simple_form_stuff

simple_form_stuff.rb

####TO CREATE A BOOLEAN VIRTUAL ATTRIBUTE WITH VALIDATION:

##In the model:

class Person < ActiveRecord::Base
  validates_acceptance_of :terms_of_service
  #if using attr_accessible
  attr_accessible :name, :etc, :terms_of_service

end


##In the view:
  = f.input :terms_of_service, as: :boolean, required: true

####TO CREATE A (non-boolean) VIRTUAL ATTRIBUTE WITH VALIDATION IN SIMPLE_FORM:

##In the model:

class Person < ActiveRecord::Base
  attr_accessor :nickname
  validates_presence_of :email, :first_name, :nickname

  #if using attr_accessible
  attr_accessible :name, :etc, :nickname

end

##In the view:
  = f.input :nickname

####TO VALIDATE A SIMPLE ASSOCIATION IN SIMPLE_FORM:

##In the model:

class LineItem < ActiveRecord::Base
  belongs_to :order
  validates_presence_of :order_id
end

####TO VALIDATE A CUSTOM THING IN SIMPLE_FORM:

##In the model:
class Person < ActiveRecord::Base
  validates :name_cannot_be_fake

  def name_cannot_be_fake
    errors.add(:first_name, "can't be so fake") if self.first_name.downcase.include?("fake")
  end
end

####TO VALIDATE A HAS AND BELONGS TO MANY IN SIMPLE_FORM:

##In the model:
class Person < ActiveRecord::Base
  has_and_belongs_to_many :roles
  validate :must_have_a_role

  def must_have_a_role
    errors.add(:roles, "We need at least 1 role") if self.roles.size == 0
  end
end

##In the view:
  = f.association :roles