vue实现评论功能，出现父子组件传值点击操作异常，无法给置顶评论点赞？

问题如下：
我插入一条新的评论为array[0]，点赞第一条置顶评论，发生变化的确是第二条，vuex变化的也是第二条

整个评论区是父组件comment-list，一条评论是子组件comment-item

下面给出父组件评论区comment-list代码：

给出子组件单条评论的comment-item代码：

<template>
  <van-cell class="comment-item">
    <van-image
      slot="icon"
      class="avatar"
      round
      fit="cover"
      :src="comment.aut_photo"
    />
    <div slot="title" class="title-wrap">
      <div class="user-name">{{ comment.aut_name }}div>
      <van-button
        class="like-btn"
        :class="{
          liked: comment.is_liking
        }"
        :icon="comment.is_liking ? 'good-job' : 'good-job-o'"
        :loading="commentLoading"
        @click="onCommentLike"
      >{{ comment.like_count || '赞' }}van-button>
    div>

    <div slot="label">
      <p class="comment-content">{{ comment.content }}p>
      <div class="bottom-info">
        <span class="comment-pubdate">{{ comment.pubdate | relativeTime }}span>
        <van-button
          class="reply-btn"
          round
          @click="$emit('reply-click', comment)"
        >回复 {{ comment.reply_count }}van-button>
      div>
    div>
  van-cell>
template>

<script>
import { addCommentLike, deleteCommentLike } from '@/api/comment'

export default {
  name: 'CommentItem',
  components: {},
  props: {
    comment: {
      type: Object,
      required: true
    }
  },
  data () {
    return {
      commentLoading: false,
      com_data: this.comment
    }
  },
  computed: {},
  watch: {},
  created () {},
  mounted () {},
  methods: {
    async onCommentLike () {
      console.log(this, '<< click action')
      this.commentLoading = true
      try {
        if (this.comment.is_liking) {
          // 已赞，取消点赞
          await deleteCommentLike(this.comment.com_id)
          this.com_data.like_count--
        } else {
          // 没有点赞，添加点赞
          await addCommentLike(this.comment.com_id)
          this.com_data.like_count++
        }
        this.com_data.is_liking = !this.com_data.is_liking
      } catch (err) {
        this.$toast('操作失败，请重试')
      }
      this.commentLoading = false
    }
  }
}
script>

<style scoped lang="less">
.comment-item {
  .avatar {
    width: 72px;
    height: 72px;
    margin-right: 25px;
  }
  .title-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    .user-name {
      color: #406599;
      font-size: 26px;
    }
  }
  .comment-content {
    font-size: 32px;
    color: #222222;
    word-break: break-all;
    text-align: justify;
  }
  .comment-pubdate {
    font-size: 19px;
    color: #222;
    margin-right: 25px;
  }
  .bottom-info {
    display: flex;
    align-items: center;
  }
  .reply-btn {
    // width: 135px;
    height: 48px;
    line-height: 48px;
    font-size: 21px;
    color: #222;
  }
  .like-btn {
    height: 30px;
    padding: 0;
    border: none;
    font-size: 19px;
    line-height: 30px;
    margin-right: 7px;
    .van-icon {
      font-size: 30px;
    }
    &.liked {
      color: #e5645f;
    }
  }
}
style>

寄，我的评论索引用的都是一个相同的index，应该区分开来，换成评论对应的com_id就解决了。