Using @var in link_to

Question

Ruby on Rails

Gentlemen ruby, help

me I'm trying to revive the link in the _header format

<%= link_to @company.name, current_company %>

First Doper got

NoMethodError in StaticPages#about - undefined method `name' for nil:NilClass

that the Static_pages controller does not know about any Companies, and therefore it was decided to change the static pages controller to:

def home @company = Company.new end def about @company = Company.new end
And so on. This, however, did not help much - the links instead of the name look like

/companies/2

How to solve the problem? Is it possible to do this without repeating in every controller method? Thank you!

Answer 1

If you need the variable to be available in all (well, or a large number) methods, then you can do this:

before_filter :init_company
...
private

def init_company
  @company = Company.find(params[:id])
end

After that, your variable becomes available in all controller methods. In the case of rails 4, you can also replace before_filter with before_action , which will make the code more clear.
Apparently, you have quite a lot of errors: for some reason you are trying to create an object, instead of finding it. Also in the view: the second parameter in link_to must be of the form zzz_path .

Answer 2

@company = Company.find(params[:id])