how to redirect two different url's from two different buttons from index in controller?

Question

How to redirect the two links to two urls by using single method in controller?

Example:

def index
  @location_id = Location.find(@location_id)
  @epc = Enr::Rds::CurrentEpc.find_by_location_id(@location_id)
  if # PDF EPC link clicked
    @epc.current_epc_path[-4..-1] == '.pdf'
    content = open(@epc.current_epc_path, "rb") {|io| io.read }
    send_data content, :filename => 'epc.pdf', :disposition => 'inline'
  end
  if # LIVE EPC link clicked
    @epc = Enr::Rds::XmlData.find_by_location_id(@location_id)
    redirect_to @epc.report_url
  end
end

in my view,

<%= link_to 'PDF', enr_location_current_epc_index_path(@location) %>
<%= link_to 'LIVE', enr_location_current_epc_index_path(@location) %>

in my routes

resources :current_epc, only: [:index, :show] do
  get :download, :on => :collection
end

a "button" is a submit button? this has been asked lots of times, for exemple http://stackoverflow.com/questions/3027149/how-do-i-create-multiple-submit-buttons-for-the-same-form-in-rails — tokland, Jan 17 '13 at 16:16
@tokland, Yeah, i need the same of the posted question by you. But its not a button its a link. Thanks — Sri, Jan 17 '13 at 16:18

Paulo Henrique · Accepted Answer · 2013-01-17T18:03:27.217

I would consider create 2 differente actions. One for each case. It would make your actions and your code much easier to read.

Then u would result with 3 actions. Index which would only load the initial objects, one to treat the specific id by the first logic and another link to treat the second logic.

def index
  @location_id = Location.find(@location_id)
  @epc = Enr::Rds::CurrentEpc.find_by_location_id(@location_id)
end

pdf_epc
  @location_id = Location.find(@location_id)
  @epc = Enr::Rds::CurrentEpc.find_by_location_id(@location_id)
  @epc.current_epc_path[-4..-1] == '.pdf'
  content = open(@epc.current_epc_path, "rb") {|io| io.read }
  send_data content, :filename => 'epc.pdf', :disposition => 'inline'
end

def live_epc
  @epc = Enr::Rds::XmlData.find_by_location_id(@location_id)
  redirect_to @epc.report_url
end

in your routes

resources :current_epc, only: [:index, :show] do
  get :download, :on => :collection
end
get "/pdf_epc/:id" => "current_epc#pdf_epc", :as => enr_location_current_epc_pdf
get "/live_epc/:id" => "current_epc#live_epc", :as => enr_location_current_live_epc

in your view

<%= link_to 'PDF', enr_location_current_epc_pdf_path(@location) %>
<%= link_to 'LIVE', enr_location_current_live_epc_path(@location) %>

how to give the path name to the links in view for the different private actions in controller? — Sri, Jan 17 '13 at 17:50
It doens't have to be private actions. i will edit my answer! — Paulo Henrique, Jan 17 '13 at 17:51
It's looks very neat and cool. But, how to link to(path name or method name) pdf_epc and live_epc? — Sri, Jan 17 '13 at 17:56

Louis XIV · Answer 2 · 2013-01-17T17:37:22.960

def pdf_url
    if (params[:url] == 1)
        do something
    else
        do something else
    end
    @epc = Enr::Rds::CurrentEpc.find_by_location_id(@location_id)
    if @epc != nil
      @epc.current_epc_path[-4..-1] == '.pdf'
      content = open(@epc.current_epc_path, "rb") {|io| io.read }
      send_data content, :filename => 'epc.pdf', :disposition => 'inline'
    end
end

In your routes.rb:

match "/anything/pdf_url/:url" => "anything#pdf_url"

And your two links:

<%= link_to "first", "/anything/pdf_url/1" %>
<%= link_to "second", "/anything/pdf_url/2" %>

EDIT: member is used when it requires an :id parameter, if not it is a collection. Anyway, I would use match in that case like (which is in parenthesis is optional):

 match "/anything(/download/:url)" => "anything#index"

and get the parameter in your controller like this:

def index
    if params[:url] == 1 # Or whatever you put in your link_to
        # redirect_to url 
    else
        # redirect_to url
    end
end

EDIT 2: Index controller:

def index

  if params[:id]
      @location_id = Location.find(params[:id])
      @epc = Enr::Rds::CurrentEpc.find_by_location_id(@location_id)
      if params[:url] == 'pdf'
        @epc.current_epc_path[-4..-1] == '.pdf'
        content = open(@epc.current_epc_path, "rb") {|io| io.read }
        send_data content, :filename => 'epc.pdf', :disposition => 'inline'
      elsif params[:url] == 'live'
        @epc = Enr::Rds::XmlData.find_by_location_id(@location_id)
        redirect_to @epc.report_url
      end
  else
    @locations = Location.all
    respond_to do |format|
      format.html  
      format.json  { render :json => @locations }
    end
  end
end

Your routes:

match "/anything(/:id(/:url))" => "anything#index"

Your view (change links to fit your tastes, it's just a simple example):

<%= link_to "first", "/anything/1/pdf" %>
<%= link_to "second", "/anything/1/live" %>

I updated my question... Please suggest me to do in the routes. — Sri, Jan 17 '13 at 16:36
Don't get what's is unclear for you? Just add a param to your url and make a conditional render in the action with this param. Am I off the subject? — Louis XIV, Jan 17 '13 at 16:43
Nope, I am unclear with the routes. I post my routes in the question. — Sri, Jan 17 '13 at 16:45
hi sorry Louis.. I edited the question again. Please have a look — Sri, Jan 17 '13 at 17:25

how to redirect two different url's from two different buttons from index in controller?

Example:

2 Answers2