vue-element的select下拉框赋值

<template>
  <el-select v-model="value" placeholder="请选择">
    <el-option
      v-for="item in options"
      :key="item.value"
      :label="item.label"
      :value="item.value">
    </el-option>
  </el-select>
</template>
<script>
  export default {
    data() {
      return {
        options: [{
          value: '选项1',
          label: '黄金糕'
        }, {
          value: '选项2',
          label: '双皮奶'
        }, {
          value: '选项3',
          label: '蚵仔煎'
        }, {
          value: '选项4',
          label: '龙须面'
        }, {
          value: '选项5',
          label: '北京烤鸭'
        }],
        value: ''
      }
    }
  }
</script>

<template>
  <el-select v-model="value" placeholder="请选择">
    <el-option
      v-for="item in options"
      :key="item"
      :value="item">
    </el-option>
  </el-select>
</template>
<script>
  export default {
    data() {
      return {
        options: [
          '黄金',
          '白银',
          '铂金',
          '钻石',
        ],
        value: ''
      }
    }
  }
</script>

<el-form-item label="商品种类" class="FormInputClass">
  <el-select v-model="adminSaveParam.prodClass" clearable placeholder="请选择" size="mini" class="formInput" @change="selectChange">
    <el-option
      v-for="item in prodClass"
      :key="item.value"
      :label="item.label"
      :value="item.value">
    </el-option>
  </el-select>
</el-form-item>

if (supplier.isVmi === "Y") {
              this.adminSaveParam.prodClass = "VMI";
            } else if (supplier.isVmi === "N") {
              this.adminSaveParam.prodClass = "physical";
            }
          }

 selectChange(){
    this.$forceUpdate()
  },