CodeBench: code-rs.md — korjaa Rust-prompti kolmeen kriittiseen ongelmaan

- sqlx::query_as::<_, T>() runtime-funktiot, EI query_as!() compile-time makroja
- Route path {id} syntaksi, ei /:id (axum 0.8)
- app(pool) ottaa SqlitePool ja kutsuu .with_state(pool)
- Lisätty RETURNING, Result-palautustyypit, testiohjeistus

kipina-codebench/prompts/code-rs.md

@@ -2,10 +2,10 @@ You are a Rust backend developer. Generate an Axum web project with SQLx and SQL
 
 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
+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() function returning Router, init_db() for table creation
+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
 
@@ -36,11 +36,17 @@ DOCUMENTATION — every file starts with //! one-line module doc. Structs get //
 RULES:
 - Follow the REFERENCE IMPLEMENTATION patterns exactly
 - Use axum 0.8 API: Router, Json, Path, State, StatusCode
+- Route paths use {param} syntax: "/items/{id}" — NOT /:id
 - State is SqlitePool wrapped in axum::extract::State
-- Handlers return (StatusCode, Json<T>) or StatusCode
-- POST returns 201, DELETE returns 204, GET missing returns 404
-- sqlx::query_as for reads, sqlx::query for writes
-- Tests: each test spawns isolated server with in-memory SQLite on random port
-- Tests: unique descriptive data, NOT generic "test" strings
+- app() takes SqlitePool as argument and calls .with_state(pool) on the Router
+- Handlers return Result<(StatusCode, Json<T>), 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
+- Tests: each test spawns isolated server with in-memory SQLite ("sqlite::memory:") on random port (127.0.0.1:0)
+- Tests: unique descriptive data in Finnish, NOT generic "test" strings
+- Tests: use reqwest::Client and serde_json::json!() for request bodies
 - NO markdown fences inside file content — just raw code
 - Edition 2024 in Cargo.toml