101 lines
2.9 KiB
Vue
101 lines
2.9 KiB
Vue
<!-- components/UrlSelect.vue -->
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<template>
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<el-select
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v-bind="$attrs"
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v-model="internalValue"
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@change="$emit('change', $event)"
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@blur="$emit('blur', $event)"
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@focus="$emit('focus', $event)"
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@clear="$emit('clear', $event)"
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@visible-change="$emit('visible-change', $event)"
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@remove-tag="$emit('remove-tag', $event)"
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@scroll="$emit('scroll', $event)"
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>
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<!-- 1. 原生 prefix 插槽 -->
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<slot name="prefix" />
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<!-- 2. 如果要实现分组插槽，也照搬 el-option-group 的结构 -->
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<slot name="option-group">
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<!-- 默认选项渲染 -->
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<el-option v-for="item in options" :key="item[valueKey]" :label="item[labelKey]" :value="item[valueKey]" />
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</slot>
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<!-- 3. 其他自定义插槽，不指定 name 的默认为 default slot -->
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<slot />
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<!-- 4. 下面这几个插槽是 el-select 也常见的： -->
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<slot name="empty" />
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<slot name="no-match" />
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<slot name="footer" />
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</el-select>
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</template>
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<script setup>
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import { ref, watch, onMounted } from 'vue';
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import request from '@/utils/axios';
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// -------------- ① 定义要继承/自定义的 Props --------------
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const props = defineProps({
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modelValue: {
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type: [String, Number, Array],
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default: null,
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},
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url: {
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type: String,
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default: null,
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},
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params: {
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type: Object,
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default: () => ({}),
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},
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// 可按需让上层指定 label 字段名、value 字段名
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labelKey: {
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type: String,
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default: 'label',
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},
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valueKey: {
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type: String,
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default: 'value',
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},
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});
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// -------------- ② 定义要透传回父组件的 Events --------------
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const emit = defineEmits(['update:modelValue', 'change', 'blur', 'focus', 'clear', 'visible-change', 'remove-tag', 'scroll']);
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// -------------- ③ 内部双向绑定 --------------
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// 用一个 ref 存储内部的值
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const internalValue = ref(props.modelValue);
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// 当 prop 变化时，同步到 internalValue
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watch(
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() => props.modelValue,
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(newVal) => {
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internalValue.value = newVal;
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}
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);
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// 当 internalValue 变化时，emit update:modelValue
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watch(internalValue, (newVal) => {
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emit('update:modelValue', newVal);
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});
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// -------------- ④ 选项列表 --------------
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const options = ref([]);
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// -------------- ⑤ 请求数据的函数 --------------
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async function fetchOptions() {
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// console.log('fetchOptions :>> ', props.url, props.params);
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if (!props.url) return;
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const res = await request.get(props.url, { params: props.params });
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const records = res.data.records;
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if (Array.isArray(records)) {
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options.value = records;
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// console.log('option', options.value);
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} else {
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options.value = [];
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console.log('UrlSelect：接口返回数据格式不是数组，无法解析成 options');
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}
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}
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// -------------- ⑥ 生命周期：组件挂载后立即拉一次数据 --------------
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onMounted(() => {
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fetchOptions();
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});
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</script>
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