Module: HasImage::ClassMethods

Defined in:
lib/has_image.rb

Instance Method Summary collapse

Instance Method Details

#has_image(options = {}) ⇒ Object

Options

  • :resize_to - Dimensions to resize to. This should be an ImageMagick geometry string. Fixed sizes are recommended.
  • :thumbnails - A hash of thumbnail names and dimensions. The dimensions should be ImageMagick geometry strings. Fixed sized are recommended.
  • :auto_generate_thumbnails - Flag to indicate whether to automatically generate thumbnails when the image_data changes (e.g. on create). If you set this to false, your application code needs to take care of generating thumbnails, e.g. using #generate_thumbnail
  • :delete - Flag to indicate if the images should be deleted from the storage (e.g. the filesystem) when the record is destroyed.
  • :min_size - Minimum file size allowed. It's recommended that you set this size in kilobytes.
  • :max_size - Maximum file size allowed. It's recommended that you set this size in megabytes.
  • :base_path - Where to install the images.
  • :path_prefix - Where to install the images, relative to basepath.
  • :convert_to - An ImageMagick format to convert images to.
  • :output_quality - Image output quality passed to ImageMagick.
  • :invalid_image_message - The message that will be shown when the image data can't be processed.
  • :image_too_small_message - The message that will be shown when the image file is too small. You should ideally set this to something that tells the user what the minimum is.
  • :image_too_big_message - The message that will be shown when the image file is too big. You should ideally set this to something that tells the user what the maximum is.


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# File 'lib/has_image.rb', line 169

def has_image(options = {})
  options.assert_valid_keys(HasImage.default_options_for(self).keys)
  options = HasImage.default_options_for(self).merge(options)
  class_attribute :has_image_options
  self.has_image_options = options

  after_create :install_images
  after_save :update_images
  after_destroy :remove_images

  validate :image_data_valid?, :on => :create

  include ModelInstanceMethods
  extend  ModelClassMethods

end