怎么將永久限購修改為每天只可以買一次

</Col>
          <Col span="24">
            <div class="line"></div>
          </Col>
          <Col span="24">
            <FormItem label="是否限購：">
              <i-switch v-model="formValidate.is_limit" size="large">
                <span slot="open">開啟</span>
                <span slot="close">關(guān)閉</span>
              </i-switch>
            </FormItem>
          </Col>
          <Col span="24">
            <FormItem label="限購類型：" v-if="formValidate.is_limit">
              <RadioGroup v-model="formValidate.limit_type">
                <Radio :label="1">單次限購</Radio>
                <Radio :label="2">永久限購</Radio>
              </RadioGroup>
              <div class="titTip">單次限購是限制每次下單最多購買的數(shù)量，永久限購是限制一個(gè)用戶總共可以購買的數(shù)量</div>
            </FormItem>
          </Col>
          <Col span="24" v-if="formValidate.is_limit">
            <FormItem label="限購數(shù)量：" prop="limit_num">
              <div class="acea-row row-middle">
                <span class="mr10"></span>
                <InputNumber placeholder="請輸入限購數(shù)量" :precision="0" :min="1" v-model="formValidate.limit_num" />
                <span class="ml10"> 件 </span>
              </div>
            </FormItem>
          </Col>