Rails - link_to helper with data-* attribute [duplicate]

Question

Possible Duplicate:
Best way to use html5 data attributes with rails content_tag helper?

How can I use html5 data-* attrubute in my link_to helper (Rails)

The API says that I have to use this format link_to(body, url, html_options = {}) but I have an error when I put it in html_options

Ex:

link_to "whatever", @whatever_path, { class: 'my_class', data-tooltip: 'what I want' } 

Answer 1

Just pass them in... Rails has a default :data hash

= link_to body, url, :data => { :foo => 'bar', :this => 'that' } 

One gotcha - you must surround symbols with quotes if they include a dash:

:data => { :'foo-bar' => 'that' } 

Update: In Rails 4, underscores are automatically converted to dashes, so you can do this:

:data => { :foo_bar => 'that' } 

Alternatively you can just write it directly:

= link_to body, url, :'data-foo' => 'bar', :'data-this' => 'that' 

Update 2: As pointed out in the comments, Ruby 1.9+ allows this syntax, which is now the preferred formatting:

{ data: { foo: "bar" } }