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<template>
<a-table
:rowKey="rowKey"
:columns="columns"
:dataSource="dataSource"
v-bind="tableProps"
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@expand="handleExpand">
<template v-for="(slotItem) of slots" :slot="slotItem" slot-scope="text, record, index">
<slot :name="slotItem" v-bind="{text,record,index}"></slot>
</template>
</a-table>
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</template>
<script>
import { getAction } from '@/api/manage'
export default {
name: 'JTreeTable',
props: {
rowKey: {
type: String,
default: 'id'
},
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// 根据什么查询，如果传递 id 就根据 id 查询
queryKey: {
type: String,
default: 'parentId'
},
queryParams: {
type: Object,
default: () => {
}
},
// 查询顶级时的值，如果顶级为0，则传0
topValue: {
type: String,
default: null
},
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columns: {
type: Array,
required: true
},
url: {
type: String,
required: true
},
childrenUrl: {
type: String,
default: null
},
tableProps: {
type: Object,
default: () => {
}
}
},
data() {
return {
dataSource: []
}
},
computed: {
getChildrenUrl() {
if (this.childrenUrl) {
return this.childrenUrl
} else {
return this.url
}
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},
slots() {
let slots = []
for (let column of this.columns) {
if (column.scopedSlots && column.scopedSlots.customRender) {
slots.push(column.scopedSlots.customRender)
}
}
return slots
}
},
watch: {
queryParams: {
deep: true,
handler() {
this.loadData()
}
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}
},
created() {
this.loadData()
},
methods: {
/** 加载数据*/
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loadData(id = this.topValue, first = true, url = this.url) {
let params = Object.assign({}, this.queryParams || {})
params[this.queryKey] = id
return getAction(url, params).then(res => {
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let dataSource = res.result.map(item => {
// 判断是否标记了带有子级
if (item.hasChildren === true) {
// 定义默认展开时显示的loading子级，实际子级数据只在展开时加载
let loadChild = { id: `${item.id}_loadChild`, name: 'loading...', isLoading: true }
item.children = [loadChild]
}
return item
})
if (first) {
this.dataSource = dataSource
}
return Promise.resolve(dataSource)
})
},
/** 点击展开图标时触发 */
handleExpand(expanded, record) {
// 判断是否是展开状态
if (expanded) {
// 判断子级的首个项的标记是否是“正在加载中”，如果是就加载数据
if (record.children[0].isLoading === true) {
this.loadData(record.id, false, this.getChildrenUrl).then(dataSource => {
// 处理好的数据可直接赋值给children
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if (dataSource.length === 0) {
record.children = null
} else {
record.children = dataSource
}
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})
}
}
}
}
}
</script>
<style scoped>
</style>
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