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The better way to pass the foreign_key value to the Rails controller

You may want to consider reading the Rails Guide on nested resources: http://guides.rubyonrails.org/routing.html#nested-resources In a nutshell: routes.rb resources :galleries do resources :pictures do end # Generates the routes: /galleries/:gallery_id/pictures pictures_controller.rb def new @gallery = Gallery.find(params[:gallery_id]) @picture = Picture.new end def create @gallery = Gallery.find(params[:gallery_id]) # gallery_id is passed in the URL @picture = @gallery.build(params[:picture]) if … Read more

Rails 2 to Rails 3 : using link_to instead of link_to_remote (including remote and update)

The :update option isn’t supported by the new link_to :remote => true. You will either have to use the legacy plugin write the JS/AJAX yourself instead of using :remote => true use render :update { |page| p.replace_html … }

Using Rails link_to for links that post

The short answer is that if what you mean by “parameters” is form fields, then you simply can’t do this (at least not in a straightforward way that I can see). You should instead use a form with a submit button, styled to look like a link (if that’s what you want it to look … Read more

file download link in rails

Rails 4: in routes: get “home/download_pdf” in controller (already have pdf): def download_pdf send_file( “#{Rails.root}/public/your_file.pdf”, filename: “your_custom_file_name.pdf”, type: “application/pdf” ) end in controller (need to generate pdf): require “prawn” class ClientsController < ApplicationController def download_pdf client = Client.find(params[:id]) send_data generate_pdf(client), filename: “#{client.name}.pdf”, type: “application/pdf” end private def generate_pdf(client) Prawn::Document.new do text client.name, align: :center text … Read more