Method: Decidim::ContentBlock#images_container

Defined in:
decidim-core/app/models/decidim/content_block.rb

#images_container ⇒ Object

Public: Holds access to the images related to the content block. This method generates a dynamic class that encapsulates the uploaders for the content block images, and eases the access to them. It is a little bit hacky, but it is the only way I could come up with in order to let content block images have different uploaders.

Examples:

# This will process the image with the uploader defined at the
# manifest, upload it and save the record.
content_block.images_container.my_image = params[:my_image]
content_block.save!

# This is how you can access the image data, just like with any other
# uploader field. You can use the uploader variants too.
content_block.images_container.attached_uploader(:my_image).url
content_block.images_container.attached_uploader(:my_image).variant_url(:big)

# This will delete the attached image
content_block.images_container.my_image = nil
content_block.save!

Returns an object that responds to the image names defined in the content block manifest.



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# File 'decidim-core/app/models/decidim/content_block.rb', line 72

def images_container
  return @images_container if @images_container

  attachments = manifest_attachments

  @images_container = Class.new do
    include ActiveModel::Validations
    include Decidim::HasUploadValidations

    cattr_accessor :manifest_attachments
    attr_reader :content_block

    def self.name
      to_s.camelize
    end

    delegate :id, :organization, to: :content_block

    def initialize(content_block)
      @content_block = content_block
    end

    attachments.each do |name, attachment|
      validates_upload name, uploader: attachment.uploader

      define_method(name) do
        attachment.file
      end

      define_method("#{name}=") do |file|
        attachment.file = file
      end
    end

    def attached_uploader(name)
      return if manifest_attachments[name].blank?

      manifest_attachments[name].attached_uploader(:file)
    end

    def save
      return unless content_block.persisted?

      manifest_attachments.values.map(&:save).all?
    end
  end

  @images_container.manifest_attachments = manifest_attachments
  @images_container = @images_container.new(self)
end