more fixes

server/tests/table_definition/post_table_definition_test2.rs

@@ -246,26 +246,44 @@ async fn test_nullable_and_multiple_links(#[future] pool_with_preexisting_table:
 // 8) Duplicate links in one request → Internal.
 #[rstest]
 #[tokio::test]
-async fn test_fail_on_duplicate_links(#[future] pool_with_preexisting_table: PgPool) {
-    let pool = pool_with_preexisting_table.await;
+async fn test_fail_on_duplicate_links(#[future] pool: PgPool) {
+    let pool = pool.await;
+    let unique_id = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap()
+        .as_nanos();
+    let customers_table = format!("customers_{}", unique_id);
+
+    // Create the prerequisite table
+    let prereq_req = PostTableDefinitionRequest {
+        profile_name: "default".into(),
+        table_name: customers_table.clone(),
+        columns: vec![],
+        links: vec![],
+        indexes: vec![],
+    };
+    post_table_definition(&pool, prereq_req).await.expect("Failed to create prerequisite table");
+
+    // Now, test the duplicate link scenario
     let req = PostTableDefinitionRequest {
         profile_name: "default".into(),
-        table_name: "dup_links".into(),
+        table_name: format!("dup_links_{}", unique_id),
         columns: vec![],
         indexes: vec![],
         links: vec![
             TableLink {
-                linked_table_name: "customers".into(),
+                linked_table_name: customers_table.clone(),
                 required: true,
             },
             TableLink {
-                linked_table_name: "customers".into(),
+                linked_table_name: customers_table.clone(),
                 required: false,
             },
         ],
     };
     let err = post_table_definition(&pool, req).await.unwrap_err();
-    assert_eq!(err.code(), Code::Internal);
+    assert_eq!(err.code(), Code::InvalidArgument);
+    assert!(err.message().contains(&format!("Duplicate link to table '{}'", customers_table)));
 }
 
 // 9) Self‐referential FK: link child back to same‐profile parent.