Hi,
I''m using attachment_fu with great success, but have run into a
requirement that I''d like to solve elegantly -- but I''ve
outstripped my
ruby skills.
I have a class that returns a hash of thumbnail definitions, like so:
class Thumb
def self.get_thumbs(style)
return { :small => "100x50", :large =>
"200x100" } if style
== ''landscape''
return { :small => "50x100", :large =>
"100x200" } if style
== ''portrait''
end
end
My attachment model is defined like this:
class Photo < ActiveRecord::Base
has_attachment :content_type => :image,
:thumbnails => Thumb.get_thumbs(??????)
[...more stuff ...]
end
My photos controller has the following line:
@photo = Photo.new(params[:photo])
My question:
I''d like dynamically determine what value to set to
Thumbnail.get_thumbs
based on values set in the Photo.new constructor. Is this possible?
I''ve fooled around with attr_accessors, lambdas, etc, but, I
can''t seem
to do what I want. Is it possible to make such a run-time decision as
I''m trying to make?
Which is to say, if params[:photo][:style] = ''portrait'',
i''d like to cut
the thumbnails accordingly?
Does anyone have an elegant solution for this?
--
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Elliott Blatt wrote:> Hi, > > I''m using attachment_fu with great success, but have run into a > requirement that I''d like to solve elegantly -- but I''ve outstripped my > ruby skills. > I have a class that returns a hash of thumbnail definitions, like so: > class Thumb > def self.get_thumbs(style) > return { :small => "100x50", :large => "200x100" } if style > == ''landscape'' > return { :small => "50x100", :large => "100x200" } if style > == ''portrait'' > end > end > > My attachment model is defined like this: > > class Photo < ActiveRecord::Base > has_attachment :content_type => :image, > :thumbnails => Thumb.get_thumbs(??????) > [...more stuff ...] > end > > My photos controller has the following line: > > @photo = Photo.new(params[:photo]) > > My question: > > I''d like dynamically determine what value to set to Thumbnail.get_thumbs > based on values set in the Photo.new constructor. Is this possible? > I''ve fooled around with attr_accessors, lambdas, etc, but, I can''t seem > to do what I want. Is it possible to make such a run-time decision as > I''m trying to make? > > Which is to say, if params[:photo][:style] = ''portrait'', i''d like to cut > the thumbnails accordingly? > > > Does anyone have an elegant solution for this?A non-thread-safe solution may be: after_save ''attachment_options[:thumbnails] = Thumb.get_thumbs(style)'' has_attachment :content_type => :image, :thumbnails => Thumb.get_thumbs(''landscape'') but a better solution may be to add PortraitPhoto and LandscapePhoto sub-classes. -- Rails Wheels - Find Plugins, List & Sell Plugins - http://railswheels.com --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Mark, Wow, not one but two possible solutions. Thanks a lot. I think I like the sub-classing solution. Thank you very much, Elliott Mark Reginald James wrote:> Elliott Blatt wrote:> A non-thread-safe solution may be: > > after_save ''attachment_options[:thumbnails] = Thumb.get_thumbs(style)'' > has_attachment :content_type => :image, > :thumbnails => Thumb.get_thumbs(''landscape'') > > but a better solution may be to add PortraitPhoto and LandscapePhoto > sub-classes. > > -- > Rails Wheels - Find Plugins, List & Sell Plugins - > http://railswheels.com-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---