Yu-Chieh’s Blog (Y.C. Chang)

Ruby on Rails / Rubygems / FullStack / Git / Mac notes.

Rails Tips: Link_to Helper for params.merge

  • To preserve the params of url I did this:
app/views/index.html.erb
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...

<%= link_to 'Foot type', url_for(params.merge(foot_type_id: value)) %>
...
app/controllers/recipes_controller.rb
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...
  def index
    @recipes = Recipe.where(nil)
    @recipes = @recipes.food_type_of(params[:food_type_id]) if (params[:food_type_id])
    @recipes = @recipes.food_preference_of(params[:food_preference_id]) if (params[:food_preference_id])
    @recipes = @recipes.cuisine_of(params[:cuisine_id]) if (params[:cuisine_id])
  end
...

alternative solutions

http://filterrific.clearcove.ca
http://www.lauradhamilton.com/how-to-filter-by-multiple-options-filterrific-rails
https://github.com/plataformatec/has_scope

[reference]

http://apidock.com/rails/v3.2.13/ActionView/Helpers/UrlHelper/url_for http://stackoverflow.com/questions/6625293/how-to-add-parameters-to-current-url-in-rails
http://www.justinweiss.com/blog/2014/02/17/search-and-filter-rails-models-without-bloating-your-controller/
http://guides.rubyonrails.org/active_record_querying.html#scopes

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