CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-5
santhosh kumar
santhosh kumar

Reputation: 2019

Passing options_for_select values from a model class

I am having a drop down in my rails application as below.

= form_tag({:controller=>"r4c", :action=>"result"}, method: :get) do
 = label_tag(:q, "Trip Type: ")
 = select_tag(:q, options_for_select([["Single load completed trip", "r4c_001"]]), class:"select")
 = submit_tag("Get Test Details")

As we can see, i am passing the value [["Single....]] value directly into the options_for_select. I am trying to fetch this value from another class say a model and i have created a model class.

require 'active_record'
class R4cOptionsModel < ActiveRecord::Base
 def country_options
    return [["Single load completed trip", "r4c_001"]]
 end
end

and the view form to 

= select_tag(:q, options_for_select(R4cOptionsModel.country_options), class:"select")

but i am getting a error message as

undefined method `country_options' for #

What is the correct approach to do this. Thanks for your help.

Upvotes: 0

Views: 1170

Answers (1)

Jagdeep Singh
Jagdeep Singh

Reputation: 4920

Your method country_options is defined as instance method in class R4cOptionsModel. So, either call it on an object of this class in the view:

= select_tag(:q, options_for_select(@r4c_option_model.country_options), class:"select")

Or, better if your options are more static, define the method as a class method using self:

class R4cOptionsModel < ActiveRecord::Base
  def self.country_options
    [["Single load completed trip", "r4c_001"]]
  end
end

... and keep view code as is.

Update

Define it in helper method (Recommended)

Use this approach if you need these option values only in views. Define it in ApplicationHelper or any other helper module.

module ApplicationHelper
  def country_options
    [["Single load completed trip", "r4c_001"]]
  end
end

and in views:

= select_tag(:q, options_for_select(country_options), class:"select")

Upvotes: 1

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