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fix: tagged enum with flatten fields #1208

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fix: tagged enum with flatten fields #1208

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11 changes: 10 additions & 1 deletion utoipa-gen/src/component/schema.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -313,6 +313,7 @@ pub struct NamedStructSchema {
pub schema_as: Option<As>,
fields_references: Vec<SchemaReference>,
bound: Option<Bound>,
is_all_of: bool,
}

#[cfg_attr(feature = "debug", derive(Debug))]
Expand Down Expand Up @@ -385,6 +386,7 @@ impl NamedStructSchema {
.flatten()
.collect::<Vec<_>>();

let mut object_tokens_empty = true;
let object_tokens = fields_vec
.iter()
.filter(|(_, field_rules, ..)| !field_rules.skip && !field_rules.flatten)
Expand Down Expand Up @@ -415,6 +417,7 @@ impl NamedStructSchema {
_field,
field_schema,
)| {
object_tokens_empty = false;
let rename_to = field_rules
.rename
.as_deref()
Expand Down Expand Up @@ -513,8 +516,13 @@ impl NamedStructSchema {
tokens.extend(quote! {
utoipa::openapi::AllOfBuilder::new()
#flattened_tokens
.item(#object_tokens)

});
if !object_tokens_empty {
tokens.extend(quote! {
.item(#object_tokens)
});
}
true
}
} else {
Expand Down Expand Up @@ -552,6 +560,7 @@ impl NamedStructSchema {
schema_as,
fields_references,
bound,
is_all_of: all_of,
})
}

Expand Down
22 changes: 17 additions & 5 deletions utoipa-gen/src/component/schema/enums.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -517,12 +517,24 @@ impl MixedEnumContent {
MixedEnumContent::split_enum_features(variant_features);
let schema = NamedStructSchema::new(root, fields, variant_features)?;

let schema_tokens = schema.to_token_stream();
let mut schema_tokens = schema.to_token_stream();
(
EnumSchema::<ObjectSchema>::tagged(schema_tokens)
.tag(tag, PlainSchema::for_name(name.as_ref()))
.features(enum_features)
.to_token_stream(),
if schema.is_all_of {
let object_builder_tokens = quote! { utoipa::openapi::schema::Object::builder() };
let enum_schema_tokens = EnumSchema::<ObjectSchema>::tagged(object_builder_tokens)
.tag(tag, PlainSchema::for_name(name.as_ref()))
.features(enum_features)
.to_token_stream();
schema_tokens.extend(quote! {
.item(#enum_schema_tokens)
});
schema_tokens
} else {
EnumSchema::<ObjectSchema>::tagged(schema_tokens)
.tag(tag, PlainSchema::for_name(name.as_ref()))
.features(enum_features)
.to_token_stream()
},
schema.fields_references,
)
}
Expand Down
49 changes: 49 additions & 0 deletions utoipa-gen/tests/schema_derive_test.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1089,6 +1089,55 @@ fn derive_simple_enum_serde_tag() {
);
}

#[test]
fn derive_simple_enum_serde_tag_with_flatten_content() {
#[derive(Serialize, ToSchema)]
#[allow(unused)]
struct Foo {
name: &'static str,
}

let value: Value = api_doc! {
#[derive(Serialize)]
#[serde(tag = "tag")]
enum Bar {
One {
#[serde(flatten)]
foo: Foo,
},
}
};

assert_json_eq!(
value,
json!({
"oneOf": [
{
"allOf": [
{
"$ref": "#/components/schemas/Foo",
},
{
"type": "object",
"properties": {
"tag": {
"type": "string",
"enum": [
"One",
],
},
},
"required": [
"tag",
],
},
],
},
],
})
);
}

#[test]
fn derive_simple_enum_serde_untagged() {
let value: Value = api_doc! {
Expand Down
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