allows to bubble up exceptions when standalone resource returns

dlt/extract/decorators.py

@@ -567,16 +567,13 @@ def _wrap(*args: Any, **kwargs: Any) -> TDltResourceImpl:
                     compat_wrapper(actual_resource_name, conf_f, sig, *args, **kwargs),
                     incremental,
                 )
-            except InvalidResourceDataTypeFunctionNotAGenerator as gen_ex:
+            except InvalidResourceDataTypeFunctionNotAGenerator:
                 # we allow an edge case: resource can return another resource
-                try:
-                    # actually call the function to see if it contains DltResource
-                    data_ = conf_f(*args, **kwargs)
-                    if not isinstance(data_, DltResource):
-                        raise
-                    r = data_  # type: ignore[assignment]
-                except Exception:
-                    raise gen_ex from None
+                # actually call the function to see if it contains DltResource
+                data_ = conf_f(*args, **kwargs)
+                if not isinstance(data_, DltResource):
+                    raise
+                r = data_  # type: ignore[assignment]
             # consider transformer arguments bound
             r._args_bound = True
             # keep explicit args passed

tests/extract/test_decorators.py

@@ -880,6 +880,17 @@ def rv_resource(name: str):
     assert list(r) == [1, 2, 3]
 
 
+def test_standalone_resource_returning_resource_exception() -> None:
+    @dlt.resource(standalone=True)
+    def rv_resource(uniq_name: str = dlt.config.value):
+        return dlt.resource([1, 2, 3], name=uniq_name, primary_key="value")
+
+    # pass through of the exception in `rv_resource` when it returns, not yields
+    with pytest.raises(ConfigFieldMissingException) as conf_ex:
+        rv_resource()
+    assert conf_ex.value.fields == ["uniq_name"]
+
+
 def test_resource_rename_credentials_separation():
     os.environ["SOURCES__TEST_DECORATORS__STANDALONE_SIGNATURE__SECRET_END"] = "5"
     assert list(standalone_signature(1)) == [1, 2, 3, 4]