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57 lines
3.2 KiB
Markdown
Executable File
57 lines
3.2 KiB
Markdown
Executable File
---
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title: Chain-Select 链式下拉框
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description:
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type: 0
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group: null
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menuName: Chain-Select
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icon:
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order: 7
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---
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## 基本用法
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用于实现无限级别下拉，只支持单选，且必须和 `source` 搭配，通过 API 拉取数据，只要 API 有返回结果，就能一直无限级别下拉。
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```schema: scope="body"
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{
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"type": "form",
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"debug": true,
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"api": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/mock2/form/saveForm",
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"controls": [
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{
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"name": "select3",
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"type": "chained-select",
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"label": "级联下拉",
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"source": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/mock2/options/chainedOptions?waitSeconds=1&parentId=$parentId&level=$level&maxLevel=4",
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"value": "a,b"
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}
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]
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}
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```
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> `source`接口中配置的参数`waitSeconds=1`和`maxLevel=4`是测试接口所需参数，实际使用自己接口时不需要添加这两个参数
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## 暴露参数
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为了帮助后端接口获取当前选择器状态，chained-select 会默认给 source 接口的数据域中，添加若干个参数：
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- `value`: 选中的表单项值；
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- `level`: 当前拉取数据时的层级,
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- `parentId`: 上一级选项的值，数据格式基于配置的`joinValues`和`extractValue`属性
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- `parent`: 上一级选项的完整的数据格式
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## 属性表
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除了支持 [普通表单项属性表](./formitem#%E5%B1%9E%E6%80%A7%E8%A1%A8) 中的配置以外，还支持下面一些配置
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| 属性名 | 类型 | 默认值 | 说明 |
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| ------------ | ----------------------------------------- | --------- | ------------------------------------------------------------------------------------------- |
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| options | `Array<object>`或`Array<string>` | | [选项组](./options#%E9%9D%99%E6%80%81%E9%80%89%E9%A1%B9%E7%BB%84-options) |
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| source | `string`或 [API](../../../docs/types/api) | | [动态选项组](./options#%E5%8A%A8%E6%80%81%E9%80%89%E9%A1%B9%E7%BB%84-source) |
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| autoComplete | `string`或 [API](../../../docs/types/api) | | [自动选中](./options#%E8%87%AA%E5%8A%A8%E8%A1%A5%E5%85%A8-autocomplete) |
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| delimiter | `string` | `,` | [拼接符](./options#%E6%8B%BC%E6%8E%A5%E7%AC%A6-delimiter) |
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| labelField | `boolean` | `"label"` | [选项标签字段](./options#%E9%80%89%E9%A1%B9%E6%A0%87%E7%AD%BE%E5%AD%97%E6%AE%B5-labelfield) |
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| valueField | `boolean` | `"value"` | [选项值字段](./options#%E9%80%89%E9%A1%B9%E5%80%BC%E5%AD%97%E6%AE%B5-valuefield) |
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| joinValues | `boolean` | `true` | [拼接值](./options#%E6%8B%BC%E6%8E%A5%E5%80%BC-joinvalues) |
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| extractValue | `boolean` | `false` | [提取值](./options#%E6%8F%90%E5%8F%96%E5%A4%9A%E9%80%89%E5%80%BC-extractvalue) |
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