Link_to parameters

Rails
1

I’m trying to add paging parameters to link_to inside an
application_helper method.

def index_show_link(elm, link_text = ‘Show’)
(can?(:read, elm)) ? link_to( link_text, elm ) : ’ '.html_safe
end

I want to add the :page => params[:page] pair into the link, but I
can’t seem to find a way to add it. If I use the long-hand syntax: {:id
=> elm.id, :controller => controller_name, :action => :show, :page =>
params[:page]} then it works, but that also horses around with
friendly_id.

I’ve looked through the link_to and url_for documentation, and I can’t
see a way to pass the bare object to either method and also include the
extra parameter.

What’s the trick?

Thanks,

Walter

2

On Oct 5, 2011, at 3:48 PM, Walter Lee D. wrote:

I’m trying to add paging parameters to link_to inside an application_helper
method.

def index_show_link(elm, link_text = ‘Show’)
(can?(:read, elm)) ? link_to( link_text, elm ) : ’ '.html_safe
end

I want to add the :page => params[:page] pair into the link, but I can’t seem
to find a way to add it. If I use the long-hand syntax: {:id => elm.id,
:controller => controller_name, :action => :show, :page => params[:page]} then it
works, but that also horses around with friendly_id.

I found that substituting to_param for id makes FriendlyId work
correctly again, and this one is solved. Still seems awfully long-hand.

Walter

3

On Oct 6, 1:32pm, Walter Lee D. [email protected] wrote:

I found that substituting to_param for id makes FriendlyId work correctly again,
and this one is solved. Still seems awfully long-hand.

link_to ‘text’, blah

is a more convenient way of writing link_to ‘text’,
polymorphic_path(blah) or link_to ‘text’, blah_path(blah) (assuming
you have resources :blahs).
Both of those two _path helpers should allow you to specify extra
options (i.e. polymorphic_path(blah, :page => 2))

Fred

4

On Oct 6, 2011, at 11:59 AM, Walter Lee D. wrote:

def index_show_link(elm, link_text = ‘Show’)
is a more convenient way of writing link_to ‘text’,
polymorphic_path(blah) or link_to ‘text’, blah_path(blah) (assuming
you have resources :blahs).
Both of those two _path helpers should allow you to specify extra
options (i.e. polymorphic_path(blah, :page => 2))

So are you saying that if I’m in the application helper, I can use a
polymorphic_path, even though I am not declaring anything to be polymorphic?
That’s a new one on me.

Refactored, works great! Thanks!

Walter

5

On Oct 6, 5:09pm, Walter Lee D. [email protected] wrote:

On Oct 6, 2011, at 11:59 AM, Walter Lee D. wrote:

is a more convenient way of writing link_to ‘text’,
polymorphic_path(blah) or link_to ‘text’, blah_path(blah) (assuming
you have resources :blahs).
Both of those two _path helpers should allow you to specify extra
options (i.e. polymorphic_path(blah, :page => 2))

So are you saying that if I’m in the application helper, I can use a
polymorphic_path, even though I am not declaring anything to be polymorphic?
That’s a new one on me.

Refactored, works great! Thanks!

polymorphic_path is a rails provided method - it’s what gets called by
rails when you shorthand stuff like form_for(some_object) or link_to
‘blah’, some_other_object. It basically just looks at the class name
(probably via the activemodel::naming) stuff and then calls the
explicit path helper (comment_path etc) that it expects to exist given
what you’re asking it to do.

Fred

6

On Oct 6, 2011, at 10:27 AM, Frederick C. wrote:

Both of those two _path helpers should allow you to specify extra
options (i.e. polymorphic_path(blah, :page => 2))

So are you saying that if I’m in the application helper, I can use a
polymorphic_path, even though I am not declaring anything to be
polymorphic? That’s a new one on me.

Walter