问题描述：
 当页面搜索条件只有一个的情况下，输入框不管有没有值，回车后会跳转页面

解决办法，给表单添加  @submit.prevent

      <el-form ref="ruleForm" :model="search" label-width="120px" class="form-class" @submit.prevent><el-row><el-col :span="6"><el-form-item :label="$t('包装编码:')" prop=""><el-input v-model="search.packingCode" class="input_class" /></el-form-item></el-col><el-col :span="18" class="btn_class"><el-button style="margin-left: 10px" type="primary" icon="search" @click="fniSearchTable">{{ '查询' }}</el-button><el-button icon="refresh" type="primary" @click="handleResetSearch">{{ '重置' }}</el-button></el-col></el-row></el-form>