[DONE] fix for adding grid objects with quarters (#377)

CHANGES.rst

@@ -5,7 +5,7 @@ Changelog of threedigrid-builder
 1.17.1 (unreleased)
 -------------------
 
-- Nothing changed yet.
+- Fix for adding grid objects to include quarters attribute.
 
 
 1.17.0 (2024-08-16)

threedigrid_builder/base/array.py

@@ -220,6 +220,7 @@ def __add__(self, other: T) -> T:
             name: np.concatenate((getattr(self, name), getattr(other, name)))
             for name in typing.get_type_hints(self.data_class).keys()
         }
+
         for scalar_arg in self.scalars:
             new_fields[scalar_arg] = getattr(self, scalar_arg)
         return self.__class__(**new_fields)

threedigrid_builder/base/quarters.py

@@ -13,5 +13,3 @@ class Quarter:
 
 class Quarters(Array[Quarter]):
     """Calculation quarters."""
-
-    pass

threedigrid_builder/grid/grid.py

@@ -236,7 +236,7 @@ def __add__(self, other):
                 "equal types."
             )
         new_attrs = {}
-        for name in ("nodes", "lines", "nodes_embedded", "surfaces"):
+        for name in ("nodes", "lines", "nodes_embedded", "surfaces", "quarters"):
             new_attrs[name] = getattr(self, name) + getattr(other, name)
         for name in (
             "meta",