fake_model.rb

# Include this module into your fake models to get some helpful default functionality.
#
# Example usage:
#
#     class AuxiliaryOfficer
#       include FakeModel
#
#       attr_accessor :name, :started_on, :comments
#
#       def self.fake_attributes
#         {
#             name: Faker::Name.name,
#             started_on: 1.year.ago.to_date,
#             comments: Faker::Lorem.paragraph
#         }
#       end
#
#       has_many :events
#       belongs_to :user
#     end
#
module FakeModel
  extend ActiveSupport::Concern

  included do
    include ActiveModel::Model
    extend ActiveModel::Callbacks
    extend ActiveModel::Naming

    attr_accessor :persisted
  end

  module ClassMethods

    # Override this in your class to provide the default faker attributes
    # for your class.
    def fake_attributes
      {}
    end

    # Generate one fake object of this class
    def fake(params={})
      new(fake_attributes.merge(params))
    end

    # Generate several fake objects of this class
    def fakes(count=10, params={})
      count.times.collect { fake(params) }
    end

    # Declare a belongs_to relationship that returns a fake of the other class
    def belongs_to(attribute_name)
      define_method attribute_name do
        attribute_name.to_s.classify.constantize.fake
      end
    end

    # Declare a has_many relationship that returns several fakes of the other class
    def has_many(plural_attribute_name)
      define_method plural_attribute_name do
        plural_attribute_name.to_s.singularize.classify.constantize.fakes
      end
    end
  end

  # Assign this object's #persisted= method if you want to change this result
  def persisted?
    @persisted.nil? ? false : @persisted
  end

end