naive-ui/demo/documentation/components/dynamicInput/enUS/form.md

# Use it in Form
`n-dynamic-input` itself cannot be tested. If you need to verify the input of` n-dynamic-input`, you can pass `n-form-item` in the custom content to complete the verification. Here is a complete example.
```html
<n-form :model="model" ref="form">
  <!--
    The key-field is set to make sure that each item can stay in the correct place. If not set, it may cause the
    item verification information disappears or is misplaced
  -->
  <n-dynamic-input
    v-model="model.dynamicInputValue"
    key-field="key"
    :on-create="onCreate"
    @clear="handleClear"
  >
    <template v-slot="{ index, value }">
      <div style="display: flex;">
        <!--
          Usually, the path change will cause the form-item verification content or rules to change, so naive-ui will clear the existing verification information. But this example is a special case. We know the changes in path will not cause changes in form-item verification content and rules, so set ignore-path-change
        -->
        <n-form-item
          ignore-path-change
          :path="`dynamicInputValue[${index}].name`"
          :rule="dynamicInputRule"
        >
          <n-input
            placeholder="Name"
            @keydown.enter.native.prevent
            v-model="model.dynamicInputValue[index].name"
          />
          <!--
           Since pressing enter on the input element will cause the button in the form to be clicked, the default behavior is prevented
          -->
        </n-form-item>
        <div style="height: 34px; line-height: 34px; margin: 0 8px;">=</div>
        <n-form-item
          ignore-path-change
          :path="`dynamicInputValue[${index}].value`"
          :rule="dynamicInputRule"
        >
          <n-input
            placeholder="Value"
            @keydown.enter.native.prevent
            v-model="model.dynamicInputValue[index].value"
          />
        </n-form-item>
      </div>
    </template>
  </n-dynamic-input>
</n-form>
<pre>
{{  JSON.stringify(model.dynamicInputValue, 0, 2) }}
</pre>
```
```js
export default {
  data () {
    return {
      dynamicInputRule: {
        trigger: 'input',
        validator (rule, value) {
          if (value.length >= 5) return new Error('Input up to four characters')
          return true
        }
      },
      model: {
        dynamicInputValue: [
          { key: 0, value: '' }
        ]
      }
    }
  },
  methods: {
    onCreate () {
      return {
        name: '',
        value: '',
        /** Generate a key to make the verification information will not be misplaced */
        key: Math.random().toString(16).slice(2, 10)
      }
    },
    /**
     Since clearing the content of input is an external action, input does not emit events, so form-item cannot get events emitted from input. Therefore, in order to verify the results are synchronized with the displayed values, manual verification is required. `$NextTick` is used to accept this event, the input value has just been placed in the event and has not yet been implemented into the actual value. You need to wait for the next tick to verify the new result.
     */
    handleClear () {
      this.$nextTick().then(
        () => this.$refs.form.validate()
      )
    }
  }
}
```