fix(batch-add-formitem):fix the form not working when setFieldsValue through form-groups and add a demo with form groups (#3765)

* fix(util): 修复form表单批量添加的时候用setFieldsValue和model设置不生效的问题

* feat(demo): 为表单组增删添加表单组增删的demo与给出表单组赋值修复后setFieldsValue的示例

src/components/Form/src/hooks/useFormEvents.ts

@@ -163,7 +163,7 @@ export function useFormEvents({
       } else {
         nestKeyArray.forEach((nestKey: string) => {
           try {
-            const value = nestKey.split('.').reduce((out, item) => out[item], values);
+            const value = get(values,nestKey)
             if (isDef(value)) {
               unref(formModel)[nestKey] = unref(value);
               validKeys.push(nestKey);

src/views/demo/form/AppendForm.vue

@@ -1,6 +1,6 @@
 <template>
   <PageWrapper title="表单增删示例">
-    <CollapseContainer title="表单增删">
+    <CollapseContainer title="表单项增删">
       <BasicForm @register="register" @submit="handleSubmit">
         <template #add="{ field }">
           <a-button v-if="Number(field) === 0" @click="add">+</a-button>
@@ -11,6 +11,15 @@
         </template>
       </BasicForm>
     </CollapseContainer>
+    <CollapseContainer title="表单组增删" class="my-3">
+      <a-button @click="setGroup">设置初始值</a-button>
+      <a-button class="m-2"  @click="addGroup">
+            批量添加表单
+      </a-button>
+      <a-button @click="delGroup">批量减少表单</a-button>
+      <BasicForm @register="registerGroup" @submit="handleSubmitGroup">
+      </BasicForm>
+    </CollapseContainer>
   </PageWrapper>
 </template>
 <script lang="ts" setup>
@@ -18,7 +27,10 @@
   import { BasicForm, useForm } from '@/components/Form';
   import { CollapseContainer } from '@/components/Container';
   import { PageWrapper } from '@/components/Page';
-
+  
+  import { useMessage } from '@/hooks/web/useMessage';
+  const { createMessage } = useMessage();
+  const count = ref(0);
   const [register, { appendSchemaByField, removeSchemaByField, validate }] = useForm({
     schemas: [
       {
@@ -48,6 +60,7 @@
   async function handleSubmit() {
     try {
       const data = await validate();
+      createMessage.success("请前往控制台查看输出")
       console.log(data);
     } catch (e) {
       console.log(e);
@@ -121,4 +134,64 @@
     removeSchemaByField([`field${field}a`, `field${field}b`, `${field}`]);
     n.value--;
   }
+  const [
+    registerGroup,
+    { appendSchemaByField: appendSchemaByFieldGroup,  removeSchemaByField:removeSchemaByFieldGroup, getFieldsValue:getFieldsValueGroup,setFieldsValue },
+  ] = useForm({
+    schemas: [
+      {
+        field: `field[${count.value}].a`,
+        component: 'Input',
+        label: '字段a',
+        colProps:{span:9},
+       
+      },
+      {
+        field: `field[${count.value}].b`,
+        colProps:{span:9},
+        component: 'Input',
+        label: '字段b',
+      },
+     
+    ],
+    labelWidth: 100,
+    actionColOptions: { span: 24 },
+    baseColProps: { span: 8 },
+  });
+
+  function addGroup() {
+    count.value++;
+    appendSchemaByFieldGroup([ {
+        field: `field[${count.value}].a`,
+        component: 'Input',
+        colProps:{span:9},
+        label: '字段a',
+      },
+      {
+        field: `field[${count.value}].b`,
+        component: 'Input',
+        colProps:{span:9},
+        label: '字段b',
+      },
+    ],"")
+  }
+
+  function delGroup() {
+    removeSchemaByFieldGroup([`field[${count.value}].a`, `field[${count.value}].b`]);
+    count.value--;
+  }
+
+  function setGroup(){
+    setFieldsValue({
+      field:[{
+        a:"默认a",
+        b:"默认b"
+      }]
+    })
+  }
+
+  function handleSubmitGroup(){
+    createMessage.success("请前往控制台查看输出")
+    console.log(getFieldsValueGroup())
+  }
 </script>