Just for the sake of completeness, even though previous answers already show good enough suggestions. You can utilize Paperclip event handlers instead of Rails callbacks. In this case, size will be recalculated only when image changes. (If you’re using S3 for storage, this can save quite some time) has_attached_file :image, :styles => … after_post_process :save_image_dimensions … Read more
In Paperclip 3.0.1 you could just use the io_adapter which doesn’t require writing an extra file to (and removing from) the local file system. Paperclip.io_adapters.for(attachment.file).read
Adding file to a model is dead simple. For example: @post = Post.new @post.attachment = File.new(“test/fixtures/sample_file.png”) # Replace attachment= with the name of your paperclip attachment In that case you should put the file into your test/fixtures dir. I usually make a little helper in my test_helper.rb def sample_file(filename = “sample_file.png”) File.new(“test/fixtures/#{filename}”) end Then @post.attachment … Read more
For what it’s worth, as of Rails 4.0.2, #update returns false if the update failed, not simply the object which the update failed for. Of further note, #update_attributes is simply an alias of #update now.
:default_url => ActionController::Base.helpers.asset_path(‘missing_:style.png’) Then put the default images in app/assets/images/
I have a rake task that loads images (client logos) from a directory directly onto parperclip. You can probably adapt it to your needs. This is my simplified Client model: class Client < ActiveRecord::Base LOGO_STYLES = { :original => [‘1024×768>’, :jpg], :medium => [‘256×192#’, :jpg], :small => [‘128×96#’, :jpg] } has_attached_file :logo, :styles => Client::LOGO_STYLES, … Read more
Assuming you had an attachment called avatar on an instance of a user, you can use user.avatar.path to get the full path of the file on the filesystem, and you can use user.avatar.url to give the path which you could use in image tags and whatnot. Is that what you’re meaning?
Assuming you had an attachment called avatar on an instance of a user, you can use user.avatar.path to get the full path of the file on the filesystem, and you can use user.avatar.url to give the path which you could use in image tags and whatnot. Is that what you’re meaning?
I believe the easiest way for you to accomplish this will be to create a method in your object to return the avatar URL. class Model < ActiveRecord::Base … def avatar_url avatar.url(:medium) end … end This will then allow you to use the methods option when calling to_json with a simple method that does not … Read more
You only need to use # instead of > as a parameter: has_attached_file :picture, :styles => { :thumb => “200×200#” }