Unique id per page (controller)

Rails
1

is there a ways to get a unique id (number) which is unique for each
executing page … sometimes i need a unique number to identify html
elements in order to access them later with javascript.

i would like to call

some hints?

2

You could always use the controller and action name.

First, make a helper method within helpers/application_helper.rb

def page_id
“#{controller.controller_name}_#{controller.action_name}”
end

If you call /projects/new this will contain “projects_new”

That would be pretty unique for a page. I’m sure there are other ways to
do
that though.

Good luck!
On Dec 17, 2007 10:41 AM, Michal G. <

3

On Dec 17, 2007, at 11:08 AM, Michal G. wrote:

this should produce something like…

You could possibly do something like this:

def unique_id
key = controller_name.to_sym

if !session[key]
session[key] = 0
end

session[key] += 1
return session[key]
end

Peace,
Phillip

4

thanks brian for the quick response, but what i am looking for is a
unique id (per page) … so whenever i call unique_id it should be a
unique id … this would be just unique per action.

i need e.g.

this should produce something like…

important is that the ids are unique per page so i can call them with
javascript

5

Sure there is. You just need an instance variable.

def unique_id
@unique_id ||= 0 #use what you have in instance, or set it to 0
@unique_id += 1
end

On Dec 17, 2007 11:36 AM, Michal G. <

6

thats possible but using a session for such common task is a bit
overkill for me … there must be an easier solution …

7

By the way, if you’re doing this in a loop, there’s an easier way.

<% @projects.each_with_index do |@project |@project, index| %>

<% end %>

Or use the id of the class

<% @projects.each do |@project |@project| %>

<% end %>

or if you’re using Rails 2.0

<% @projects.each do |@project |@project| %>

<% div_for @project do %>

<% end %>

<% end %>

8

I guess you need Simply Helpful Plugin. It is now part of Rails 2.0.
Check
out this link:

On Dec 17, 2007 8:41 AM, Michal G. <

9

On Dec 17, 2007, at 12:43 PM, Brian H. wrote:

Sure there is. You just need an instance variable.

def unique_id
@unique_id ||= 0 #use what you have in instance, or set it to 0
@unique_id += 1
end

Heh, don’t know why I was thinking that the unique_id value would
need to survive page changes. The instance variable is a much better
idea.

Peace,
Phillip

10

thanks brian … thats exactly what i was looking for …
i tried quite the same but it didnt work …

module ApplicationHelper

@unique_id = 0

def unique_id
@unique_id += 1
end

end

this didnt work because a module cannot have an instance variable …
cause the helpers gets mixed in somehow…
thanks for your help …

Brian H. wrote:

Sure there is. You just need an instance variable.

def unique_id
@unique_id ||= 0 #use what you have in instance, or set it to 0
@unique_id += 1
end

On Dec 17, 2007 11:36 AM, Michal G. <