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Twig“_self”变量

[英]Twig “_self” variable

原文 2014-01-13 19:02:10 0 2 symfony/ twig

Where is documented the existence of this keyword? 在哪里记录了这个关键字的存在？ (I guess it is a constant, rather than an object, right?). （我想这是一个常数，而不是一个对象，对吧？）。

Anyway, I'd like to know where it is documented, to see if there are other keywords that I don't know about. 无论如何，我想知道它在哪里记录，看看是否还有其他我不了解的关键词。

Thanks 谢谢

2 个解决方案

This doesn't really answer the question, but I think it's important to mention it. 这并没有真正回答这个问题，但我认为提及它很重要。 The _self itself is not really deprecated nor removed, but its usage is! _self本身并没有真正被弃用或删除，但它的用法是！

If you look for deprecated features in Twig 2.*, you'll find there are none . 如果您在Twig 2. *中查找已弃用的功能，您会发现没有。 So, you may think falsely that you're safe, or scratch your head (like I did) in finding why did it stop working in v2.0. 所以，你可能会错误地认为你是安全的，或者在你发现为什么它在v2.0中停止工作时刮挠你的头（就像我一样）。

But actually, in Twig v1, _self was an object, with which you could do _self.templateName , or call Twig macros with it. 但实际上，在Twig v1中， _self是一个对象，您可以使用它来执行_self.templateName ，或者使用它来调用Twig宏。 Its usage as object was deprecated but it worked. 它作为对象的用法已被弃用但它有效。

In Twig v2, _self is no more an object but a string, which actually holds the templates name (the previous value of _self.templateName ). 在Twig v2中， _self不再是一个对象而是一个字符串，它实际上包含模板名称（ _self.templateName的前一个值）。

So, if you used it in Twig v1 as an object - your code will fail in Twig v2. 因此，如果您在Twig v1中使用它作为对象 - 您的代码将在Twig v2中失败。 Anyway, it seems like a bit messy resolution of the _self issue. 无论如何，对于_self问题似乎有点混乱。