field{
-			Pos:   goPosToSchemaPos(node.Pos()),
-			Name:  strcase.ToLowerCamel(f.Name()),
-			Type:  ft,
-			Alias: reflect.StructTag(s.Tag(i)).Get(aliasFieldTag),
+			Pos:       goPosToSchemaPos(node.Pos()),
+			Name:      strcase.ToLowerCamel(f.Name()),
+			Type:      ft,
+			JSONAlias: reflect.StructTag(s.Tag(i)).Get(aliasFieldTag),
 		})
 	}
 	pctx.module.AddData(out)

go-runtime/compile/schema_test.go

@@ -32,7 +32,7 @@ func TestExtractModuleSchema(t *testing.T) {
     nested one.Nested
     optional one.Nested?
     time Time
-    user two.User alias u
+    user two.User alias json u
     bytes Bytes
   }
 

go-runtime/compile/testdata/one/one.go

@@ -22,7 +22,7 @@ type Req struct {
 	Nested   Nested
 	Optional ftl.Option[Nested]
 	Time     time.Time
-	User     two.User `alias:"u"`
+	User     two.User `json:"u"`
 	Bytes    []byte
 }
 type Resp struct{}

integration/testdata/go/httpingress/echo.go

@@ -11,17 +11,17 @@ import (
 )
 
 type GetRequest struct {
-	UserID string `alias:"userId"`
-	PostID string `alias:"postId"`
+	UserID string `json:"userId"`
+	PostID string `json:"postId"`
 }
 
 type Nested struct {
-	GoodStuff string `alias:"good_stuff"`
+	GoodStuff string `json:"good_stuff"`
 }
 
 type GetResponse struct {
-	Message string `alias:"msg"`
-	Nested  Nested `alias:"nested"`
+	Message string `json:"msg"`
+	Nested  Nested `json:"nested"`
 }
 
 //ftl:verb
@@ -39,12 +39,12 @@ func Get(ctx context.Context, req builtin.HttpRequest[GetRequest]) (builtin.Http
 }
 
 type PostRequest struct {
-	UserID int `alias:"user_id"`
+	UserID int `json:"user_id"`
 	PostID int
 }
 
 type PostResponse struct {
-	Success bool `alias:"success"`
+	Success bool `json:"success"`
 }
 
 //ftl:verb
@@ -58,8 +58,8 @@ func Post(ctx context.Context, req builtin.HttpRequest[PostRequest]) (builtin.Ht
 }
 
 type PutRequest struct {
-	UserID string `alias:"userId"`
-	PostID string `alias:"postId"`
+	UserID string `json:"userId"`
+	PostID string `json:"postId"`
 }
 
 type PutResponse struct{}
@@ -74,7 +74,7 @@ func Put(ctx context.Context, req builtin.HttpRequest[PutRequest]) (builtin.Http
 }
 
 type DeleteRequest struct {
-	UserID string `alias:"userId"`
+	UserID string `json:"userId"`
 }
 
 type DeleteResponse struct{}
@@ -154,7 +154,7 @@ func ArrayString(ctx context.Context, req builtin.HttpRequest[[]string]) (builti
 }
 
 type ArrayType struct {
-	Item string `alias:"item"`
+	Item string `json:"item"`
 }
 
 //ftl:verb

integration/testdata/kotlin/httpingress/Echo.kt

@@ -5,46 +5,46 @@ import ftl.builtin.HttpRequest
 import ftl.builtin.HttpResponse
 import kotlin.String
 import kotlin.Unit
-import xyz.block.ftl.Alias
+import xyz.block.ftl.Json
 import xyz.block.ftl.Context
 import xyz.block.ftl.HttpIngress
 import xyz.block.ftl.Method
 import xyz.block.ftl.Verb
 
 data class GetRequest(
-  @Alias("userId") val userID: String,
-  @Alias("postId") val postID: String,
+  @Json("userId") val userID: String,
+  @Json("postId") val postID: String,
 )
 
 data class Nested(
-  @Alias("good_stuff") val goodStuff: String,
+  @Json("good_stuff") val goodStuff: String,
 )
 
 data class GetResponse(
-  @Alias("msg") val message: String,
-  @Alias("nested") val nested: Nested,
+  @Json("msg") val message: String,
+  @Json("nested") val nested: Nested,
 )
 
 data class PostRequest(
-  @Alias("user_id") val userId: Int,
+  @Json("user_id") val userId: Int,
   val postId: Int,
 )
 
 data class PostResponse(
-  @Alias("success") val success: Boolean,
+  @Json("success") val success: Boolean,
 )
 
 data class PutRequest(
-  @Alias("userId") val userID: String,
-  @Alias("postId") val postID: String,
+  @Json("userId") val userID: String,
+  @Json("postId") val postID: String,
 )
 
 data class DeleteRequest(
-  @Alias("userId") val userID: String,
+  @Json("userId") val userID: String,
 )
 
 data class ArrayType(
-  @Alias("item") val item: String,
+  @Json("item") val item: String,
 )
 
 @Verb

kotlin-runtime/ftl-generator/src/main/kotlin/xyz/block/ftl/generator/ModuleGenerator.kt

@@ -77,9 +77,9 @@ class ModuleGenerator {
         dataConstructorBuilder.addParameter(parameter.build())
         dataClassBuilder.addProperty(
           PropertySpec.builder(field.name, getTypeClass(type, namespace)).initializer(field.name).let {
-            if (field.alias != "") {
+            if (field.jsonAlias != "") {
               it.addAnnotation(
-                AnnotationSpec.builder(xyz.block.ftl.Alias::class).addMember("%S", field.alias).build()
+                AnnotationSpec.builder(xyz.block.ftl.Json::class).addMember("%S", field.jsonAlias).build()
               )
             } else {
               it