0.4.1 - change update_data_by_route

Change the behavior of `DashJsonGrid.update_data_by_route(...)`. When a column is specified, a length-one sequence is provided, and the number available items of the column is also one, will broadcast the one available value rather than broadcasting all the sequence item to all columns.

Author: cainmagi

Changelog.md

@@ -10,6 +10,10 @@
 
 1. Fix: Update the docstring of the component and the typehint `ThemeConfigs` to the newest version.
 
+#### :floppy_disk: Change
+
+1. Change the behavior of `DashJsonGrid.update_data_by_route(...)`. When a column is specified, a length-one sequence is provided, and the number available items of the column is also one, will broadcast the one available value rather than broadcasting all the sequence item to all columns.
+
 ### 0.4.0 @ 10/21/2024
 
 #### :mega: New

dash_json_grid/mixins.py

@@ -138,19 +138,24 @@ def _broadcast_sequence(data: Sequence[Any], index_key: str, value: Sequence[Any
         `[{"key": val1, ...}, {"key": val2, ...}, ...]`
         and `value` is a sequence, broadcast `value` items to each mapping-like item
         of `data`."""
-        sub_data = tuple(
+        _sub_data = tuple(
             ditem for ditem in data if isinstance(ditem, collections.abc.MutableMapping)
         )
-        n_data = len(sub_data)
+        n_data = len(_sub_data)
         if n_data == len(value):
-            for item, vitem in zip(sub_data, value):
+            for item, vitem in zip(_sub_data, value):
                 item[index_key] = vitem
             return
-        sub_data = tuple(ditem for ditem in sub_data if index_key in ditem)
+        sub_data = tuple(ditem for ditem in _sub_data if index_key in ditem)
         if len(sub_data) == len(value):
             for item, vitem in zip(sub_data, value):
                 item[index_key] = vitem
             return
+        elif n_data > 1 and len(value) == 1:
+            vitem = value[0]
+            for item in _sub_data:
+                item[index_key] = vitem
+            return
         raise IndexError(
             "The current index {0} locates a table column. However, "
             'the provided argument "val" does not match the length of '
@@ -175,11 +180,8 @@ def _set_by_broadcast(data: Sequence[Any], index_key: str, value: Any):
                     data[key][index_key] = val
                 return
             _set_item_of_object._broadcast_scalar(data, index_key, value)
-        elif len(value) > 1:
+        elif len(value) > 0:
             _set_item_of_object._broadcast_sequence(data, index_key, value)
-        elif len(value) == 1:
-            vitem = value[0]
-            _set_item_of_object._broadcast_scalar(data, index_key, vitem)
         else:
             raise ValueError('The provided argument "value" is empty.')
 

tests/test_table_columns.py

@@ -137,7 +137,7 @@ def test_table_columns_incomplete_cols(self, data: Any) -> None:
         data_deleted = dash_json_grid.DashJsonGrid.delete_data_by_route(
             test_data, [["key3"]]
         )
-        assert utils.is_eq_mapping(data_deleted, {3: 4.0})
+        assert utils.is_eq_mapping(data_deleted, {3: ref_data[3]["key3"]})
         assert all("key3" not in ditem for ditem in test_data)
         assert not all("key3" not in ditem for ditem in ref_data)
         log.info(
@@ -155,6 +155,16 @@ def test_table_columns_incomplete_cols(self, data: Any) -> None:
             "{0}".format(data_deleted)
         )
 
+        dash_json_grid.DashJsonGrid.update_data_by_route(test_data, [["key3"]], (5.0,))
+        data_routed = dash_json_grid.DashJsonGrid.get_data_by_route(
+            test_data, [["key3"]]
+        )
+        assert utils.is_eq(data_routed, {3: 5.0})
+        log.info(
+            "Successfully update a column with one value. The value is: "
+            "{0}".format(data_routed)
+        )
+
         dash_json_grid.DashJsonGrid.update_data_by_route(
             test_data, [["key2"]], "NEWDATA"
         )