CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-4activerecord
Jose
Jose

Reputation: 63

Accessing Attributes from different Model

I have two models in a has_many relationship:

  1. User (has_many :vacations)
  2. Vacation (belongs_to: user)

I am trying to display a User's credits attribute in the Vacation index view. How do I go about it?

I have tried: <%= vacation.user.credits %>, however, I am getting an error.

What are the right steps in doing so? Does it have anything to do with the Action Controller Parameters?

User Model

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
  has_many :vacations
end

Vacation Model

class Vacation < ActiveRecord::Base
  belongs_to :user
  before_validation :calculate_days

  def calculate_days
    if from_date && to_date
      self.leave_credit = from_date.business_days_until(to_date) + 1
    end
  end

end

Upvotes: 0

Views: 116

Answers (1)

Archetype2142
Archetype2142

Reputation: 190

One approach could be using the current_user method, since you're already using devise. This would work only if credits have to be displayed only to the currently logged in user, say in the dashboard. try using <%= current_user.credits %>

You could also try 

class VacationsController < ApplicationController
  def index
    @user = User.find(params[:user_id])
    @credits = @user.credits
  end
end

Another one line approach could be

@credits = User.find(params[:user_id]).credits

Upvotes: 1

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