如何在Rails 3.1资产管道中正确使用jQuery? [英] How to properly work with jQuery in Rails 3.1 asset pipeline?

问题描述

我正在开发一个业余应用程序并使用一些jQuery.目前，结果还不错，但是我是jQuery noob，我认为我可以对代码结构进行一些重大改进.暂时不考虑Coffescript，我一直想知道的一件事是如何在资产管道中正确使用特定于模型的.js文件.

I'm working on a hobby app and using some jQuery. The results are fine at the moment, but I'm a jQuery noob and I assume that there are some significant improvements that I can make to the code structure. Putting aside Coffescript for the moment, one thing that I've been wondering is how to properly use the model-specific .js files in the asset pipeline.

例如，当使用我的用户模型时，当文档准备好时，我可能想要运行一些代码.假设我将其放在Rails 3.1生成的users.js文件的$(document).ready(function() {...});中.

For example, when working with my User model, I may have some code that I want to have run when the document is ready. Let's say I put that in $(document).ready(function() {...}); in the users.js file generated by Rails 3.1.

第二天，我正在使用Pet模型，并且已经准备好要与文档一起运行的代码.我把它放在Rails准备的pets.js文件中的另一个$(document).ready(function() {...});中.

The next day, I'm working with the Pet model and I have code that I want to run with the document is ready. I put that in another $(document).ready(function() {...}); inside of the pets.js file that Rails prepares.

在这里出现我的问题:

1. 应用运行时如何编译?
2. 我是否使用上面的示例实例化了两个jQuery实例?
3. 我应该只在应用程序中使用一次$(document).ready(function() {...});还是Rails会将我的代码编译到一个调用中?
4. 特定于模型的.js文件属于什么?
5. 在开发和生产模式下执行方式之间是否有区别?

1. How does that compile when the app runs?
2. Am I instantiating two jQuery instances with the example above?
3. Should I only use $(document).ready(function() {...}); once in the app or does Rails compile my code into a single call?
4. What belongs in the model-specific .js files?
5. Are there differences between how it will execute in development and production modes?

推荐答案

1)编译:Rails资产管道仅将所有javascript文件合并为一个大文件.

1) Compilation: Rails assets pipeline just combines all javascript files in one big file.

2)jQuery仅加载一次，您具有多个$(document).ready函数，但这不是问题

2) jquery is only loaded once, you are having multiple $(document).ready functions, but that is not a problem

3)Rails对该调用不执行任何操作，并且jQuery可以安全地处理每页更多的这些块.

3) Rails does not do anything with the call, and jQuery can safely handle more of those blocks per page.

4)您将其称为特定于模型的.js，我宁愿将其称为特定于控制器.您将属于一起的功能分组在一起.将它们联系在一起的是控制器还是模型并不重要.我们将js分成单独的文件，以使其更易于管理.

4) You call it a model-specific .js, I would rather call it controller-specific. You group functionality together that belongs together. Whether the thing that ties them together is a controller or a model really does not matter. We split our js up in separate files to make it more manageable.

5)在开发中，资产是根据每个请求进行编译的，而在生产中，资产只能进行一次.在生产中也可以将其缩小和压缩.

5) In development the assets are compiled on every request, in production it is done only once. Also in production it could be minified and compressed.

希望这会有所帮助.

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