<templete slot-scope="scope">
    <el-form-item :prop="'list'. + scope.$index + '.goodModularId'">
        <!-- change事件中，會獲取到當前選中的值（因為默認會將event參數(shù)傳遞過去;
			如果想要傳遞多個值，change($event, "傳遞的其他值")，將“選中的當前元素” 和 “傳遞的其他值” 一起傳遞過去 -->
        <el-select v-model="ruleForm.goodModularId" @change="getModularValue($event, scope.$index)" @clear="delModularValue(scope.$index)">
            <el-option v-for="(item,index) in modularData" :key="index" :value="item.id" :label="item.name"></el-option>
        </el-select>
    </el-form-item>
</templete>

<script>
    data() {
        return {
            ruleForm: {
                list: [{
                    goodModularId: '',
                	goodModular: ''
                }]
            }
        }
    }
    methods: {
        // 獲取value值給goodModular
        getModularValue(val,index) {
            let obj = this.modularData.find(item => item.id === val)
            // 判斷的時候可以直接寫obj而不需要以判斷對象是否為空的方式是因為：如果找不到，find方法返回的是undefined而不是空對象
            if(obj) {
                this.ruleForm.list[index].goodModular = obj.name
            } else {
                this.ruleForm.list[index].goodModular = ''
            } 
    	}
        // 清空選項事件
        delModularValue(index) {
            this.ruleForm.list[index].goodModular = ''
        }
    }
</script>

<templete slot-scope="scope">
    <el-form-item :prop="'list'. + scope.$index + '.goodModularId'">
        <el-select v-model="ruleForm.goodModularId" @clear="delModularValue(scope.$index)">
            <el-option v-for="(item,index) in modularData" :key="index" :value="item.id" :label="item.name" @click.native="getModularValue(item.id, scope.$index)"></el-option>
        </el-select>
    </el-form-item>
</templete>


<script>
    data() {
        return {
            ruleForm: {
                list: [{
                    goodModularId: '',
                	goodModular: ''
                }]
            }
        }
    }
    methods: {
        getModularValue(val,index) {
        	let obj = this.modularData.find(item => item.id === val)
            if(obj) {
                this.ruleForm.list[index].goodModular = obj.name
            } else {
                this.ruleForm.list[index].goodModular = ''
            }           
    	},
        delModularValue(index) {
            this.ruleForm.list[index].goodModular = ''
        }
    }
</script>

<el-form-item label="類別" prop="categoryId">
	<el-select v-model="ruleForm.categoryId" @clear="clearCategory">
	    <el-option v-for="(item,index) in categoryOptions" :key="item.id" :value="item.id" :label="item.name" @click.native="getValue(item.name, categoryName)"></el-option>
	</el-select>
</el-form-item>

getValue(val, type) {
	this.ruleForm[type] = val
}
clearCategory() {
	this.ruleForm.categoryName = ''
}