Vue.js 数组在变异更新后消失

Question

我的项目有问题。该项目就像计算器。 Question/Answer。当我点击向上或向下按钮说这个解决方案有用与否时，它会发送到后端以增加并发回更新的所有解决方案。目前一切正常。但是在我更新突变的解决方案之后，解决方案消失了但它更新了数组。它适用于问题部分。 v-for 不用于问题部分。我认为 v-for 和 v-if 可能会导致问题。好的，这是代码：

HTML

<b-card
          no-body
          v-for="(solution, index) in solutionsOfProblem"
          :key="index"
        >
   <div v-if="solutionsOfProblem.length > 0">
            <b-card-body id="problem-detail-body">
              <div id="problem-detail-body-top">
                <div id="problem-detail-body-top-left">
                  <button
                    @click="upSolution(solution._id)"
                    id="up-down-buttons"
                  >
                    <b-icon-exclamation-circle-fill
                      id="up-icon"
                      variant="danger"
                      class="h2 mb-2"
                    ></b-icon-exclamation-circle-fill>
...
...

script.js

computed: {
    user() {
      return this.$store.state.user.user;
    },
    solutionToSend() {
      return this.$store.state.solutions.solutionToSend;
    },
    solutionsOfProblem() { // this shows the array of solutions
      return this.$store.state.solutions.solutionsOfProblem
    },
methods: {
upSolution(solution) { // this one trigger the action to make a post request to database
      if (this.user.name) {
        this.voteSolution.solutionId = solution
        this.voteSolution.isUpped = true
        this.$store.dispatch('solutions/voteSolutionFromDatabase', this.voteSolution)
      } else {
        this.$bvToast.toast('You need to login to vote!', {
          title: 'Error',
          autoHideDelay: 4000,
          variant: 'danger'
        })
      }
    },
}

突变

const solutionVoted = (state, solution) => {
  state.solutionsOfProblem = solution
}

状态

solutionsOfProblem: [],

actions.js - 我从数据库中获取数组

const voteSolutionFromDatabase = ({ commit }, vote) => {
  axios({
    method: 'post',
    url: 'http://localhost:3000/api/solution/votesolution',
    data: vote,
    withCredentials: true,
    headers: {
      Accept: "application/json",
    },
  })
    .then((res) => {
      commit('solutionVoted', res.data.data)
    })
    .catch((err) => {
      commit('votedSolutionError', err.response)
    })
}

如果有任何其他方法可以更新数组或我的代码有问题，我想听听。提前致谢。

Answer 1

好的，感谢@tony19，我刚刚意识到我正在发回投票的解决方案而不是整个数组。

Vue.js 数组在变异更新后消失

Vue.js array disappear after update it in mutation

arrays

vue.js

vuex

v-for