ransack search form in header partial: No Ransack::Search object was provided to search_form_for

Question

First of all, I\'m new to RoR, so the answer may be obvious, in which case I apologize. I\'ve looked around and haven\'t found anything that helps.

I\'m trying to have

Answer 1

As others have said, you need to utilize the ApplicationController's before_filter. Though ernie himself seems not to recommend this, the implementation is simple.

First, use the advanced Ransack options to set your path for your search thusly

#config/routes.rb
  resources :buckets do
    collection do
      match 'search' => 'buckets#search', via: [:get, :post], as: :search
    end
  end

Second, update your BucketsController to include the following custom action:

#controllers/buckets_controller.rb
  def search
    index
    render :index
  end

Nothing yet out of the ordinary. If you currently try to search you will get the error from your original question. Your definition of the variable q is correctly implemented, but you will have to move it to the ApplicationController like so:

#controllers/application_controller.rb
before_filter :set_global_search_variable

  def set_global_search_variable
    @q = Bucket.search(params[:q])
  end

Finally, update your search form to pass in the correct search options

#layouts/_header.html.erb

    <% search_form_for @q, url: search_buckets_path, html: { method: :post }  do |f| %>
      <%= f.label :name_cont %>
      <%= f.text_field :name_cont %>
      <%= f.submit %>
    <% end %>