怎么修改商品限购

怎么将永久限购修改为每天只可以买一次

</Col>
          <Col span="24">
            <div class="line"></div>
          </Col>
          <Col span="24">
            <FormItem label="是否限购：">
              <i-switch v-model="formValidate.is_limit" size="large">
                <span slot="open">开启</span>
                <span slot="close">关闭</span>
              </i-switch>
            </FormItem>
          </Col>
          <Col span="24">
            <FormItem label="限购类型：" v-if="formValidate.is_limit">
              <RadioGroup v-model="formValidate.limit_type">
                <Radio :label="1">单次限购</Radio>
                <Radio :label="2">永久限购</Radio>
              </RadioGroup>
              <div class="titTip">单次限购是限制每次下单最多购买的数量，永久限购是限制一个用户总共可以购买的数量</div>
            </FormItem>
          </Col>
          <Col span="24" v-if="formValidate.is_limit">
            <FormItem label="限购数量：" prop="limit_num">
              <div class="acea-row row-middle">
                <span class="mr10"></span>
                <InputNumber placeholder="请输入限购数量" :precision="0" :min="1" v-model="formValidate.limit_num" />
                <span class="ml10"> 件 </span>
              </div>
            </FormItem>
          </Col>