backend 409 on document conflict

backend/src/error.rs

@@ -4,6 +4,7 @@ use axum::{
     Json,
 };
 use serde::Serialize;
+use serde_json::Value;
 use std::fmt::Display;
 
 pub type AppResult<T> = Result<T, AppError>;
@@ -13,6 +14,7 @@ pub struct AppError {
     status: StatusCode,
     message: String,
     code: Option<String>,
+    details: Option<Value>,
 }
 
 impl AppError {
@@ -21,6 +23,7 @@ impl AppError {
             status,
             message: message.into(),
             code: None,
+            details: None,
         }
     }
 
@@ -48,6 +51,11 @@ impl AppError {
         self.code = Some(code.into());
         self
     }
+
+    pub fn with_details(mut self, details: Value) -> Self {
+        self.details = Some(details);
+        self
+    }
 }
 
 impl IntoResponse for AppError {
@@ -56,6 +64,7 @@ impl IntoResponse for AppError {
         let body = Json(ErrorResponse {
             error: self.message,
             code: self.code,
+            details: self.details,
         });
         (status, body).into_response()
     }
@@ -66,6 +75,8 @@ struct ErrorResponse {
     error: String,
     #[serde(skip_serializing_if = "Option::is_none")]
     code: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    details: Option<Value>,
 }
 
 impl From<diesel::result::Error> for AppError {