????????常規(guī)情況下。rules和formItem是一對(duì)一的。例如下面的情況，判斷表單內(nèi)的測(cè)試1和測(cè)試2是否為空。

<template>
    <el-form
        :model="formParams.form"
        :rules="formParams.rules"
    >
      <el-form-item label="測(cè)試1" prop="input1">
        <el-input v-model="formParams.form.input1"></el-input>
      </el-form-item>
      <el-form-item label="測(cè)試2" prop="input2">
        <el-input v-model="formParams.form.input2"></el-input>
      </el-form-item>
    </el-form>
</template>
<script lang="ts" setup>
import {reactive} from "vue";

const formParams = reactive({
  form:{
    input1: "",
    input2: ""
  },
  rules: {
    input1: {
      validator: validator_isEmpty,
      trigger: 'change'
    },
    input2: {
      validator: validator_isEmpty,
      trigger: 'change'
    }
  }
})
function validator_isEmpty (rule: any, value: string, callback: any)  {
  if (isEmpty(value)) {
  callback(new Error("必填項(xiàng)，請(qǐng)輸入數(shù)據(jù)"));
} else {
  callback();
}
}
const isEmpty = function (value: any) {
  if (
      value === null ||
      value === undefined ||
      value === "" ||
      value.toString().trim() === "" ||
      value.length === 0 ||
      Object.keys(value.toString()).length === 0 ||
      JSON.stringify(value) === "[{}]"
  ) {
    return true;
  } else {
    return false;
  }
}
</script>
<style scoped lang="scss">

</style>

? ? ? ? 但是，如果在table中就按照常規(guī)的寫法如下會(huì)發(fā)現(xiàn)不管如何輸入或刪除都將觸發(fā)valid=false校驗(yàn)。如果在validator_isEmpty中打印value值會(huì)發(fā)現(xiàn)，value一直未undefined。

<template>
  <el-form
      :model="tableData.data"
      :rules="tableData.rules"
  >
    <el-table
        :data="tableData.data">
      <el-table-column label="測(cè)試1">
        <template #default="scope">
          <el-form-item prop="input1">
            <el-input v-model="scope.row.input1"></el-input>
          </el-form-item>
        </template>
      </el-table-column>
      <el-table-column label="測(cè)試2">
        <template #default="scope">
          <el-form-item prop="input2">
            <el-input v-model="scope.row.input2"></el-input>
          </el-form-item>
        </template>
      </el-table-column>
    </el-table>
  </el-form>

</template>
<script lang="ts" setup>
import {reactive} from "vue";

let tableData = reactive({
data:[
  {
    input1: "",
    input2: ""
  }
],
rules: {
    input1: {
      validator: validator_isEmpty,
      trigger: 'change'
    },
    input2: {
      validator: validator_isEmpty,
      trigger: 'change'
    }
  }
})
const formParams = reactive({
  form: {
    input1: "",
    input2: ""
  },
  rules: {
    input1: {
      validator: validator_isEmpty,
      trigger: 'change'
    },
    input2: {
      validator: validator_isEmpty,
      trigger: 'change'
    }
  }
})

function validator_isEmpty(rule: any, value: string, callback: any) {
  if (isEmpty(value)) {
    callback(new Error("必填項(xiàng)，請(qǐng)輸入數(shù)據(jù)"));
  } else {
    callback();
  }
}

const isEmpty = function (value: any) {
  if (
      value === null ||
      value === undefined ||
      value === "" ||
      value.toString().trim() === "" ||
      value.length === 0 ||
      Object.keys(value.toString()).length === 0 ||
      JSON.stringify(value) === "[{}]"
  ) {
    return true;
  } else {
    return false;
  }
}
</script>
<style scoped lang="scss">

</style>

? ? ? ? 所以使用下面的方式。但是有幾個(gè)重點(diǎn)。

1、外層的el-form的model需要關(guān)聯(lián)到tableData.data，否則使用validate方法將無法觸發(fā)

2、去掉外層el-form的rules屬性

3、對(duì)el-table-column里的el-form-item添加rules屬性，其中rules中的validator采用bind的方式傳遞行參數(shù)

4、對(duì)el-table-column里的el-form-item中prop屬性需要保留

之后的操作就跟普通的form驗(yàn)證一樣

<template>
  <el-form
      :model="tableData.data"
  >
    <el-table
        :data="tableData.data">
      <el-table-column label="測(cè)試1">
        <template #default="scope">
          <el-form-item prop="input1" :rules="{
            validator: validator_isEmpty_arg.bind(this, scope.row.input1),
            trigger: 'change'
          }">
            <el-input v-model="scope.row.input1"></el-input>
          </el-form-item>
        </template>
      </el-table-column>
      <el-table-column label="測(cè)試2">
        <template #default="scope">
          <el-form-item prop="input2" :rules="{
            validator: validator_isEmpty_arg.bind(this, scope.row.input2),
            trigger: 'change'
          }">
            <el-input v-model="scope.row.input2"></el-input>
          </el-form-item>
        </template>
      </el-table-column>
    </el-table>
  </el-form>

</template>
<script lang="ts" setup>
import {reactive} from "vue";

let tableData = reactive({
  data: [
    {
      input1: "",
      input2: ""
    }
  ]
})

function validator_isEmpty_arg(rowValue: any, rule: any,value: string, callback: any){
  if (isEmpty(rowValue)) {
    callback(new Error("必填項(xiàng)，請(qǐng)輸入數(shù)據(jù)"));
  } else {
    callback();
  }
}

const isEmpty = function (value: any) {
  if (
      value === null ||
      value === undefined ||
      value === "" ||
      value.toString().trim() === "" ||
      value.length === 0 ||
      Object.keys(value.toString()).length === 0 ||
      JSON.stringify(value) === "[{}]"
  ) {
    return true;
  } else {
    return false;
  }
}
</script>
<style scoped lang="scss">

</style>

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