Module: CarrierWave::Mongoid
- Includes:
- Mount
- Defined in:
- lib/carrierwave/mongoid.rb
Instance Method Summary collapse
-
#mount_uploader(column, uploader = nil, options = {}, &block) ⇒ Object
See CarrierWave::Mount#mount_uploader for documentation.
Instance Method Details
#mount_uploader(column, uploader = nil, options = {}, &block) ⇒ Object
See CarrierWave::Mount#mount_uploader for documentation
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# File 'lib/carrierwave/mongoid.rb', line 14 def mount_uploader(column, uploader=nil, ={}, &block) field [:mount_on] || column super alias_method :read_uploader, :read_attribute alias_method :write_uploader, :write_attribute public :read_uploader public :write_uploader include CarrierWave::Validations::ActiveModel validates_integrity_of column if uploader_option(column.to_sym, :validate_integrity) validates_processing_of column if uploader_option(column.to_sym, :validate_processing) after_save :"store_#{column}!" before_save :"write_#{column}_identifier" after_destroy :"remove_#{column}!" before_update :"store_previous_model_for_#{column}" after_save :"remove_previously_stored_#{column}" class_eval <<-RUBY, __FILE__, __LINE__+1 def #{column}=(new_file) column = _mounter(:#{column}).serialization_column # mongoid won't upload a new file if there was no file previously. write_uploader(column, '_old_') if self.persisted? && read_uploader(column).nil? send(:"\#{column}_will_change!") super end def remove_#{column}=(arg) column = _mounter(:#{column}).serialization_column send(:"\#{column}_will_change!") super end def remove_#{column}! super unless respond_to?(:paranoid?) && paranoid? && flagged_for_destroy? end # Overrides Mongoid's default dirty behavior to instead work more like # ActiveRecord's. Mongoid doesn't deem an attribute as changed unless # the new value is different than the original. Given that CarrierWave # caches files before save, it's necessary to know that there's a # pending change even though the attribute value itself might not # reflect that yet. def #{column}_changed? changed_attributes.has_key?("#{column}") end # The default Mongoid attribute_will_change! method is not enough # when we want to upload a new file in an existing embedded document. # The custom version of that method forces the callbacks to be # ran and so does the upload. def #{column}_will_change! changed_attributes["#{column}"] = '_new_' end def find_previous_model_for_#{column} if self.embedded? ancestors = [[ self.metadata.key, self._parent ]].tap { |x| x.unshift([ x.first.last.metadata.key, x.first.last._parent ]) while x.first.last.embedded? } first_parent = ancestors.first.last reloaded_parent = first_parent.class.unscoped.find(first_parent.to_key.first) association = ancestors.inject(reloaded_parent) { |parent,(key,ancestor)| (parent.is_a?(Array) ? parent.find(ancestor.to_key.first) : parent).send(key) } association.is_a?(Array) ? association.find(to_key.first) : association else self.class.unscoped.for_ids(to_key).first end end def serializable_hash(options=nil) hash = {} except = options && options[:except] && Array.wrap(options[:except]).map(&:to_s) only = options && options[:only] && Array.wrap(options[:only]).map(&:to_s) self.class.uploaders.each do |column, uploader| if (!only && !except) || (only && only.include?(column.to_s)) || (except && !except.include?(column.to_s)) hash[column.to_s] = _mounter(column.to_sym).uploader.serializable_hash end end super(options).merge(hash) end RUBY end |