dragonfly-gem

I'm looking for a quick solution for multi file upload with rails_admin. Any ideas or solutions out there? The approach I'd take here is to develop a custom action which would include it's own view and controller processing. You can generate a rails_admin plugin with the directions at the top of the page here . And here are some examples of custom actions I've built out: Import Print to PDF The import plugin has a supporting blog article here . This is the file you want to look at where you add your upload behavior inside the :controller instance option. 来源： https://stackoverflow.com/questions

I'm using dragonfly ~> 0.9.15 Given an image, I'm confused at how to use the convert method in dragonfly to crop a circular portion from the image with transparent background. I am able to use a direct image magick command to run it from command line but the example command I found uses actual files and I'm unaware of how to get the file while dragonfly processes it on the fly. Here's the actual command I took from a stack overflow question with imagemagick. https://stackoverflow.com/a/999563/1664852 convert -size 200x200 xc:none -fill walter.jpg -draw "circle 100,100 100,1" circle_thumb.png

I am new to dragonfly and trying to go through the setup directions on the main documentation page for rails. Not using Active Record. My steps: 1) add to Gemfile gem 'dragonfly', "~>1.0.3" 2) bundle install 3) rails g dragonfly created initializers/dragonfly.rb 4) model class Post include Mongoid::Document dragonfly_accessor :image field :title, type: String field :body, type: String end 5) controller params.require(:post).permit(:title, :body, :image) Just running mongod and rails s, I get the error of undefined method 'dragonfly_accessor' Any ideas what I am missing? Also, the user’s error

I've been searching for some examples, but have come up short: I'm trying to implement JQuery-File-Upload on a project I'm working on, but am getting lost as to how to get it to work with nested attributes. Quick overview: 2 Models: Comment [has_many :attachments] Attachment [belongs_to :comment] Comment accepts_nested_attributes_for :attachments . Also - I'm using Dragonfly. I've reviewed the Rails 3 guides on the JQuery-File-Upload site, but they assume it's a singular model, so it's all built around a form. Does anyone have any examples of their implementation or is there an existing

I'm working on upgrading a Rails 2.3.11, Ruby 1.9.2 app to Rails 3.0.10, and attachment_fu no longer works. I'm looking at changing to paperclip, carrierwave, or dragonfly for file uploads, or maybe a Rails 3 compatible, maintained version of attachment_fu. Which of these options would be the best to use in terms of performance, how well maintained it is, how easy it is to upgrade from attachment_fu, and maybe is it going to be Rails 3.1 compatible? What are the major strengths and disadvantages of each one? Any insight would be appreciated. I've used both Paperclip and Carrierwave, and if I