Play 框架 2.x Scala 模板中的内联变量
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Inline variable in the Play framework 2.x Scala template
提问by user1051870
How to create an inline variable in the Play framework 2.x Scala template? Path from the Play's guideis not clear to me:
如何在 Play 框架 2.x Scala 模板中创建内联变量？我不清楚Play 指南中的路径：
@defining(user.firstName + " " + user.lastName) { fullName =>
<div>Hello @fullName</div>
}
回答by Farmor
First you don't create a variable but a valuemeaning it's read only.
首先，您不创建变量而是创建一个值，这意味着它是只读的。
In your example you have created a value fullNamewhich is accessible inside the curly brackets.
在您的示例中，您创建了一个fullName可在大括号内访问的值。
@defining("Farmor") { fullName =>
<div>Hello @fullName</div>
}
Will print Hello Farmor
将打印你好农夫
To define a value which is accessible globally in your template just embrace everything with your curly brackets.
要在模板中定义一个可全局访问的值，只需用大括号包含所有内容。
E.g.
例如
@defining("Value") { formId =>
@main("Title") {
@form(routes.Application.addPost, 'id -> formId) {
@inputText(name = "content", required = true)
<input type="submit" value="Create">
}
}
}
In the example you can use the value formIdanywere.
在示例中，您可以使用任何值formId。
回答by OlivierBlanvillain
If you don't want to use the @definingsyntax you can define a reusable blockwhich will be evaluated every time you use it:
如果您不想使用该@defining语法，您可以定义 a reusable block，每次使用时都会对其进行评估：
@fullName = @{
user.firstName + " " + user.lastName
}
<div>Hello @fullName</div>
With this same syntax you can also pass arguments to the block: https://github.com/playframework/Play20/blob/master/samples/scala/computer-database/app/views/list.scala.html
使用相同的语法，您还可以将参数传递给块：https: //github.com/playframework/Play20/blob/master/samples/scala/computer-database/app/views/list.scala.html
回答by user1051870
It's easy, span your block with code from the sample, then you will can use @fullNamevariable which has value:
很容易，使用示例中的代码跨越您的块，然后您将可以使用@fullName具有值的变量：
user.firstName + " " + user.lastName
