Fix side effect on updating possible array children triggering callbacks that were not updated.

CHANGELOG.md

@@ -12,6 +12,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ## Fixed
 
+- [#2429](https://github.com/plotly/dash/pull/2429) Fix side effect on updating possible array children triggering callbacks, fix [#2411](https://github.com/plotly/dash/issues/2411).
 - [#2417](https://github.com/plotly/dash/pull/2417) Disable the pytest plugin if `dash[testing]` not installed, fix [#946](https://github.com/plotly/dash/issues/946).
 - [#2417](https://github.com/plotly/dash/pull/2417) Do not swallow the original error to get the webdriver, easier to know what is wrong after updating the browser but the driver.
 - [#2425](https://github.com/plotly/dash/pull/2425) Fix multiple log handler added unconditionally to the logger, resulting in duplicate log message.

dash/dash-renderer/src/actions/dependencies_ts.ts

@@ -1,16 +1,19 @@
 import {
     all,
+    any,
     assoc,
     concat,
     difference,
     filter,
     flatten,
     forEach,
+    includes,
     isEmpty,
     keys,
     map,
     mergeWith,
     partition,
+    path,
     pickBy,
     props,
     reduce,
@@ -304,6 +307,24 @@ export const getLayoutCallbacks = (
         );
     }
 
+    if (options.filterRoot) {
+        let rootId = path(['props', 'id'], layout);
+        if (rootId) {
+            rootId = stringifyId(rootId);
+            // Filter inputs that are not present in the response
+            callbacks = callbacks.filter(cb =>
+                any(
+                    (inp: any) =>
+                        !(
+                            stringifyId(inp.id) === rootId &&
+                            !includes(inp.property, options.filterRoot)
+                        ),
+                    cb.callback.inputs
+                )
+            );
+        }
+    }
+
     /*
         Return all callbacks with an `executionGroup` to allow group-processing
     */

dash/dash-renderer/src/observers/executedCallbacks.ts

@@ -138,7 +138,8 @@ const observer: IStoreObserverDefinition<IStoreState> = {
                     const handlePaths = (
                         children: any,
                         oldChildren: any,
-                        oldChildrenPath: any[]
+                        oldChildrenPath: any[],
+                        filterRoot: any = false
                     ) => {
                         const oPaths = getState().paths;
                         const paths = computePaths(
@@ -152,7 +153,8 @@ const observer: IStoreObserverDefinition<IStoreState> = {
                         requestedCallbacks = concat(
                             requestedCallbacks,
                             getLayoutCallbacks(graphs, paths, children, {
-                                chunkPath: oldChildrenPath
+                                chunkPath: oldChildrenPath,
+                                filterRoot
                             }).map(rcb => ({
                                 ...rcb,
                                 predecessors
@@ -166,7 +168,8 @@ const observer: IStoreObserverDefinition<IStoreState> = {
                             getLayoutCallbacks(graphs, oldPaths, oldChildren, {
                                 removedArrayInputsOnly: true,
                                 newPaths: paths,
-                                chunkPath: oldChildrenPath
+                                chunkPath: oldChildrenPath,
+                                filterRoot
                             }).map(rcb => ({
                                 ...rcb,
                                 predecessors
@@ -204,7 +207,8 @@ const observer: IStoreObserverDefinition<IStoreState> = {
                                     }
                                 },
                                 oldObj,
-                                basePath
+                                basePath,
+                                keys(appliedProps)
                             );
                             // Only do it once for the component.
                             recomputed = true;

tests/integration/renderer/test_component_as_prop.py

@@ -258,3 +258,38 @@ def demo(n_clicks):
         dash_duo.wait_for_text_to_equal(f"#options label:nth-child({i}) span", "")
         dash_duo.wait_for_element(f"#options label:nth-child({i}) button").click()
         dash_duo.wait_for_text_to_equal(f"#options label:nth-child({i}) span", "1")
+
+
+def test_rdcap003_side_effect_regression(dash_duo):
+    # Test for #2411, regression introduced by original rdcap002 fix
+    # callback on the same components that is output with same id but not property triggered
+    # on cap components of array type like Checklist.options[] and  Dropdown.options[].
+    app = Dash(__name__)
+
+    app.layout = Div([Button("3<->2", id="a"), Checklist(id="b"), Div(0, id="counter")])
+
+    app.clientside_callback(
+        "function(_, prev) {return parseInt(prev) + 1}",
+        Output("counter", "children"),
+        Input("b", "value"),
+        State("counter", "children"),
+        prevent_initial_call=True,
+    )
+
+    @app.callback(Output("b", "options"), Input("a", "n_clicks"))
+    def opts(n):
+        n_out = 3 - (n or 0) % 2
+        return [str(i) for i in range(n_out)]
+
+    dash_duo.start_server(app)
+
+    dash_duo.wait_for_text_to_equal("#counter", "0")
+    dash_duo.find_element("#a").click()
+    assert len(dash_duo.find_elements("#b label > input")) == 2
+    dash_duo.wait_for_text_to_equal("#counter", "0")
+    dash_duo.find_element("#a").click()
+    assert len(dash_duo.find_elements("#b label > input")) == 3
+    dash_duo.wait_for_text_to_equal("#counter", "0")
+
+    dash_duo.find_elements("#b label > input")[0].click()
+    dash_duo.wait_for_text_to_equal("#counter", "1")