CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-4checkboxlist
user4965201
user4965201

Reputation: 973

Rails multiple checkbox for category selection

I have a form to create events and also i have a model for category selection

the event model is given by 

class Event < ActiveRecord::Base
  belongs_to :category
end

and i have t.belongs_to :category in the event migration and i have t.string :name in the category migration

i have done this so as to select a single category for the event

but now i also want to select the multiple interest for the event and their names must be fetched from the category table so as to store the category_id in another column(interest) in the events table.

I am doing it so as to find users who belongs to the same category (i have also included category id in the user table )

please tell me how it can be done ? thanks in advance

UPDATE 1 - actually i want to store the interest in category for the event like the event belongs to arts category and it needs to find users and other events who belongs to arts, commerce, science etc .... this is interest of the event

UPDATE 2 - so that in its show view i can fetch the users and other events who belongs to the category which the events has in its interests

Upvotes: 0

Views: 1906

Answers (1)

Hristo Georgiev
Hristo Georgiev

Reputation: 2519

It's a little bit of a hacky workaround to do this, but it is possible:

Model

In your model add:

  class Event < ActiveRecord::Base
        serialize :interests
      
    end

View

Given that @categories contains all the categories, you can make checkboxes of interests like this (put this in your view for the event):

   <tbody>
      <% @categories.each do |category| %>
      <tr>
        <td><%= check_box_tag "interests[]", category.id %></td>
      </tr>
      <% end %>
    </tbody>

Controller

When you submit the form, you will receive them in this format:

"interests[]"=>["3", "4", "5"]

You can reach those values by using params[:event][:interests] or params[:interests] , depending if the form is wrapped or not. You can check the parameters in your terminal, when you post the form.

In the first case, the results will be automatically sent to the model, but in the second case, where you have only params[:interests] you need to manually assign them upon creation, like this:

   @event.interests = params[:interests]

Eitherway, you are trying to get an array in a column, so you need to serialize it. That's why there's a serialize in the model. Additionally, you have to have your column value as a text (t.text) , not as a string.

In theory, each time you reach Event.interests , you will get an array which you can iterate through with each

Upvotes: 2

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