响应式绑定＜a-textarea＞的内容

项目中的?<a-textarea>组件需要自动填入下方数据表的物品名称+数量+单位，效果如下：

尝试 <a-textarea>{{插值}}</a-textarea>，实现不了，问ai得知需要使用v-decorator 指令的initialValue 属性

问：

如何绑定数据到textarea内容中？

<a-textarea :rows="4" v-decorator="[ 'content', { rules: [{ required: true, message: '请输入名称!' }] } ]"/>

ai答：

对于 Ant Design Vue 中的 <a-textarea> 组件，正确的绑定数据的方式是使用 v-decorator 指令的 initialValue 属性。

<template>
    <a-form :form="form">
        <a-form-item label="Content" :colon="false" :validate-status="getFieldError('content') ? 'error' : ''"
            :help="getFieldError('content') || ''">
            <a-textarea :rows="4"
                v-decorator="['content', { initialValue: content, rules: [{ required: true, message: '请输入内容!' }] }]"></a-textarea>
        </a-form-item>
        <a-form-item>
            <a-button type="primary" @click="submitForm">提交</a-button>
        </a-form-item>
    </a-form>
</template>

<script>
export default {
    data() {
        return {
            form: this.$form.createForm(this),
            content: '', // 数据属性用于绑定 <a-textarea> 的内容
        };
    },
    methods: {
        getFieldError(name) {
            const errors = this.form.getFieldError(name);
            if (errors && errors.length > 0) {
                return errors[0];
            } return '';
        },
        submitForm() {
            this.form.validateFields((errors, values) => {
                if (!errors) {
                    // 表单验证通过，执行提交操作
                    // ...
                }
            });
        },
    },
};
</script>

示例中，我们使用 initialValue 属性将 content 数据属性绑定到 <a-textarea> 的初始值上。这样，当页面加载时，<a-textarea> 的内容将会显示 content 的初始值。同时，当用户输入或修改 <a-textarea> 的内容时，content 的值也会相应地更新。

注意：initialValue表示初始值，如果用户不编辑<a-textarea> 的内容，绑定内容将一直跟随改变，一旦对<a-textarea> 的内容进行了编辑，内容就不再跟随绑定变量改变。

源码：

<template>
  <a-drawer
    title="物品入库"
    :maskClosable="false"
    placement="right"
    :closable="false"
    :visible="show"
    :width="1200"
    @close="onClose"
    style="height: calc(100% - 55px);overflow: auto;padding-bottom: 53px;"
  >
    <a-form :form="form" layout="horizontal">
      <a-row :gutter="32">
        <a-col :span="12">
          <a-form-item label='保管人' v-bind="formItemLayout">
            <a-input v-decorator="[
            'custodian',
            { rules: [{ required: true, message: '请输入保管人!' }] }
            ]"/>
          </a-form-item>
        </a-col>
        <a-col :span="12">
          <a-form-item label='入库人' v-bind="formItemLayout">
            <a-input v-decorator="[
            'putUser',
            { rules: [{ required: true, message: '请输入入库人!' }] }
            ]"/>
          </a-form-item>
        </a-col>
        <a-col :span="24">
          <a-form-item label='备注消息' v-bind="formItemLayout">
            <a-textarea :rows="4" v-decorator="[
              'content',
              { initialValue: txtcontent, rules: [{ required: true, message: '请输入名称!' }] }
            ]"/>
          </a-form-item>
        </a-col>
        <a-col :span="24">
          <a-table :columns="columns" :data-source="dataList">
            <template slot="nameShow" slot-scope="text, record">
              <a-input v-model="record.name"></a-input>
            </template>
            <template slot="typeShow" slot-scope="text, record">
              <a-input v-model="record.type"></a-input>
            </template>
            <template slot="typeIdShow" slot-scope="text, record">
              <a-select v-model="record.typeId" style="width: 100%">
                <a-select-option v-for="(item, index) in consumableType" :value="item.id" :key="index">{{ item.name }}</a-select-option>
              </a-select>
            </template>
            <template slot="unitShow" slot-scope="text, record">
              <a-input v-model="record.unit"></a-input>
            </template>
            <template slot="amountShow" slot-scope="text, record">
              <a-input-number v-model="record.amount" :min="1" :step="1" :precision="2" @change="handleChange(record)"/>
            </template>
            <template slot="consumptionShow" slot-scope="text, record">
              <a-input-number v-model="record.consumption" :min="0" :max="record.amount" :step="1" :precision="2" @change="handleChange(record)"/>
            </template>
            <template slot="priceShow" slot-scope="text, record">
              <a-input-number v-model="record.price" :min="0"/>
            </template>
          </a-table>
          <a-button @click="dataAdd" type="primary" ghost size="large" style="margin-top: 10px;width: 100%">
            新增物品
          </a-button>
        </a-col>
      </a-row>
    </a-form>
    <div class="drawer-bootom-button">
      <a-popconfirm title="确定放弃编辑？" @confirm="onClose" okText="确定" cancelText="取消">
        <a-button style="margin-right: .8rem">取消</a-button>
      </a-popconfirm>
      <a-button @click="handleSubmit" type="primary" :loading="loading">提交</a-button>
    </div>
  </a-drawer>
</template>

<script>
import {mapState} from 'vuex'
const formItemLayout = {
  labelCol: { span: 24 },
  wrapperCol: { span: 24 }
}
export default {
  name: 'stockAdd',
  props: {
    stockAddVisiable: {
      default: false
    }
  },
  computed: {
    ...mapState({
      currentUser: state => state.account.user
    }),
    show: {
      get: function () {
        return this.stockAddVisiable
      },
      set: function () {
      }
    },
    txtcontent () {
      // const string = JSON.stringify(contentlist)
      let string = ''
      this.dataList.forEach(item => {
        string += item.name + item.amount + item.unit + ' '
      })
      return string
    },
    columns () {
      return [{
        title: '序号',
        dataIndex: 'key'
      }, {
        title: '物品名称',
        dataIndex: 'name',
        scopedSlots: {customRender: 'nameShow'}
      }, {
        title: '所属类型',
        dataIndex: 'typeId',
        width: 200,
        scopedSlots: {customRender: 'typeIdShow'}
      }, {
        title: '型号',
        dataIndex: 'type',
        scopedSlots: {customRender: 'typeShow'}
      }, {
        title: '采购量',
        dataIndex: 'amount',
        scopedSlots: {customRender: 'amountShow'}
      }, {
        title: '消耗量',
        dataIndex: 'consumption',
        scopedSlots: {customRender: 'consumptionShow'}
      }, {
        title: '剩余量',
        dataIndex: 'balance'
      }, {
        title: '单位',
        dataIndex: 'unit',
        scopedSlots: {customRender: 'unitShow'}
      }, {
        title: '单价',
        dataIndex: 'price',
        scopedSlots: {customRender: 'priceShow'}
      }]
    }
  },
  mounted () {
    this.getConsumableType()
  },
  data () {
    return {
      dataList: [],
      formItemLayout,
      form: this.$form.createForm(this),
      loading: false,
      consumableType: [],
      keynumber: 1,
      textareacontent: '备注内容'
    }
  },
  methods: {
    getConsumableType () {
      this.$get('/cos/consumable-type/list').then((r) => {
        this.consumableType = r.data.data
      })
    },
    dataAdd () {
      this.dataList.push({key: this.keynumber++, name: '', type: '', typeId: '', unit: '', amount: 0, consumption: 0, balance: 0, price: 0})
    },
    reset () {
      this.loading = false
      this.form.resetFields()
    },
    onClose () {
      this.reset()
      this.$emit('close')
    },
    handleChange (record) {
      record.balance = (record.amount - record.consumption).toFixed(2)
    },
    handleSubmit () {
      let price = 0
      this.dataList.forEach(item => {
        price += item.price * item.amount
      })
      this.form.validateFields((err, values) => {
        values.price = price
        values.goods = JSON.stringify(this.dataList)
        if (!err) {
          this.loading = true
          this.$post('/cos/stock-info/put', {
            ...values
          }).then((r) => {
            this.reset()
            this.$emit('success')
          }).catch(() => {
            this.loading = false
          })
        }
      })
    }
  }
}
</script>

<style scoped>

</style>