feat： 增加案例流程，业务表单发起时选择审批人

src/views/bpm/oa/leave/create.vue

 <template>
-  <el-row :gutter="20">
-    <el-col :span="16"
-      ><el-form
-        ref="formRef"
-        v-loading="formLoading"
-        :model="formData"
-        :rules="formRules"
-        label-width="80px"
-      >
-        <el-form-item label="请假类型" prop="type">
-          <el-select v-model="formData.type" clearable placeholder="请选择请假类型">
-            <el-option
-              v-for="dict in getIntDictOptions(DICT_TYPE.BPM_OA_LEAVE_TYPE)"
-              :key="dict.value"
-              :label="dict.label"
-              :value="dict.value"
+  <ContentWrap :bodyStyle="{ padding: '10px 20px 0' }">
+    <el-row :gutter="20">
+      <el-col :span="16"
+        ><el-form
+          ref="formRef"
+          v-loading="formLoading"
+          :model="formData"
+          :rules="formRules"
+          label-width="80px"
+        >
+          <el-form-item label="请假类型" prop="type">
+            <el-select v-model="formData.type" clearable placeholder="请选择请假类型">
+              <el-option
+                v-for="dict in getIntDictOptions(DICT_TYPE.BPM_OA_LEAVE_TYPE)"
+                :key="dict.value"
+                :label="dict.label"
+                :value="dict.value"
+              />
+            </el-select>
+          </el-form-item>
+          <el-form-item label="开始时间" prop="startTime">
+            <el-date-picker
+              v-model="formData.startTime"
+              clearable
+              placeholder="请选择开始时间"
+              type="datetime"
+              value-format="x"
+            />
+          </el-form-item>
+          <el-form-item label="结束时间" prop="endTime">
+            <el-date-picker
+              v-model="formData.endTime"
+              clearable
+              placeholder="请选择结束时间"
+              type="datetime"
+              value-format="x"
             />
-          </el-select>
-        </el-form-item>
-        <el-form-item label="开始时间" prop="startTime">
-          <el-date-picker
-            v-model="formData.startTime"
-            clearable
-            placeholder="请选择开始时间"
-            type="datetime"
-            value-format="x"
-          />
-        </el-form-item>
-        <el-form-item label="结束时间" prop="endTime">
-          <el-date-picker
-            v-model="formData.endTime"
-            clearable
-            placeholder="请选择结束时间"
-            type="datetime"
-            value-format="x"
-          />
-        </el-form-item>
-        <el-form-item label="原因" prop="reason">
-          <el-input v-model="formData.reason" placeholder="请输入请假原因" type="textarea" />
-        </el-form-item>
-        <el-form-item>
-          <el-button :disabled="formLoading" type="primary" @click="submitForm">确 定</el-button>
-        </el-form-item>
-      </el-form></el-col
-    >
-    <el-col :span="8"
-      ><!-- 流程时间线 -->
-      <ProcessInstanceTimeline
-        ref="timelineRef"
-        :activity-nodes="activityNodes"
-        :show-status-icon="false"
-        @select-user-confirm="selectUserConfirm"
-      />
-    </el-col>
-  </el-row>
+          </el-form-item>
+          <el-form-item label="原因" prop="reason">
+            <el-input v-model="formData.reason" placeholder="请输入请假原因" type="textarea" />
+          </el-form-item>
+          <el-form-item>
+            <el-button :disabled="formLoading" type="primary" @click="submitForm">确 定</el-button>
+          </el-form-item>
+        </el-form></el-col
+      >
+      <!-- 新增    ====== begin ======== -->
+      <el-col :span="8"
+        ><!-- 流程时间线 -->
+        <ProcessInstanceTimeline
+          ref="timelineRef"
+          :activity-nodes="activityNodes"
+          :show-status-icon="false"
+          @select-user-confirm="selectUserConfirm"
+        />
+      </el-col>
+      <!-- 新增    ====== end ======== -->
+    </el-row>
+  </ContentWrap>
 </template>
 <script lang="ts" setup>
 import { DICT_TYPE, getIntDictOptions } from '@/utils/dict'
 import * as LeaveApi from '@/api/bpm/leave'
 import { useTagsViewStore } from '@/store/modules/tagsView'
 import * as DefinitionApi from '@/api/bpm/definition'
+//  新增    ====== begin ========
 import ProcessInstanceTimeline from '../../processInstance/detail/ProcessInstanceTimeline.vue'
 import * as ProcessInstanceApi from '@/api/bpm/processInstance'
 import { CandidateStrategy, NodeId } from '@/components/SimpleProcessDesignerV2/src/consts'
 import { ApprovalNodeInfo } from '@/api/bpm/processInstance'
-
+//  新增    ====== end ========
 defineOptions({ name: 'BpmOALeaveCreate' })
 
 const message = useMessage() // 消息弹窗
@@ -90,10 +95,11 @@ const formRef = ref() // 表单 Ref
 const processDefineKey = 'oa_leave' // 流程定义 Key
 const startUserSelectTasks = ref([]) // 发起人需要选择审批人的用户任务列表
 const startUserSelectAssignees = ref({}) // 发起人选择审批人的数据
+//  新增    ====== begin ========
 const tempStartUserSelectAssignees = ref({}) // 历史发起人选择审批人的数据，用于每次表单变更时，临时保存
 const activityNodes = ref<ProcessInstanceApi.ApprovalNodeInfo[]>([]) // 审批节点信息
 const processDefinitionId = ref('')
-
+//  新增    ====== end ========
 /** 提交表单 */
 const submitForm = async () => {
   // 校验表单
@@ -130,32 +136,14 @@ const submitForm = async () => {
   }
 }
 
-/** 预测流程节点会因为输入的参数值而产生新的预测结果值，所以需重新预测一次 */
-watch(
-  formData.value,
-  (newValue) => {
-    // if (newValue && Object.keys(newValue.value).length > 0) {
-    //   // 记录之前的节点审批人
-    //   tempStartUserSelectAssignees.value = startUserSelectAssignees.value
-    //   startUserSelectAssignees.value = {}
-    //   // 加载最新的审批详情
-    //   getApprovalDetail({
-    //     id: processDefinitionId,
-    //     processVariablesStr: JSON.stringify(newValue.value) // 解决 GET 无法传递对象的问题，后端 String 再转 JSON
-    //   })
-    // }
-  },
-  {
-    immediate: true
-  }
-)
-
+//  新增    ====== begin ========
 /** 获取审批详情 */
 const getApprovalDetail = async (row: any) => {
   try {
     const data = await ProcessInstanceApi.getApprovalDetail({
       processDefinitionId: row.id,
-      activityId: NodeId.START_USER_NODE_ID
+      activityId: NodeId.START_USER_NODE_ID,
+      processVariablesStr: row.processVariablesStr // 解决 GET 无法传递对象的问题，后端 String 再转 JSON
     })
 
     if (!data) {
@@ -190,6 +178,7 @@ const getApprovalDetail = async (row: any) => {
 const selectUserConfirm = (id: string, userList: any[]) => {
   startUserSelectAssignees.value[id] = userList?.map((item: any) => item.id)
 }
+//  新增    ====== end ========
 
 /** 初始化 */
 onMounted(async () => {
@@ -204,6 +193,36 @@ onMounted(async () => {
   }
   processDefinitionId.value = processDefinitionDetail.id
   startUserSelectTasks.value = processDefinitionDetail.startUserSelectTasks
-  getApprovalDetail({ id: processDefinitionId.value, processVariablesStr:  JSON.stringify(formData.value)  })
+  //  新增    ====== begin ========
+  // 查询流程预测节点
+  getApprovalDetail({
+    id: processDefinitionId.value,
+    processVariablesStr: JSON.stringify(formData.value)
+  })
+  //  新增    ====== end ========
 })
+//  新增    ====== begin ========
+/** 预测流程节点会因为输入的参数值而产生新的预测结果值，所以需重新预测一次 */
+watch(
+  formData.value,
+  (newValue, oldValue) => {
+    if (!oldValue) {
+      return
+    }
+    if (newValue && Object.keys(newValue).length > 0) {
+      // 记录之前的节点审批人
+      tempStartUserSelectAssignees.value = startUserSelectAssignees.value
+      startUserSelectAssignees.value = {}
+      // 加载最新的审批详情
+      getApprovalDetail({
+        id: processDefinitionId.value,
+        processVariablesStr: JSON.stringify(newValue) // 解决 GET 无法传递对象的问题，后端 String 再转 JSON
+      })
+    }
+  },
+  {
+    immediate: true
+  }
+  //  新增    ====== end ========
+)
 </script>