我有一个列表,可以通过一系列对象迭代,并生成依赖当前对象的列表项目。
必须用对象作为参数进行计算,这返回承诺。问题是,当列表渲染时,它只能访问Promise对象(即将待定(,并且一旦解决后就不会更新。
<md-list id="orderList">
<md-list-item v-for="order in orders" :key="order.id" @click="orderDialog(order)">
{{ asyncFunction(order) }}
</md-list-item>
</md-list>
如何获得所需的行为?
类似的东西应该对您有用。基本上,当承诺返回时,将异步响应存储在反应性阵列中。由于它是反应性的,一旦每个承诺返回,承诺响应将自动显示。
<template>
<md-list id="orderList">
<md-list-item v-for="(order,i) in orders" :key="order.id" @click="orderDialog(order)">
<template v-if="typeof asyncDataHolder[i] !== 'undefined'">
{{asyncDataHolder[i]}}
</template>
</md-list-item>
</md-list>
</template>
<script>
export default {
data: {
orders: [],
asyncDataHolder: []
},
created() {
// sample load orders
sampleLoadOrdersData().then(response => {
this.orders = response;
this.loadAsyncData();
});
},
methods: {
loadAsyncData() {
// async await version
this.orders.map(async (order, i) => {
const response = await asyncFunction(order);
this.$set(this.asyncDataHolder, i, response);
});
// normal promise version
this.orders.map((order, i) => {
asyncFunction(order).then(response => {
this.$set(this.asyncDataHolder, i, response);
});
});
}
}
};
</script>