[rspec-users] How to spec an attachment_fu model

aslak hellesoy aslak.hellesoy at gmail.com
Wed Aug 22 12:52:57 EDT 2007


On 8/22/07, Matt Lins <mlins at webinforem.com> wrote:
>
>  Sorry, attachment_fu is a plugin for handling binary data. It handles
> storing the file in the file system and storing some helpful data in the
> database about the file.
>
>  The previous code is from the attachment_fu  plugin(no, I didn't modify
> it). This property

What property? The :filename property?

> needs to be satisfied in order for the model to validate.
> So I need to get my model to validate in the spec so I can actually test
> other parts of my model. Here is my model:
>

Can't you just set the filename property directly from your spec
without going through attachment kung fu?

Aslak

>  class Picture < ActiveRecord::Base
>
>    has_and_belongs_to_many :products
>
>    has_attachment :content_type => 'image/jpeg',
>                   :storage => :file_system,
>                   :max_size => 3.megabytes,
>                   :resize_to => '400x400>',
>                   :thumbnails => {:medium => '200x200>', :small =>
> '100x100>'},
>                   :path_prefix => 'images/products'
>
>    validates_as_attachment
>
>    validates_uniqueness_of :filename
>    validates_presence_of :filename
>
>    def before_update
>      self.thumbnails.each do |t|
>        t.filename= thumbnail_name_for(t.thumbnail)
>        t.save
>      end
>    end
>
>    def full_filename(thumbnail = nil)
>      file_system_path = (thumbnail ? thumbnail_class :
> self).attachment_options[:path_prefix].to_s
>      File.join(RAILS_ROOT, 'public/external', file_system_path,
> thumbnail_name_for(thumbnail) + '.jpg')
>    end
>
>    def public_image
>      self.public_filename
>    end
>
>  end
>
>
>  aslak hellesoy wrote:
>  On 8/22/07, Matt Lins <mlins at webinforem.com> wrote:
>
>
>  First off, I'm not trying to spec attachment_fu, I know it's been tested.
>
>  But, I added some code to that model that I do need to test. Basically, I
> need to somehow fulfill the "uploaded_data" property so I can actually run
> my tests(otherwise they fail because of validations). The "uploaded_data"
> field is what would grab the multipart data from form. Here it is:
>
>  # This method handles the uploaded file object. If you set the field
> name to uploaded_data, you don't need
>  # any special code in your controller.
>  #
>  # <% form_for :attachment, :html => { :multipart => true } do |f|
> -%>
>  # <p><%= f.file_field :uploaded_data %></p>
>  # <p><%= submit_tag :Save %>
>  # <% end -%>
>  #
>  # @attachment = Attachment.create! params[:attachment]
>  #
>  # TODO: Allow it to work with Merb tempfiles too.
>  def uploaded_data=(file_data)
>  return nil if file_data.nil? || file_data.size == 0
>  self.content_type = file_data.content_type
>  self.filename = file_data.original_filename if
> respond_to?(:filename)
>  if file_data.is_a?(StringIO)
>  file_data.rewind
>  self.temp_data = file_data.read
>  else
>  self.temp_path = file_data.path
>  end
>  end
>
>
>  I'm not familiar with attachment_fu - is this code from attachment_fu
> that you have modified? Or is it your code entirely? Attachment_fu's
> entirely? Where does this code come from?
>
> Aslak
>
>
>
>  While I was digging I found out that "file_data" is a ruby Tempfile object.
> So, I tried to create a dummy file and pass it, but it failed. I found out
> in the CGI library, it actually extends the Tempfile object and adds some
> methods/properties. It started to get messy, so I thought I'd ask for
> advice.
>
>  How can I create a valid attachment_fu model spec(so I can start tweaking
> it to test my other validations)?
>
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