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ant-design-vue-jeecg/src/components/jeecg/JTreeTable.vue 4.35 KB
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<template>
  <a-table
    :rowKey="rowKey"
    :columns="columns"
    :dataSource="dataSource"
    :expandedRowKeys="expandedRowKeys"
    v-bind="tableAttrs"
    v-on="$listeners"
    @expand="handleExpand"
    @expandedRowsChange="expandedRowKeys=$event">

    <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>
</template>

<script>
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import {getAction} from '@/api/manage'
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export default {
  name: 'JTreeTable',
  props: {
    rowKey: {
      type: String,
      default: 'id'
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    },
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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'
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    },
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    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
    },
    columns: {
      type: Array,
      required: true
    },
    url: {
      type: String,
      required: true
    },
    childrenUrl: {
      type: String,
      default: null
    },
    tableProps: {
      type: Object,
      default: () => ({})
    },
    /** 是否在创建组件的时候就查询数据 */
    immediateRequest: {
      type: Boolean,
      default: true
    },
    condition: {
      type: String,
      default: '',
      required: false
    }
  },
  data() {
    return {
      dataSource: [],
      expandedRowKeys: []
    }
  },
  computed: {
    getChildrenUrl() {
      if (this.childrenUrl) {
        return this.childrenUrl
      } else {
        return this.url
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      }
    },
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    slots() {
      let slots = []
      for (let column of this.columns) {
        if (column.scopedSlots && column.scopedSlots.customRender) {
          slots.push(column.scopedSlots.customRender)
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        }
      }
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      return slots
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    },
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    tableAttrs() {
      return Object.assign(this.$attrs, this.tableProps)
    }
  },
  watch: {
    queryParams: {
      deep: true,
      handler() {
        this.loadData()
      }
    }
  },
  created() {
    if (this.immediateRequest) this.loadData()
  },
  methods: {
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    /** 加载数据*/
    loadData(id = this.topValue, first = true, url = this.url) {
      this.$emit('requestBefore', {first})
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      if (first) {
        this.expandedRowKeys = []
      }
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      let params = Object.assign({}, this.queryParams || {})
      params[this.queryKey] = id
      if (this.condition && this.condition.length > 0) {
        params['condition'] = this.condition
      }
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      return getAction(url, params).then(res => {
        let list = []
        if (res.result instanceof Array) {
          list = res.result
        } else if (res.result.records instanceof Array) {
          list = res.result.records
        } else {
          throw '返回数据类型不识别'
        }
        let dataSource = list.map(item => {
          // 判断是否标记了带有子级
          if (item.hasChildren === true) {
            // 查找第一个带有dataIndex的值的列
            let firstColumn
            for (let column of this.columns) {
              firstColumn = column.dataIndex
              if (firstColumn) break
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            }
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            // 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: `${item.id}_loadChild`, [firstColumn]: 'loading...', isLoading: true}
            item.children = [loadChild]
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          }
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          return item
        })
        if (first) {
          this.dataSource = dataSource
        }
        this.$emit('requestSuccess', {first, dataSource, res})
        return Promise.resolve(dataSource)
      }).finally(() => this.$emit('requestFinally', {first}))
    },
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    /** 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
            if (dataSource.length === 0) {
              record.children = null
            } else {
              record.children = dataSource
            }
          })
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        }
      }
    }
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  }
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}
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</script>

<style scoped>

</style>