在 Play 模板中混合 JavaScript 和 Scala [英] Mixing JavaScript and Scala in a Play template
问题描述
我不确定这是如何完成的.我可以对要使用的路线进行硬编码,但我想以正确的方式进行.
I'm not sure how this is done. I could hard code the route I'm trying to use, but I'd like to do this the right way.
我有一个下拉菜单,需要在更改时加载新页面.这基本上是我尝试这样做的方式(我已经尝试了一些变体):
I have a dropdown that needs to load a new page on change. Here's basically how I'm trying to do it (I've tried a few variations of this):
@getRoute(value: String) = @{
routes.Accounts.transactions(Long.valueOf(value))
}
<script type="text/javascript">
$(function() {
$("select[name='product']").change(function() {
location.href = @getRoute($(this).val());
}).focus();
$('a.view.summary').attr('href', "@routes.Accounts.index()" + "?selectedAccountKey=" + $('select[name=product]').val());
});
</script>
这会产生 identifier expected but 'val' found
异常.我也尝试用引号将它括起来,但这会导致 [NumberFormatException: For input string: "$(this).val()"]
This produces a identifier expected but 'val' found
exception. I also tried surrounding it in quotes, but that causes a [NumberFormatException: For input string: "$(this).val()"]
那么如何将 JavaScript 中的值插入到 Scala 函数中?
So how the heck do I insert a value from JavaScript into a Scala function?
编辑
这是我的解决方案,灵感来自已接受的答案.此下拉列表在一个标记中定义,该标记供不同组件重用,并且每个组件的基本 URL 都不同.实现此目的的方法是将根据帐户密钥生成 URL 的函数传递到下拉列表中:
Here's my solution, inspired by the accepted answer. This dropdown is defined in a tag that's made for reuse by different components, and the base URL is different for each component. The way to achieve this was to pass a function that generates a URL based on an account key into the dropdown:
@(accountList: List[models.MemberAccount],
selectedAccountKey: Long,
urlGenerator: (Long) => Html
)
<select name="product">
@for(account <- accountList) {
@if(account.accountKey == selectedAccountKey) {
<option selected="selected" value="@urlGenerator(account.accountKey)">@account.description (@account.startDate)</option>
} else {
<option value="@urlGenerator(account.accountKey)">@account.description (@account.startDate)</option>
}
}
</select>
<script type="text/javascript">
$(function() {
$('select[name=product]').change(function() {
location.href = $(this).val();
});
});
</script>
然后你可以定义一个这样的函数传入:
Then you can define a function like this to pass in:
@transactionsUrl(memberAccountKey: Long) = {
@routes.Accounts.transactions(memberAccountKey)
}
@accountsDropdown(transactionDetails.getMemberAccounts(), transactionDetails.getMemberAccountKey(), transactionsUrl)
推荐答案
您需要一种方法来存储页面中的所有 URL,例如
You need a way of storing all URLs in the page, e.g.
<option value="@routes.Accounts.transactions(id)">Display</option>
然后onChange,你可以:
Then onChange, you can:
$("select[name='product']").change(function() {
location.href = $(this).val();
});
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