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Contents
module BitCore
# A collection of ordered Slides.
class Slideshow < ActiveRecord::Base
has_many :slides,
-> { order "position" },
class_name: "BitCore::Slide",
foreign_key: :bit_core_slideshow_id,
dependent: :destroy,
inverse_of: :slideshow
has_one :content_provider,
as: :source_content,
dependent: :nullify
validates :title, presence: true
accepts_nested_attributes_for :slides
def add(slide_params)
slide = slides.build(slide_params)
slide.position = slides.count + 1
slide
end
def remove(slide)
return false unless slide.destroy
(slide.position + 1..slides.last.position).each do |pos|
slides.find_by_position(pos).update(position: pos - 1)
end
true
end
def sort(ordered_ids)
self.class.transaction do
self.class.connection.execute "SET CONSTRAINTS " \
"bit_core_slide_position DEFERRED"
ordered_ids.each_with_index do |id, idx|
slides.find(id).update_attribute(:position, idx + 1)
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems