151 lines
4.5 KiB
Markdown
151 lines
4.5 KiB
Markdown
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---
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outline: deep
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---
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# Vben ApiComponent Api组件包装器
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框架提供的API“包装器”，它一般不独立使用，主要用于包装其它组件，为目标组件提供自动获取远程数据的能力，但仍然保持了目标组件的原始用法。
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::: info 写在前面
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我们在各个应用的组件适配器中，使用ApiComponent包装了Select、TreeSelect组件，使得这些组件可以自动获取远程数据并生成选项。其它类似的组件（比如Cascader）如有需要也可以参考示例代码自行进行包装。
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:::
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## 基础用法
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通过 `component` 传入其它组件的定义，并配置相关的其它属性（主要是一些名称映射）。包装组件将通过`api`获取数据（`beforerFetch`、`afterFetch`将分别在`api`运行前、运行后被调用），使用`resultField`从中提取数组，使用`valueField`、`labelField`等来从数据中提取value和label（如果提供了`childrenField`，会将其作为树形结构递归处理每一级数据），之后将处理好的数据通过`optionsPropName`指定的属性传递给目标组件。
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::: details 包装级联选择器,点击下拉时开始加载远程数据
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```vue
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<script lang="ts" setup>
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import { ApiComponent } from '@vben/common-ui';
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import { Cascader } from 'ant-design-vue';
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const treeData: Record<string, any> = [
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{
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label: '浙江',
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value: 'zhejiang',
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children: [
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{
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value: 'hangzhou',
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label: '杭州',
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children: [
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{
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value: 'xihu',
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label: '西湖',
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},
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{
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value: 'sudi',
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label: '苏堤',
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},
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],
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},
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{
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value: 'jiaxing',
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label: '嘉兴',
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children: [
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{
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value: 'wuzhen',
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label: '乌镇',
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},
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{
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value: 'meihuazhou',
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label: '梅花洲',
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},
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],
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},
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{
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value: 'zhoushan',
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label: '舟山',
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children: [
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{
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value: 'putuoshan',
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label: '普陀山',
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},
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{
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value: 'taohuadao',
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label: '桃花岛',
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},
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],
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},
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],
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},
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{
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label: '江苏',
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value: 'jiangsu',
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children: [
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{
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value: 'nanjing',
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label: '南京',
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children: [
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{
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value: 'zhonghuamen',
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label: '中华门',
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},
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{
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value: 'zijinshan',
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label: '紫金山',
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},
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{
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value: 'yuhuatai',
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label: '雨花台',
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},
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],
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},
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],
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},
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];
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/**
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* 模拟请求接口
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*/
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function fetchApi(): Promise<Record<string, any>> {
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return new Promise((resolve) => {
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setTimeout(() => {
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resolve(treeData);
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}, 1000);
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});
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}
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</script>
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<template>
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<ApiComponent
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:api="fetchApi"
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:component="Cascader"
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:immediate="false"
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children-field="children"
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loading-slot="suffixIcon"
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visible-event="onDropdownVisibleChange"
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/>
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</template>
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```
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:::
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### Props
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| 属性名 | 描述 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| component | 欲包装的组件 | `Component` | - |
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| numberToString | 是否将value从数字转为string | `boolean` | `false` |
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| api | 获取数据的函数 | `(arg?: any) => Promise<OptionsItem[] \| Record<string, any>>` | - |
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| params | 传递给api的参数 | `Record<string, any>` | - |
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| resultField | 从api返回的结果中提取options数组的字段名 | `string` | - |
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| labelField | label字段名 | `string` | `label` |
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| childrenField | 子级数据字段名，需要层级数据的组件可用 | `string` | `` |
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| valueField | value字段名 | `string` | `value` |
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| optionsPropName | 组件接收options数据的属性名称 | `string` | `options` |
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| modelPropName | 组件的双向绑定属性名，默认为modelValue。部分组件可能为value | `string` | `modelValue` |
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| immediate | 是否立即调用api | `boolean` | `true` |
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| alwaysLoad | 每次`visibleEvent`事件发生时都重新请求数据 | `boolean` | `false` |
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| beforeFetch | 在api请求之前的回调函数 | `AnyPromiseFunction<any, any>` | - |
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| afterFetch | 在api请求之后的回调函数 | `AnyPromiseFunction<any, any>` | - |
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| options | 直接传入选项数据，也作为api返回空数据时的后备数据 | `OptionsItem[]` | - |
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| visibleEvent | 触发重新请求数据的事件名 | `string` | - |
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| loadingSlot | 组件的插槽名称，用来显示一个"加载中"的图标 | `string` | - |
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```
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```
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