add test, raise original AttributeError if dataclass field not found

sphinx_automodapi/autodoc_enhancements.py

@@ -70,10 +70,17 @@ def type_object_attrgetter(obj, attr, *defargs):
 
     try:
         return getattr(obj, attr, *defargs)
-    except AttributeError:
+    except AttributeError as e:
         # for dataclasses, get the attribute from the __dataclass_fields__
         if dataclasses.is_dataclass(obj):
-            return obj.__dataclass_fields__[attr].name
+            if attr in obj.__dataclass_fields__:
+                return obj.__dataclass_fields__[attr].name
+            else:
+                # raise original AttributeError
+                raise e
+        else:
+            # raise original AttributeError
+            raise e
 
 
 def setup(app):

sphinx_automodapi/tests/test_autodoc_enhancements.py

@@ -55,3 +55,20 @@ def test_type_attrgetter():
 
     assert type_object_attrgetter(MyClass, 'susy', 'default') == 'default'
     assert type_object_attrgetter(MyClass, '__dict__') == MyClass.__dict__
+
+
+def test_type_attrgetter_for_dataclass():
+    """
+    This tests the attribute getter for non-default dataclass fields
+    """
+    import dataclasses
+
+    @dataclasses.dataclass
+    class MyDataclass:
+        foo: int
+        bar: str = "bar value"
+
+    with pytest.raises(AttributeError):
+        getattr(MyDataclass, 'foo')
+    assert type_object_attrgetter(MyDataclass, 'foo') == 'foo'
+    assert getattr(MyDataclass, 'bar') == 'bar value'