<template>
  <el-form
    ref="ruleForm"
    :rules="rules"
    :model="form"
    inline
  >
    <el-form-item label="企業(yè)性質(zhì)" prop="natureEnterprise">
      <el-select v-model="form.natureEnterprise">
        <el-option
          label="國(guó)企"
          :value="1"
        />
        <el-option
          label="事業(yè)單位"
          :value="2"
        />
        <el-option
          label="個(gè)體戶"
          :value="3"
        />
      </el-select>
    </el-form-item>
    <el-form-item label="業(yè)務(wù)類型" prop="type">
      <el-select v-model="form.type">
        <el-option
          label="護(hù)膚"
          :value="1"
        />
        <el-option
          label="食品"
          :value="2"
        />
      </el-select>
    </el-form-item>
    <el-form-item label="企業(yè)名稱" prop="name">
      <el-input v-model="form.name" placeholder="請(qǐng)輸入"></el-input>
    </el-form-item>
    <el-form-item label="社會(huì)統(tǒng)一信用代碼" prop="creditCode">
      <el-input v-model="form.creditCode" placeholder="請(qǐng)輸入"></el-input>
    </el-form-item>
    <el-form-item label="注冊(cè)地址" prop="address">
      <el-input v-model="form.address" placeholder="請(qǐng)輸入"></el-input>
    </el-form-item>
  </el-form>
</template>
<script>
export default {
    data() {
        return {
          form: {
            natureEnterprise: null,
            type: null,
            address: '',
            name: '',
            creditCode: ''
          },
          rules: {
            natureEnterprise: [
              { required: true, message: '企業(yè)性質(zhì)不能為空', trigger: 'change' }
            ],
            type: [
              { required: true, message: '業(yè)務(wù)類型不能為空', trigger: 'change' }
            ],
            address: [
              { required: true, message: '注冊(cè)地址不能為空', trigger: 'change' }
            ],
            name: [
              { required: true, message: '企業(yè)名稱不能為空', trigger: 'change' }
            ],
            creditCode: [
              { required: true, message: '社會(huì)統(tǒng)一信用代碼不能為空', trigger: 'change' }
            ]
          }
        }
    }
}
</script>

watch: {
  'form.natureEnterprise': {
    hanlder(val) {
      this.rules.creditCode[0].required = val !== 3
      this.rules.address[0].required = val !== 3
    }
  }
}

computed: {
  rules({ form }) {
      // 是否個(gè)體戶
    const isSelfEmploy = form.natureEnterprise === 3
    return {
      natureEnterprise: [
        { required: true, message: '企業(yè)性質(zhì)不能為空', trigger: 'change' }
      ],
      type: [
        { required: true, message: '業(yè)務(wù)類型不能為空', trigger: 'change' }
      ],
      name: [
        { required: true, message: '企業(yè)名稱不能為空', trigger: 'change' }
      ],
      address: [
        { required: !isSelfEmploy, message: '注冊(cè)地址不能為空', trigger: 'change' }
      ],
      creditCode: [
        { required: !isSelfEmploy, message: '社會(huì)統(tǒng)一信用代碼不能為空', trigger: 'change' }
      ]
    }
  }
}

<el-form
  :validate-on-rule-change="false"
></el-form>

// 父組件：main-form.vue
<template>
  <!-- 子組件-基礎(chǔ)信息表單 -->
  <base-form ref="baseFormRef" />
  <!-- 子組件-合作信息表單 -->
  <coop-form ref="coopFormRef" />
  <el-button type="primary" @click="handleSave">保存</el-button>
</template>
<script>
import BaseForm from './base-form'
import CoopForm from './coop-form'
export default {
  components: {
    BaseForm,
    CoopForm
  },
  methods: {
    async handleSave() {
      // 調(diào)用子組件提供的方法，獲取表單數(shù)據(jù)
      const baseFormData = await this.$refs['baseFormRef'].validate()
      const coopFormData = await this.$refs['coopFormRef'].validate()
      if (baseFormData && coopFormData) {
        // 如果校驗(yàn)通過(guò)，拼接子組件數(shù)據(jù)進(jìn)行提交
        const mainFormData = {
          ...baseFormData,
          ...coopFormData
        }
        // 提交數(shù)據(jù)
        await saveApi(mainForm)
        this.$message.success('保存成功！')
      }
    }
  }
}
</script>

// 子組件示例：base-form.vue
<template>
  <el-form ref="ruleForm" :model="form" :rules="rules">
  </el-form>
</template>
<script>
export default {
  data() {
    return {
      form: {
        // ...
      },
      rules: {
        // ...
      }
    }
  },
  methods: {
    // 提供給父組件的方法并返回表單數(shù)據(jù)
    validate() {
      return new Promise(resolve => {
        this.$refs['ruleForm'].validate(valid => {
          // 校驗(yàn)通過(guò)返回表單數(shù)據(jù)，反之，返回null
          if (valid) {
            resolve(this.form)
          } else {
            resolve(null)
          }
        })
      })
    }
  }
}
</script>

// vuex里新建文件用來(lái)存放表單通信數(shù)據(jù)
// src/store/modules/formDta.js
export default {
  namespaced: true,
  state: {
    natureEnterprise: ''
  },
  mutations: {
    SET_NATURE_ENTERPRISE(state, payload) {
      state.natureEnterprise = payload
    }
  }
}
// src/store/index.js
import Vue from 'vue'
import Vuex from 'vuex'
import formData from './modules/formData.js'
Vue.use(Vuex)
export default new Vuex.Store({
  modules: {
    formData
  }
})

// base-form.vue
watch: {
  'form.natureEnterprise': {
    handler(val) {
      // 將企業(yè)性質(zhì)的值存儲(chǔ)到vuex里
      this.$store.commit('formData/SET_NATURE_ENTERPRISE', val)
    }
  }
}

// coop-form.vue
computed: {
  ...mapState('formData', [
    'natureEnterprise'
  ]),
  rules() {
    return {
      address: [
        { required: this.natureEnterprise === 1, message: '注冊(cè)地址不能為空', trigger: 'change' }
      ]
    }
  }
}