Fix rel issue

Author: owjs3901

README.md

@@ -441,6 +441,57 @@ vespera::schema_type!(Schema from Model, name = "MemoSchema");
 
 **Circular Reference Handling:** When schemas reference each other (e.g., User ↔ Memo), the macro automatically detects and handles circular references by inlining fields to prevent infinite recursion.
 
+### Same-File Relation Adapters
+
+For response DTOs that live in the same route file, `schema_type!` can now keep the handler code unchanged even when a SeaORM relation should be exposed through a custom local DTO.
+
+Example:
+
+```rust
+#[derive(Serialize, vespera::Schema)]
+#[serde(rename_all = "camelCase")]
+pub struct UserInArticle {
+    pub id: Uuid,
+    pub name: String,
+    pub email: String,
+    pub profile_image: Option<String>,
+}
+
+#[derive(Serialize, vespera::Schema)]
+#[serde(rename_all = "camelCase")]
+pub struct CategoryInArticle {
+    pub id: i64,
+    pub name: String,
+    pub parent_category_id: Option<i64>,
+    pub is_active: bool,
+    pub is_menu: bool,
+}
+
+schema_type!(
+    ArticleResponse from crate::models::article::Model,
+    add = [("article_review_users": Vec<ArticleReviewUserInArticle>)]
+);
+
+// Existing handler code stays valid.
+Ok(ArticleResponse {
+    user: user.into(),
+    category: category.into(),
+    article_review_users,
+    ..
+})
+```
+
+How it works:
+
+- `schema_type!` looks for same-file DTOs named `{RelationNamePascal}In{ResponseBase}`
+  - `user` on `ArticleResponse` → `UserInArticle`
+  - `category` on `ArticleResponse` → `CategoryInArticle`
+- It generates local compile adapters so `Option<Model>.into()` works unchanged in the handler
+- Those adapters stay internal to Rust typing
+- OpenAPI does **not** expose the generated adapter wrapper names; the spec still points at the original related schemas (`UserSchema`, `CategorySchema`)
+
+Use this when you want route-local response DTOs for single-value relations (`HasOne` / `BelongsTo`) without rewriting the route construction logic.
+
 ### Multipart Mode
 
 Generate `Multipart` structs from existing types using the `multipart` keyword:

SKILL.md

@@ -397,6 +397,55 @@ vespera::schema_type!(Schema from Model, name = "MemoSchema");
 
 **Required Logic:** `required` is determined **solely by nullability** (`Option<T>`). Fields with `#[serde(default)]` or `#[serde(skip_serializing_if)]` are still `required` unless they are `Option<T>`.
 
+### Same-File Relation Adapters
+
+When a route file defines a local response DTO for a relation, Vespera can preserve unchanged handler code while still generating the right OpenAPI.
+
+Example:
+
+```rust
+#[derive(Serialize, vespera::Schema)]
+#[serde(rename_all = "camelCase")]
+pub struct UserInArticle {
+    pub id: Uuid,
+    pub name: String,
+    pub email: String,
+    pub profile_image: Option<String>,
+}
+
+#[derive(Serialize, vespera::Schema)]
+#[serde(rename_all = "camelCase")]
+pub struct CategoryInArticle {
+    pub id: i64,
+    pub name: String,
+    pub parent_category_id: Option<i64>,
+    pub is_active: bool,
+    pub is_menu: bool,
+}
+
+schema_type!(
+    ArticleResponse from crate::models::article::Model,
+    add = [("article_review_users": Vec<ArticleReviewUserInArticle>)]
+);
+
+Ok(ArticleResponse {
+    user: user.into(),
+    category: category.into(),
+    article_review_users,
+    ..
+})
+```
+
+Rules:
+
+- Only applies to single-value relations (`HasOne` / `BelongsTo`)
+- The local DTO name must follow `{RelationNamePascal}In{ResponseBase}`
+  - `user` on `ArticleResponse` → `UserInArticle`
+  - `category` on `ArticleResponse` → `CategoryInArticle`
+- Vespera generates local compile adapters so `Option<Model>.into()` works without changing the route
+- The adapter wrapper is hidden from OpenAPI; the spec still references the original related schema (`UserSchema`, `CategorySchema`)
+- `HasMany` relations remain excluded by default unless explicitly `pick`ed or `add`ed
+
 ### Complete Example
 
 ```rust

crates/vespera_macro/src/parser/schema/serde_attrs.rs

@@ -158,6 +158,48 @@ pub fn extract_rename_all(attrs: &[syn::Attribute]) -> Option<String> {
     None
 }
 
+/// Extract whether `#[serde(transparent)]` is present on a struct.
+pub fn extract_transparent(attrs: &[syn::Attribute]) -> bool {
+    attrs.iter().any(|attr| {
+        if !attr.path().is_ident("serde") {
+            return false;
+        }
+
+        let mut is_transparent = false;
+        let _ = attr.parse_nested_meta(|meta| {
+            if meta.path.is_ident("transparent") {
+                is_transparent = true;
+            }
+            Ok(())
+        });
+        is_transparent
+    })
+}
+
+/// Extract `#[schema(ref = "Name", nullable)]` override from a struct.
+pub fn extract_schema_ref_override(attrs: &[syn::Attribute]) -> Option<(String, bool)> {
+    attrs.iter().find_map(|attr| {
+        if !attr.path().is_ident("schema") {
+            return None;
+        }
+
+        let mut ref_name = None;
+        let mut nullable = false;
+        let _ = attr.parse_nested_meta(|meta| {
+            if meta.path.is_ident("ref") {
+                let value = meta.value()?;
+                let lit: syn::LitStr = value.parse()?;
+                ref_name = Some(lit.value());
+            } else if meta.path.is_ident("nullable") {
+                nullable = true;
+            }
+            Ok(())
+        });
+
+        ref_name.map(|name| (name, nullable))
+    })
+}
+
 pub fn extract_field_rename(attrs: &[syn::Attribute]) -> Option<String> {
     // First check serde attrs (higher priority)
     for attr in attrs {

crates/vespera_macro/src/parser/schema/struct_schema.rs

@@ -11,6 +11,8 @@ use vespera_core::schema::{Schema, SchemaRef, SchemaType};
 use super::{
     serde_attrs::{
         extract_doc_comment, extract_field_rename, extract_flatten, extract_rename_all,
+        extract_schema_ref_override,
+        extract_transparent,
         extract_skip, rename_field, strip_raw_prefix_owned,
     },
     type_schema::parse_type_to_schema_ref,
@@ -41,6 +43,45 @@ pub fn parse_struct_to_schema(
     // Extract struct-level doc comment for schema description
     let struct_description = extract_doc_comment(&struct_item.attrs);
 
+    if let Some((schema_name, nullable)) = extract_schema_ref_override(&struct_item.attrs) {
+        return Schema {
+            ref_path: Some(format!("#/components/schemas/{schema_name}")),
+            nullable: nullable.then_some(true),
+            description: struct_description,
+            ..Default::default()
+        };
+    }
+
+    // Transparent single-field wrappers should use the inner field schema directly.
+    if extract_transparent(&struct_item.attrs) {
+        let inner_field_ty = match &struct_item.fields {
+            Fields::Named(fields_named) if fields_named.named.len() == 1 => {
+                fields_named.named.first().map(|field| &field.ty)
+            }
+            Fields::Unnamed(fields_unnamed) if fields_unnamed.unnamed.len() == 1 => {
+                fields_unnamed.unnamed.first().map(|field| &field.ty)
+            }
+            _ => None,
+        };
+
+        if let Some(field_ty) = inner_field_ty {
+            let schema_ref = parse_type_to_schema_ref(field_ty, known_schemas, struct_definitions);
+            return match schema_ref {
+                SchemaRef::Inline(mut schema) => {
+                    if schema.description.is_none() {
+                        schema.description = struct_description;
+                    }
+                    *schema
+                }
+                SchemaRef::Ref(reference) => Schema {
+                    description: struct_description,
+                    all_of: Some(vec![SchemaRef::Ref(reference)]),
+                    ..Default::default()
+                },
+            };
+        }
+    }
+
     // Extract rename_all attribute from struct
     let rename_all = extract_rename_all(&struct_item.attrs);
 
@@ -245,6 +286,40 @@ mod tests {
         assert!(schema.required.is_none());
     }
 
+    #[test]
+    fn test_parse_struct_to_schema_serde_transparent_named_wrapper_uses_inner_schema() {
+        let struct_item: syn::ItemStruct = syn::parse_str(
+            r#"
+            #[serde(transparent)]
+            struct Wrapper {
+                value: Box<String>,
+            }
+        "#,
+        )
+        .unwrap();
+
+        let schema = parse_struct_to_schema(&struct_item, &HashSet::new(), &HashMap::new());
+        assert_eq!(schema.schema_type, Some(SchemaType::String));
+        assert!(schema.properties.is_none());
+    }
+
+    #[test]
+    fn test_parse_struct_to_schema_schema_ref_override() {
+        let struct_item: syn::ItemStruct = syn::parse_str(
+            r#"
+            #[schema(ref = "UserSchema", nullable)]
+            struct Wrapper {
+                value: Option<String>,
+            }
+        "#,
+        )
+        .unwrap();
+
+        let schema = parse_struct_to_schema(&struct_item, &HashSet::new(), &HashMap::new());
+        assert_eq!(schema.ref_path.as_deref(), Some("#/components/schemas/UserSchema"));
+        assert_eq!(schema.nullable, Some(true));
+    }
+
     // Test struct with skip field
     #[test]
     fn test_parse_struct_to_schema_with_skip_field() {

crates/vespera_macro/src/parser/schema/type_schema.rs

@@ -21,7 +21,7 @@ thread_local! {
 
 use super::{
     generics::substitute_type,
-    serde_attrs::{capitalize_first, extract_schema_name_from_entity},
+    serde_attrs::{capitalize_first, extract_schema_name_from_entity, extract_schema_ref_override},
     struct_schema::parse_struct_to_schema,
 };
 
@@ -317,6 +317,19 @@ fn parse_type_impl(
                     };
 
                     if known_schemas.contains(&resolved_name) {
+                        if let Some(def) = struct_definitions.get(&resolved_name)
+                            && let Ok(parsed_struct) = syn::parse_str::<syn::ItemStruct>(def)
+                            && let Some((schema_name, nullable)) =
+                                extract_schema_ref_override(&parsed_struct.attrs)
+                        {
+                            return SchemaRef::Inline(Box::new(Schema {
+                                ref_path: Some(format!("#/components/schemas/{schema_name}")),
+                                schema_type: None,
+                                nullable: nullable.then_some(true),
+                                ..Schema::new(SchemaType::Object)
+                            }));
+                        }
+
                         // Check if this is a generic type with type parameters
                         if let syn::PathArguments::AngleBracketed(args) = &segment.arguments {
                             // This is a concrete generic type like GenericStruct<String>

crates/vespera_macro/src/schema_impl.rs

@@ -81,6 +81,26 @@ pub fn process_derive_schema(
 
     // Schema-derived types appear in OpenAPI spec (include_in_openapi: true)
     let mut metadata = StructMetadata::new(schema_name, quote::quote!(#input).to_string());
+    if input.attrs.iter().any(|attr| attr.path().is_ident("schema")) {
+        let mut has_ref_override = false;
+        for attr in &input.attrs {
+            if !attr.path().is_ident("schema") {
+                continue;
+            }
+            let _ = attr.parse_nested_meta(|meta| {
+                if meta.path.is_ident("ref") {
+                    has_ref_override = true;
+                }
+                Ok(())
+            });
+            if has_ref_override {
+                break;
+            }
+        }
+        if has_ref_override {
+            metadata.include_in_openapi = false;
+        }
+    }
     metadata.field_defaults = field_defaults;
     (metadata, proc_macro2::TokenStream::new())
 }