fix: make rawChildErrors reactive in vue-vuetify

Fixes #2559

Author: sdirix

packages/vue-vuetify/src/util/composition.ts

@@ -479,6 +479,8 @@ export const useVuetifyArrayControl = <
     };
   });
 
+  const rawChildErrors = computed(() => input.control.value.childErrors);
+
   return {
     ...input,
     control: overwrittenControl,
@@ -487,7 +489,7 @@ export const useVuetifyArrayControl = <
     childLabelForIndex,
     computedLabel,
     vuetifyProps,
-    rawChildErrors: input.control.value.childErrors,
+    rawChildErrors,
   };
 };
 

packages/vue-vuetify/tests/unit/util/composition.spec.ts

@@ -0,0 +1,68 @@
+import { describe, it, expect } from 'vitest';
+import type { ErrorObject } from 'ajv';
+import { computed, defineComponent, h, nextTick, provide, ref } from 'vue';
+import { mount } from '@vue/test-utils';
+import { useVuetifyArrayControl } from '../../../src/util/composition';
+
+const makeError = (instancePath: string): ErrorObject => ({
+  keyword: 'required',
+  message: 'is required',
+  instancePath,
+  schemaPath: '#/required',
+  params: {},
+});
+
+describe('useVuetifyArrayControl', () => {
+  it('exposes a reactive rawChildErrors that reflects child error changes', async () => {
+    const childErrors = ref<ErrorObject[]>([]);
+
+    let captured: ReturnType<typeof useVuetifyArrayControl> | undefined;
+
+    const Child = defineComponent({
+      setup() {
+        const control = computed(() => ({
+          label: '',
+          required: false,
+          config: {},
+          uischema: { type: 'Control', scope: '#' },
+          schema: { type: 'array' },
+          data: [],
+          childErrors: childErrors.value,
+          i18nKeyPrefix: '',
+        }));
+        captured = useVuetifyArrayControl({ control });
+        return () => h('div');
+      },
+    });
+
+    const Host = defineComponent({
+      components: { Child },
+      setup() {
+        provide('jsonforms', {
+          core: { data: {}, schema: {}, uischema: { type: 'Control' } },
+          i18n: {
+            translate: (_id: string, defaultMessage?: string) => defaultMessage,
+          },
+        });
+        return () => h(Child);
+      },
+    });
+
+    mount(Host);
+
+    expect(captured).toBeDefined();
+    expect(captured!.rawChildErrors.value).toEqual([]);
+
+    const next = [makeError('/0/name')];
+    childErrors.value = next;
+    await nextTick();
+
+    expect(captured!.rawChildErrors.value).toEqual(next);
+
+    const updated = [makeError('/0/name'), makeError('/1/name')];
+    childErrors.value = updated;
+    await nextTick();
+
+    expect(captured!.rawChildErrors.value).toEqual(updated);
+  });
+});