修改现金红包抽奖金额配置：

从第几次变化可以为空

src/views/finance/components/pop-add-redPack.vue

@@ -10,8 +10,12 @@
       <el-form-item label="描述" required>
         <el-input v-model="form.name"></el-input>
       </el-form-item>
-      <el-form-item label="从第几次开始变化" >
+      <el-form-item label="从第几次开始变化">
-        <el-input-number :min="0" stepstep-strictly v-model="form.num"></el-input-number>
+        <el-input-number
+          :min="0"
+          stepstep-strictly
+          v-model="form.num"
+        ></el-input-number>
       </el-form-item>
       <el-form-item label="最大金额" required>
         <el-input-number
@@ -60,7 +64,7 @@ export default {
         maxAmount: "",
         random: "",
         status: "",
-        num:''
+        num: undefined,
       },
     };
   },
@@ -72,10 +76,14 @@ export default {
       console.log(item);
       this.dialogVisible = true;
       this.item = item;
-      this.form = {
+      if (item!==undefined) {
-        ...item,
+        this.form = {
-        num: item.num || ''
+          ...item,
-      };
+          num: item.num === "" || item.num === null ? undefined : item.num,
+        };
+      }
+
+      console.log(this.form);
     },
     diaClose() {
       this.dialogVisible = false;
@@ -99,7 +107,7 @@ export default {
         return this.$message.error("概率为0-1");
       }
       const res = id
-        ? await $redPackApi.update({...this.form,num:this.form.num||''})
+        ? await $redPackApi.update({ ...this.form, num: this.form.num || "" })
         : await $redPackApi.add(this.form);
       console.log(res);
       const { data, msg } = res;