CODEWITHSUNDEEP
ruby-on-railsrubyscopehas-many-throughhas-scope
Serge Pedroza
Serge Pedroza

Reputation: 2170

How can I call/use my scope in my view

I am trying to use has_scope to filter all Keys that are not connected to a Room via my KeyRoomMapping Table.

I've created the scope in my Keys model, but I don't know how to call the scope in my view.

Models

class Key < ApplicationRecord  

  has_many :key_room_mappings, foreign_key: :key_id, dependent: :destroy
  has_many :rooms, through: :key_room_mappings

  ###Is this the best way to find all Keys that are not connected to a room?
  scope :without_rooms, -> { where.not(id: KeyRoomMapping.distinct.pluck(:key_id)) }

end

class KeyRoomMapping < ApplicationRecord
  belongs_to :room
  belongs_to :key

end

class Room < ApplicationRecord
  has_many :key_room_mappings, foreign_key: :room_id, dependent: :destroy
  has_many :keys, through: :key_room_mappings

end

Controller

class KeysController < ApplicationController

  has_scope :without_rooms

  def index
    @keys = apply_scopes(Key).all
  end

end

View

###How can I use my scope to filter my list below, this is not working...
<%= link_to "Keys Without Rooms", {controller: 'keys', action: 'index', without_rooms: ''} %>

  <% @keys.each do |key| %>
    <tr>
      <td><%= key.name %></td>
      <td><%= key.copy %></td>
    </tr>
  <% end %>

Upvotes: 1

Views: 734

Answers (1)

Andrey Deineko
Andrey Deineko

Reputation: 52357

Add a boolean option to has_scope, which you'll use while building the path:

# controller
has_scope :without_rooms, type: :boolean

# view
link_to "Keys Without Rooms", '/keys?without_rooms=true' # or keys_path(without_rooms: true)

Upvotes: 1

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