Fixes

Cargo.lock

@@ -180,6 +180,7 @@ dependencies = [
  "itoa",
  "pq-sys",
  "r2d2",
+ "serde_json",
 ]
 
 [[package]]
@@ -425,9 +426,9 @@ checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8402cab7aefae129c6977bb0ff1b8fd9a04eb5b51efc50a70bea51cda0c7924"
+checksum = "b3b1c9bd4fe1f0f8b387f6eb9eb3b4a1aa26185e5750efb9140301703f62cd1b"
 dependencies = [
  "adler2",
 ]
@@ -662,9 +663,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.13.2"
+version = "1.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
+checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
 
 [[package]]
 name = "socket2"

Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 anyhow = "1.0.95"
 async-trait = "0.1.86"
 axum = { version = "0.8.1", features = ["json"] }
-diesel = { version = "2.2.7", features = ["postgres", "r2d2"] }
+diesel = { version = "2.2.7", features = ["postgres", "r2d2", "serde_json"] }
 dotenvy = "0.15.7"
 r2d2 = "0.8.10"
 serde = { version = "1.0.217", features = ["derive"] }

src/base/controller.rs

@@ -26,8 +26,8 @@ where
         }
     }
 
-    pub async fn get_all(&self) -> Result<impl IntoResponse> {
-        let entities = self.service.get_all().await?;
+    pub async fn get_all(&self) -> Result<impl IntoResponse, String> {
+        let entities = self.service.get_all().await.map_err(|err| err.to_string())?;
         Ok((StatusCode::OK, Json(entities)))
     }
 }

src/base/entity.rs

@@ -1,4 +1,3 @@
-use diesel::prelude::*;
 use serde::{Deserialize, Serialize};
 
 pub trait BaseEntity {

src/main.rs

@@ -18,8 +18,7 @@ async fn main() {
     let user_controller = Arc::new(UserController::new(user_service));
 
     let app = Router::new()
-        .merge(UserController::routes())
-        .with_state(user_controller);
+        .merge(UserController::routes(user_controller.clone()));
 
     let listener = TcpListener::bind("0.0.0.0:3000").await.unwrap();
     serve(listener, app).await.unwrap();

src/routes/user/controller.rs

@@ -1,4 +1,8 @@
-use axum::Router;
+use std::sync::Arc;
+
+use axum::extract::State;
+use axum::http::StatusCode;
+use axum::{Json, Router};
 use axum::routing::get;
 use crate::base::controller::BaseController;
 
@@ -16,14 +20,24 @@ impl UserController {
         }
     }
 
-    pub fn routes() -> Router {
+    pub fn routes(state: Arc<UserController>) -> Router {
         Router::new()
             .route("/users", get(Self::get_users))
+            .with_state(state)
     }
 
     async fn get_users(
         State(controller): State<Arc<UserController>>,
-    ) -> impl IntoResponse {
-        controller.base_controller.get_all().await
+    ) -> Result<Json<Vec<User>>, (StatusCode, Json<String>)> {
+        match controller.base_controller.get_all().await {
+            Ok(users) => {
+                // Wrap the users in Json, which implements IntoResponse
+                Ok(Json(users))
+            }
+            Err(err) => {
+                // In case of error, return StatusCode with Json error message
+                Err((StatusCode::INTERNAL_SERVER_ERROR, Json(err.to_string())))
+            }
+        }
     }
 }

src/routes/user/model.rs

@@ -4,7 +4,7 @@ use crate::base::entity::BaseEntity;
 use super::schema::users;
 
 #[derive(Debug, Clone, Serialize, Deserialize, Queryable, Identifiable)]
-#[diesel(table_name = users)]
+#[diesel(table_name = users, primary_key(id))]
 pub struct User {
     pub id: i32,
     pub name: String,
@@ -16,3 +16,11 @@ impl BaseEntity for User {
         self.id
     }
 }
+
+impl Identifiable for User {
+    type Id = i32;
+
+    fn id(self) -> Self::Id {
+        self.id
+    }
+}

src/routes/user/schema.rs

@@ -1,6 +1,8 @@
-diesel::table! {
+use diesel::table;
+
+table! {
     users (id) {
-        id -> Int4,
+        id -> Integer,
         name -> Varchar,
         email -> Varchar,
     }