forms - Vue中如何正确初始化表单数据

Question

所以我有一个渲染表单的组件，它还使用从 ajax 请求接收的数据预先填充字段。

我的问题是，我不仅希望能够编辑字段，还希望同时添加要提交的新字段，因此我试图将我的预填充数据和新数据初始化为要提交的同一个对象与我的 ajax 请求 .使用我当前的设置，表单数据在呈现表单之前并不一致地填充字段。

这是表单模板

<form @submit.prevent="editThisWorkflow" class="d-flex-column justify-content-center" >

 <div>
   <input type="text" v-model="workflowData.workflow">
    </div>
    <div >
    <div v-for="object in workflowData.statuses" :key="object.id">
    <input type="text" v-model="object.status">
    </div>
    <div v-for="(status, index) in workflowData.newStatuses" :key="index">
    <input type="text" placeholder="Add Status" v-model="status.value">
    <button type="button" @click="deleteField(index)">X</button>
    </div>
    <button type="button" @click="addField">
      New Status Field
    </button>
    </div>
    <div>
    <div>
    <button type="submit">Save</button>
    <router-link  :to="{ path: '/administrator/workflows'}" >Cancel</router-link>
  </div>
 </div>

</form>

这是脚本

data() {
        return {
            workflowData: {
                id: this.$store.state.workflow.id,
                workflow: this.$store.state.workflow.workflow,
                statuses: this.$store.state.workflow.statuses,
                newStatuses: []
            },
            workflowLoaded: false
        }
    },
    computed: {
    ...mapGetters(['workflow']),
  },
  methods: {
    ...mapActions(['editWorkflow']),
    editThisWorkflow() {
        this.editWorkflow({
           id: this.workflowData.id,
           workflow: this.workflowData.workflow,
           statuses: this.workflowData.statuses,
           newStatuses: this.workflowData.newStatuses
        })
    },
    addField() {
        this.workflowData.newStatuses.push({ value: ''});
    },
    deleteField(index) {
        this.workflowData.newStatuses.splice(index, 1);
    }

这是提交数据的存储方法

editWorkflow(context, workflowData) {
      axios.patch('/workflowstatuses/' + workflowData.id, {
        workflow: workflowData.workflow,
        statuses: workflowData.statuses,
        newStatuses: workflowData.newStatuses
      })
      .then(response => {
          context.commit('editWorkflow', response.data)
      })
      .catch(error => {
          console.log(error.response.data)
      })           
    },

我的问题出现在这里

 data() {
        return {
            workflowData: {
                id: this.$store.state.workflow.id,
                workflow: this.$store.state.workflow.workflow,
                statuses: this.$store.state.workflow.statuses,
                newStatuses: []
            },
            workflowLoaded: false
        }
    },

有没有更好的方法来设置这部分？

workflowData: {
    id: this.$store.state.workflow.id,
    workflow: this.$store.state.workflow.workflow,
    statuses: this.$store.state.workflow.statuses,
    newStatuses: []
},

Answer 1

如果您只需要为表单分配一次 store 值，那么您可以使用 mount 函数。

mounted: function() {
   this.id = this.$store.state.workflow.id
   this.workflow = this.$store.state.workflow.workflow
   this.statuses = this.$store.state.workflow.statuses
},
data() {
      return {
          workflowData: {
              id: '',
              workflow: '',
              statuses: '',
              newStatuses: []
          },
          workflowLoaded: false
      }
 },