Added Functionality In This Fork

This is a pretty useful little gem. Thanks to @apeacox. I added a couple of extra options that you can pass to :image_preview input.

• :link_to_original : Accepts true or false. When set to true, it will wrap the image tag by a link tag and will link to original version of the image. This is useful when you are displaying a smaller version of the image and need the ability to see the full size image.
• :preview_html : Accepts html options and adds them to the link_tag (when :link_to_original is true) or to the image_tag (when :link_to_original is false). Useful to add a class or id for styling purposes.

Example Usage

Here is a basic example (copied and modified from below).

<%= simple_form_for @some_model do |f| %>
  <!-- we specify that this is an image form upload input, and we want to show the 'thumb' version
  of the carrierwave upload to not break our layout with a non-resized image -->
  <%= f.input :some_image_field, as: :image_preview, input_html: {preview_version: :thumb}, link_to_original: :true, preview_html: {class: :some_class, target: '_blank'} %>

<% end %>

Install

To use this fork, add following to your Gemfile and run bundle install.

gem 'simple_form_fancy_uploads', :github => 'san/simple_form_fancy_uploads'

SimpleForm fancy uploads

A set of simple_form (>= v2.0) custom inputs to get image previews or a link to uploaded file.

This gem uses the new simple_form 2.0 ability to write your own form tags (check the simple_form-bootstrap example). In 90% of cases, you need some kind of preview when it comes to uploaded files (avatar, images, docs, etc..), why should I write the same markup each time?

What you get

There're only two new file inputs:

• ImagePreview: guess what? when you edit an entry that contains an uploaded image, it will be shown (how many times did you this in a CMS?)
• AttachmentPreview: this is a generic upload field, it will show a direct link to the file, so you can check what was uploaded.

How it works

Install

Simply add gem 'simple_form_fancy_uploads' to your Gemfile and run bundle install

Usage

Here's a basic example, as you can see, it's just a matter of specify the input as :image_preview or :attachment_preview. If using :image_preview, you can also specify a :preview_version => :some_version_name inside the :input_html Hash. This will let you to show a custom version generated with Carrierwave. Nice, isn't it?

If you need to fallback on Carrierwave's #default_url method to show a default image defined in your upload class, set :use_default_url => true in the options hash.

<%= simple_form_for @some_model do |f| %>
  <!-- we specify that this is an image form upload input, and we want to show the 'thumb' version
  of the carrierwave upload to not break our layout with a non-resized image -->
  <%= f.input :some_image_field, as: :image_preview, input_html: {preview_version: :thumb} %>

  <!-- here's a *normal* attachment. with this input, a link to the filename will be shown
  if there's an uploaded file -->
  <%= f.input :some_attachment_field, as: :attachment_preview %>
<% end %>

Dependencies

To get it work, you need:

• simple_form >= v2.0 (repetita iuvant)
• carrierwave actually it's the most opinionated gem for uploads (thank you paperclip for the good times, but you know... life goes on)
• ruby 1.9+ (it uses some 1.9's syntax)

Testing

• clone this repo
• run bundle install
• run rspec spec

Contributions & Bugs

• the easy way: go to issues page and blame me.
• the hard way: repeat the above points, then show your power and send a pull request.

License

Copyright (c) 2012 Andrea Pavoni http://andreapavoni.com