CODEWITHSUNDEEP
ruby-on-railsrubyactiverecordruby-on-rails-4rails-activerecord
Wazery
Wazery

Reputation: 15863

Rails Associations Technique

I have a User model in which their are two booleans for admin and manager statuses, each manager can have only one job created, and each job can have many managers. I made a model for the jobs which have its attributes. I need a way to handle the relationship between the manager user and the job model. My problem here is that I don't need users with admin or without manager statuses to have a relationship with the job model, how to accomplish that?

Upvotes: 0

Views: 28

Answers (2)

Kaleidoscope
Kaleidoscope

Reputation: 3627

class User
  attr_accessible :is_admin, :is_manager, job_id

  belongs_to :job
  validate :only_manager_belongs_to_job

  private

  def only_manager_belongs_to_job
    if !is_manager && job_id
      errors.add(:job_id, "Only a manager can have a job")
    end
  end
end

class Job
  has_many :managers, class_name: "User"
end

STI is overkill for this (and most other things it's used for).

Upvotes: 1

usha
usha

Reputation: 29349

Have you thought about Single Table Inheritance?. You will have to add type column and job_id column to users table

class User < ActiveRecord::Base
end

class Manager < User
  belongs_to :job
end

class Admin < User
end

class Job < ActiveRecord::Base
  has_many :managers
end

Upvotes: 1

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