我有一个预约应用程序,允许用户预订车辆。我列出了每天租车的费用,即每天100英镑。我如何计算租金的总成本?
在预订新(_form.html.erb) 用户选择开始日期和结束日期
<div class="field">
<%= form.label :startDate, "Start Date:" %>
<%= form.text_field :startDate, {class: "form-control custom", id: "start-date"}%>
</div>
<div class="field">
<%= form.label :endDate, "End Date:" %>
<%= form.text_field :endDate, {class: "form-control custom", id: "end-date"}%>
</div>
目前,费用字段是默认输入字段。
我可以使用
调用车辆费用<%= @vehicle.cost %>
我如何计算成本? 它会像endDate - startDate一样获得总天数然后乘以成本吗?
答案 0 :(得分:0)
总费用是每日价格*天数。
如果您想在控制器中计算价格:
Vue.component('my-comp', {
template: '#styled-input-tpl',
props: ['value']
});
Vue.directive('my-directive', {
bind: function (el, binding, vnode) {
vnode.componentInstance.$on('blur', function (e) {
console.log('received $on(blur) - event value:', event);
});
vnode.componentInstance.$on('input', function (e) {
console.log('received $on(input) - event value:', e);
});
el.addEventListener('blur', (e) => {
console.log('received NATIVE(blur) - event value:', e.target);
}, true); // <======================================================= IMPORTANT
el.addEventListener('input', (e) => {
console.log('received NATIVE(input) - event value:', e.target);
});
}
})
new Vue({
el: '#app'
})
如果您想在视图中更改日期:
<script src="https://unpkg.com/vue@2.5.16/dist/vue.min.js"></script>
<template id="styled-input-tpl">
<div>
<input
v-bind:value="value"
v-on:input="$emit('input', $event.target.value)"
v-on:blur="$emit('blur', $event.target.value)"
/>
</div>
</template>
<div id="app">
Edit the input, focus out, and check the console.
<my-comp v-my-directive :value="'edit me'"></my-comp>
</div>