element 多选框赋值

<el-row class="inputCenter">
                    <el-col :span="20">
                      <el-form-item :label="$t('member.MemberProfile.lang_memberprofile_155')" prop="activity">
                        <el-select v-model="memberProfile.activity" multiple placeholder="请选择">
                          <el-option v-for="item in getActivityCodeData.list" :key="item.itemValueCode" :label="item.itemValueName" :value="item.itemValueCode">
                          </el-option>
                        </el-select>
                      </el-form-item>
                    </el-col>
                  </el-row>


this.salesInfoData.SALE_ACTIVITY_CODE.forEach((element: any) => {
      this.memberProfile.activity.push(element.salesInfoCode)
    });