我刚刚开始使用我的第一个Ruby on Rails web应用程序。我有很多不同的模型,视图,控制器等等。
我想找到一个好地方粘真正的全局常数的定义,适用于我的整个应用程序。特别是,它们适用于我的模型的逻辑,并在我的视图中所做的决定。我找不到任何DRY的地方来放置这些定义,它们既适用于我的所有模型,也适用于我的所有视图。
举个具体的例子,我想要一个常量colors = ['white', 'blue', 'black', 'red', 'green']。这在模型和视图中都被广泛使用。我可以在哪里只在一个地方定义它,以便它是可访问的?
我的尝试:
Constant class variables in the model.rb file that they're most associated with, such as @@COLOURS = [...]. But I couldn't find a sane way to define it so that I can write in my views Card.COLOURS rather than something kludgy like Card.first.COLOURS. A method on the model, something like def colours ['white',...] end - same problem. A method in application_helper.rb - this is what I'm doing so far, but the helpers are only accessible in views, not in models I think I might have tried something in application.rb or environment.rb, but those don't really seem right (and they don't seem to work either)
是否没有办法定义从模型和视图都可以访问的东西?我的意思是,我知道模型和视图应该是分开的,但在某些领域,它们肯定会有需要引用相同的领域特定知识的时候?