Handling query string with rails

Question

A complete rails beginner here. How do I go about handling a query string in rails? For example for: www.something.com/movie?sort=title

For implementing the the view in the haml file, how can I make it so that clicking on Movie title will send that query string, And more importantly how do I handle it. Where should I implement the function which can access that query string using :params .

I have been on this for more than a day now and could not understand whether that query string will call a controller function or a module from helper.

I hope I was clear enough about the question. Any help will be appreciated.

PS:- there is a movie table with title as one of its column.

Answer 1

Not sure I really understand what you want. Does this suit you?

link_to "My Link", movie_index_path(sort: :title)

Then access param with params[:sort] ?

(Accord movie_index_path with your routes configuration)

Answer 2

Since your question is not focused let me assume part of your problem.

Assumptions

1. You have a controller name movies_controller.rb in app/controllers/
2. folder You have a model named movie.rb in app/models folder

Then you should tell Rails to route requests with path /movies to movies_controller.rb. This can be done by adding the below lines in config/routes.rb

resources :movies

The if you call www.something.com/movies this will invoke the method index in movies_controller.rb. So you should write some code to display movies here.

class MoviesController < ApplicationController
 def index
   @movies = Movie.all
 end
end

Then you should use app/views/movies/index.haml file to display the movies. There give a link to sort the movies by title.

link_to "Sort by title", movies_path(:sort=>"title")

No when click on the link the user will reach the same index method with params now. You can get the sort value like below.

params[:sort]

SO to support sorting you need to change the controller code little bit.

class MoviesController < ApplicationController
 def index
  if params[:sort]
   @movies = Movie.order('#{params[:sort]} ASC')
  else
    @movies = Movie.all
  end
 end 
end

I strongly suggest you to go through the http://guides.rubyonrails.org/index.html before asking question.