v-model not working with <component> in Vue 3?

Question

为什么在下面的示例中 v-model 没有绑定到我的输入？ 有限制吗？

<script setup>
import { ref } from 'vue'

const config = ref({
  headers: [
    { field: 'id', label: 'Id', component: { type: 'input' } }, 
    { field: 'name', label: 'Name', component: { type: 'input' }  },
    // more configs for radio buttons and other custom components
  ],
  data: [
    { id: 1, name: 'foo' },
    { id: 2, name: 'bar' }
  ]
})
</script>

<template>
  <table>
    <tr>
      <td v-for="header in config.headers">
        <b>{{ header.label }}</b>
      </td>
    </tr>
    <tr v-for="item in config.data">
      <td v-for="header in config.headers">
        <component :is="header.component.type" v-model="item[header.field]" />
      </td>
    </tr>
  </table>
  {{ config.data }}
</template>

Answer 1

Vue v-model Works great for native elements.

But it obviously doesn't work with

Your code generation

<input modelvalue="foo">

A very quick solution is to implement value binding directly.

:value="item[header.field]" @input="item[header.field] = $event.target.value"

But you will need to update the component accordingly to use value instead of modelValue.

renew

The workaround using v-model:value only works one way, the same as :value.

<component :is="header.component.type" v-model:value="item[header.field]" />

const { createApp, ref } = Vue

const config = ref({
  headers: [
    { field: 'id', label: 'Id', component: { type: 'input' } }, 
    { field: 'name', label: 'Name', component: { type: 'input' }  },
    // more configs for radio buttons and other custom components
  ],
  data: [
    { id: 1, name: 'foo' },
    { id: 2, name: 'bar' }
  ]
})

const App = {
  setup() {
    return { config, test: 1 }  
  }
}

const app = createApp(App)
app.mount('#app')

#app { line-height: 1.75; }
[v-cloak] { display: none; }

<div id="app">
<table>
    <tr>
      <td v-for="header in config.headers">
        <b>{{ header.label }}</b>
      </td>
    </tr>
    <tr v-for="item in config.data">
      <td v-for="header in config.headers">
        <component :is="header.component.type" :value="item[header.field]" @input="item[header.field] = $event.target.value" />
      </td>
    </tr>
  </table>
  {{ config.data }}
  <hr/>
  v-model test: <input v-model="test" />
</div>
<script src="https://unpkg.com/vue@3/dist/vue.global.prod.js"></script>