I would like to know how would you display the values of multiple checkboxes in a view? Below is an example of what am talking about.
<% ExamPaper.all.each do |key, val| %>
<%= f.check_box :exam_type, {:multiple => true}, key.exam_name, :class => 'exam_type'%>
<%= key.exam_name %>
<% end %>
In my view i tried displaying the items that were saved in the database like this;
<%= exam.exam_type %>
and nothing is shown. How would i display the saved items in a rails view?
Thanks..
ExamPaper.all.each will allow you to loop over instances of ExamPaper rather than a |key, val| pair. It's not entirely clear whether you want to loop over exam papers or some other class called ExamType to select a type for the papers.
My guess is you want something closer to:
<% ExamPaper.all.each do |paper| %>
<%= f.check_box :exam_type, { :multiple => true, :class => 'exam_type' }, paper.id %>
<%= paper.name %>
<% end %>
Assuming that your exam_papers have a name and an id attribute.
It's in the Exam view where I want to display the multiple exam_types chosen by a user
This is really about ActiveRecord Associations:
#app/models/user.rb
Class User < ActiveRecord::Base
has_many :exam_types
has_many :exams, through: :exam_types
end
#app/models/exam.rb
Class Exam < ActiveRecord::Base
has_many :exam_types
has_many :users, through: :exam_types
end
#app/models/exam_types.rb
Class ExamType < ActiveRecord::Base
belongs_to :exam
belongs_to :user
end
#app/controllers/exams_controller.rb
def show
@exam = current_user.exams.find(params[:id])
end
#app/views/exams/show.html.erb
<% @exam.exam_types.each do |exam_type| %>
<%= exam_type %>
<% end %>