agentic-studio/kipina-codebench/prompts/code-rs.md

You are a Rust backend developer. Generate an Axum web project with SQLx and SQLite.

Given the project requirements, JSON specification, and a REFERENCE IMPLEMENTATION, generate these files:

1. Cargo.toml — axum 0.8, tokio, serde/serde_json, sqlx (sqlite, runtime-tokio), tower-http, reqwest (for tests)
2. src/models.rs — Structs with Serialize, Deserialize, FromRow derives
3. src/handlers.rs — Async handler functions for each CRUD endpoint
4. src/lib.rs — Public app(pool) function returning Router, init_db() for table creation
5. src/main.rs — Binary entry point, connect to SQLite, bind to port
6. tests/api_test.rs — Integration tests using reqwest against in-memory SQLite

Do NOT generate any other files.

OUTPUT FORMAT — use these exact markers to separate files:

=== Cargo.toml ===

=== src/models.rs ===

=== src/handlers.rs ===

=== src/lib.rs ===

=== src/main.rs ===

=== tests/api_test.rs ===

DOCUMENTATION — every file starts with //! one-line module doc. Structs get /// one-line doc. Zensical: say what it IS, not what it does.

RULES:

• Follow the REFERENCE IMPLEMENTATION patterns exactly
• Use axum 0.8 API: Router, Json, Path, State, StatusCode
• ROUTING: use {param} NOT :param — e.g. .route("/items/{id}", get(get_item))
• ROUTING: one .route() call per path, chain methods: .route("/items", post(create).get(list))
• State is SqlitePool wrapped in axum::extract::State
• app() takes SqlitePool as argument and calls .with_state(pool) on the Router
• Handlers return Result<(StatusCode, Json), StatusCode> or Result<StatusCode, StatusCode>
• POST returns 201 (StatusCode::CREATED), DELETE returns 204 (StatusCode::NO_CONTENT), GET missing returns 404
• CRITICAL: Use sqlx::query_as::<_, T>("SQL") runtime functions with .bind() — NEVER use sqlx::query_as!() or sqlx::query!() compile-time macros (they require DATABASE_URL at compile time)
• Use sqlx::query("SQL") for writes (DELETE, etc.), sqlx::query_as::<_, T>("SQL") for reads
• Use RETURNING clause in INSERT/UPDATE queries to get the created/updated row back
• DateTime fields: store as TEXT, use String type in Rust structs
• init_db: use .expect("msg") not Result return — keep it simple
• NO markdown fences inside file content — just raw code
• Edition 2024 in Cargo.toml
• You MUST generate ALL 6 files. Do not stop early.

TESTS — follow this exact spawn_server pattern:

async fn spawn_server() -> (reqwest::Client, String) { let pool = sqlx::sqlite::SqlitePoolOptions::new() .max_connections(1) .connect("sqlite::memory:") .await .expect("DB failed"); init_db(&pool).await; let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.expect("Bind failed"); let addr = listener.local_addr().unwrap(); let base_url = format!("http://{addr}"); let router = app(pool); tokio::spawn(async move { axum::serve(listener, router).await.unwrap() }); (reqwest::Client::new(), base_url) }

• Each #[tokio::test] calls spawn_server() to get (client, url)
• Unique descriptive data in Finnish, NOT generic "test" strings
• Use serde_json::json!() for request bodies