handle case of empty cached slice values

kecnry · May 28, 2024 · 11d4f70 · 11d4f70
1 parent af6966b
commit 11d4f70
Show file tree

Hide file tree

Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/jdaviz/configs/cubeviz/plugins/slice/slice.py b/jdaviz/configs/cubeviz/plugins/slice/slice.py
@@ -125,6 +125,9 @@ def _initialize_location(self, *args):
             if str(viewer.state.x_att) not in self.valid_slice_att_names:
                 # avoid setting value to degs, before x_att is changed to wavelength, for example
                 continue
+            # ensure the cache is reset (if previous attempts to initialize failed resulting in an
+            # empty list as the cache)
+            viewer._clear_cache('slice_values')
             slice_values = viewer.slice_values
             if len(slice_values):
                 self.value = slice_values[int(len(slice_values)/2)]

diff --git a/jdaviz/configs/cubeviz/plugins/viewers.py b/jdaviz/configs/cubeviz/plugins/viewers.py
@@ -60,6 +60,7 @@ def _get_component(layer):
             return np.asarray(np.unique(np.concatenate([_get_component(layer) for layer in self.layers])),  # noqa
                               dtype=float)
         except ValueError:
+            # NOTE: this will result in caching an empty list
             return np.array([])
 
     def _set_slice_indicator_value(self, value):