go: Emit null instead of {} for when struct enum config field is nil

Author: svix-mman

go/models/ingest_source_in.go

@@ -145,7 +145,7 @@ var IngestSourceInTypeWithNoConfig = map[string]bool{
 func (i IngestSourceIn) MarshalJSON() ([]byte, error) {
 	type Alias IngestSourceIn
 	if _, found := IngestSourceInTypeWithNoConfig[string(i.Type)]; found {
-		i.Config = emptyMap{}
+		i.Config = nil
 	}
 	return json.Marshal(&struct{ Alias }{Alias: (Alias)(i)})
 }

go/models/ingest_source_out.go

@@ -150,7 +150,7 @@ var IngestSourceOutTypeWithNoConfig = map[string]bool{
 func (i IngestSourceOut) MarshalJSON() ([]byte, error) {
 	type Alias IngestSourceOut
 	if _, found := IngestSourceOutTypeWithNoConfig[string(i.Type)]; found {
-		i.Config = emptyMap{}
+		i.Config = nil
 	}
 	return json.Marshal(&struct{ Alias }{Alias: (Alias)(i)})
 }

openapi-templates/go/types/struct_enum.go.jinja

@@ -93,7 +93,7 @@ func (i {{ ty_name }}) MarshalJSON() ([]byte, error) {
 	type Alias {{ ty_name }}
 	{% if has_variant_with_no_schema_ref -%}
 	if _, found := {{ ty_name }}{{ discriminator_field }}WithNo{{ content_field }}[string(i.{{ discriminator_field }})]; found {
- 	   i.{{ content_field }} = emptyMap{}
+ 	   i.{{ content_field }} = nil
 	}
 	{% endif -%}
 	return json.Marshal(&struct {Alias}{Alias: (Alias)(i)})