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Rails Params哈希如何提供给控制器方法

[英]how is rails params hash made available to controller methods

原文 2012-08-03 18:08:52 0 1 ruby-on-rails/ hash/ params

I understand the rails params hash is available in my controller methods, but I'm trying to understand how that happens. 我知道我的控制器方法中提供了rails params哈希，但是我试图了解它是如何发生的。 Is it a parameter passed to the method? 它是传递给方法的参数吗？ If so, how can we access it since controller methods don't have any declared arguments? 如果是这样，由于控制器方法没有任何声明的参数，我们如何访问它？

1 个解决方案

Its not a parameter, its actually just a 'getter' function, that is declared in https://github.com/rails/rails/blob/master/actionpack/lib/action_dispatch/http/parameters.rb 它不是参数，实际上只是一个“ getter”函数，在https://github.com/rails/rails/blob/master/actionpack/lib/action_dispatch/http/parameters.rb中声明

So calls to params[:something] is really a method call which returns a hash, from which you access the http parameters. 因此，对params [：something]的调用实际上是一个返回哈希值的方法调用，您可以从该哈希值访问http参数。

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在Rails中的方法中传递参数Hash - Passing params Hash in methods in rails

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相关问题 如何将Hash与Rails控制器的参数合并？ - How to merge Hash with Rails controller's params? 在Rails中的方法中传递参数Hash - Passing params Hash in methods in rails 参数哈希不适用于控制器方法，但在视图中可见 - params hash not available to controller method but is visible in view Rails-如何自定义某些控制器方法所需的参数？ - Rails - How to customize required params for certain controller methods? 将参数哈希设置为控制器内的变量（导轨） - Setting a params hash to a variable within the controller (rails) rails 无法将嵌套哈希传递给控制器参数 - rails cannot pass nested hash to controller params 如何修改rails控制器中的参数 - How to modify the params in rails controller 如何使用Rails Action Controller嵌套参数来允许特定属性哈希 - How to use Rails Action Controller Nested Params to Permit a Specific Attributes Hash Ruby on Rails在应用程序控制器中访问参数哈希的内容 - Ruby on rails accessing content of params hash in application controller Ruby on Rails 4-表单助手未将参数哈希传递给控制器 - Ruby on Rails 4 - Form helper not passing a params hash to controller

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