Rails 3 - Custom link_to helper (with default class and ability to add classes)

Question

I'm trying to hook up a custom helper that has a default class 'pjax' but also retains an ability to add classes where need be.

Example:

link_to_pjax('pagename', page_path, :class => 'current')

So the helper would add the 'pjax' by default, and also the class 'current', or whatever is passed in.

def link_to_pjax(name, path, options = {:class => 'pjax'})
    link_to(name, path, options)
end

The syntax is freaking me out. Any advice would be much appreciated.

So in your example, are you looking to have it override the default class of 'pjax' or add the 'current' class to the 'pjax' class (eg: 'current pjax')? — Preacher, Dec 23 '11 at 01:43

Damien · Accepted Answer · 2011-12-23T03:53:16.743

6

def link_to_pjax(name, path, options)
  options[:class] += ' pjax'
  link_to(name, path, options)
end

edit

After test, it's much less elegant:

 def link_to_pjax(name, path, options = {})
   options[:class] ? options[:class] += ' pjax' : options[:class] = 'pjax'
   link_to(name, path, options)
 end

My first solution works but only if you have still specified a class.

The latest works in all cases:

link_to_pjax 'click me', my_super_path, class: 'ahah', id: 'hello'
link_to_pjax 'click me', my_super_path
etc

My bad...

edited Dec 23 '11 at 03:53

answered Dec 23 '11 at 01:48

Damien

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Thanks for that. How can I get it to work if no :class is specified on the original link_to? – Galaxy Dec 23 '11 at 02:04
I love it. Simple, and makes perfect sense. Thanks! – Galaxy Dec 23 '11 at 02:08
The last link_to in the answer should use (name, path, options) instead of (text, url, options). – mahemoff Dec 23 '11 at 03:50

score 1 · Answer 2 · answered Jul 16 '12 at 16:30

I improved Delba answer to handle block version of link_to:

def link_to_pjax(*args, &block)
  if block_given?
    options      = args.first || {}
    html_options = args.second
    link_to_pjax(capture(&block), options, html_options)
  else
    name         = args[0]
    options      = args[1] || {}
    html_options = args[2] || {}
    html_options[:class] ? html_options[:class] += ' pjax' : html_options[:class] = 'pjax'
    link_to(name, options, html_options)
  end
end

score 1 · Answer 3 · answered Dec 23 '11 at 01:42

1

def link_to_pjax(name, path, options={})
  default_options = { :class => "pjax" }
  link_to(name, path, options.merge(default_options))
end

answered Dec 23 '11 at 01:42

Federico Builes

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I have that a whirl, and while it added the 'pjax' class, it seemed to strip my class on the initial link_to – Galaxy Dec 23 '11 at 01:52
My bad, I misunderstood the problem. @Delba's solution should do what you want. – Federico Builes Dec 23 '11 at 01:56

Rails 3 - Custom link_to helper (with default class and ability to add classes)

3 Answers3