I want to create an instance variable in a controller to be used in the view:
我想在控制器中创建一个实例变量，以便在视图中使用：
foo = "bar"
instance_variable_set("#{foo}", "cornholio")
In the view, use @bar so that:
在视图中，使用@bar以便：
@bar => "cornholio"
This generates an error: 'bar' is not allowed as an instance variable name
这会产生错误：'bar'不允许作为实例变量名称
Working in Rails 3.1
在Rails中工作3.1
2 个解决方案
#1
35
This instance_variable_set("#{foo}", "cornholio") needs to read instance_variable_set("@#{foo}", "cornholio")
这个instance_variable_set（“＃{foo}”，“cornholio”）需要读取instance_variable_set（“@＃{foo}”，“cornholio”）
Based on this post. Just tried it in my irb for Ruby 1.93; the post is from 2009.
基于这篇文章。刚刚在我的irb中尝试过Ruby 1.93;这篇文章是2009年的。
#2
7
In Ruby, instance variable names always have to start with an @ sigil.
在Ruby中，实例变量名称始终必须以@sigil开头。
#1
35
This instance_variable_set("#{foo}", "cornholio") needs to read instance_variable_set("@#{foo}", "cornholio")
这个instance_variable_set（“＃{foo}”，“cornholio”）需要读取instance_variable_set（“@＃{foo}”，“cornholio”）
Based on this post. Just tried it in my irb for Ruby 1.93; the post is from 2009.
基于这篇文章。刚刚在我的irb中尝试过Ruby 1.93;这篇文章是2009年的。
#2
7
In Ruby, instance variable names always have to start with an @ sigil.
在Ruby中，实例变量名称始终必须以@sigil开头。