Module: Services::MdsUploadContent::ClassMethods

Defined in:
app/models/services/mds_upload_content.rb

Instance Method Summary collapse

Instance Method Details

#mds_upload_content(attr_name, args = {}) ⇒ Object

Specify that there is a file attachment associated with this model.

attr_name - the name of the parameter in the request that contains the file upload.
args       - a hash of options to control operations. Valid options include:

     :max_size => { :size => size-in-bytes,
                    :message => 'Error message if size exceeded' }

If :size is not specified, a default of 5.megabytes is used If :message is not specified, a default message of “uploaded file exceedes maximum of #{args[:size] bytes” is used

:presence => { :message => 'Error message if upload not provided.' }

If :message is not specified, a default message of “no file upload provided”

:name_match => { :regex => regular expression for file name to match,
                 :message => 'Error message if upload not provided.' }

If :regex is not specified, all names will match. If :message is not specified, a default message of “uploaded file name does not match regular expression”.

:file_type => { :message => 'Error message if no match on file type',
                :regex => regular expression for the results of 'file -b --mime' to match }

If :message is not specified, a default message of “unexpected upload file type” If :regex is not specified, then there will be no check of the file type.



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# File 'app/models/services/mds_upload_content.rb', line 35

def mds_upload_content(attr_name, args={})
  
  # Define the setter method for the upload file.
  define_method("#{attr_name}=".to_sym) do | upload_file |
    return if upload_file.nil?
    self.original_file_name = File.basename(upload_file.original_filename)
    self.content_type = upload_file.content_type
    self.size = upload_file.size
    @upload_file = upload_file
  end

  define_method("clear_#{attr_name}".to_sym) do
    @upload_file = nil
  end

  define_max_size_validation(attr_name, args[:max_size]) if args.has_key?(:max_size)

  define_presence_validation(attr_name, args[:presence]) if args.has_key?(:presence)

  define_name_match_validation(attr_name, args[:name_match]) if args.has_key?(:name_match)

  define_file_type_validation(attr_name, args[:file_type]) if args.has_key?(:file_type)

  before_create :construct_file_contents
end